deliverable/linux.git
11 years agoshm: fix null pointer deref when userspace specifies invalid hugepage size
Li Zefan [Thu, 9 May 2013 07:08:15 +0000 (15:08 +0800)] 
shm: fix null pointer deref when userspace specifies invalid hugepage size

Dave reported an oops triggered by trinity:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  IP: newseg+0x10d/0x390
  PGD cf8c1067 PUD cf8c2067 PMD 0
  Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
  CPU: 2 PID: 7636 Comm: trinity-child2 Not tainted 3.9.0+#67
  ...
  Call Trace:
    ipcget+0x182/0x380
    SyS_shmget+0x5a/0x60
    tracesys+0xdd/0xe2

This bug was introduced by commit af73e4d9506d ("hugetlbfs: fix mmap
failure in unaligned size request").

Reported-by: Dave Jones <davej@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Li Zefan <lizfan@huawei.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoipc,sem: fix semctl(..., GETNCNT)
Rik van Riel [Thu, 9 May 2013 20:59:59 +0000 (16:59 -0400)] 
ipc,sem: fix semctl(..., GETNCNT)

The semctl GETNCNT returns the number of semops waiting for the
specified semaphore to become nonzero.  After commit 9f1bc2c9022c
("ipc,sem: have only one list in struct sem_queue"), the semops waiting
on just one semaphore are waiting on that semaphore's list.

In order to return the correct count, we have to walk that list too, in
addition to the sem_array's list for complex operations.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoipc,sem: fix semctl(..., GETZCNT)
Rik van Riel [Thu, 9 May 2013 20:53:28 +0000 (16:53 -0400)] 
ipc,sem: fix semctl(..., GETZCNT)

The semctl GETZCNT returns the number of semops waiting for the
specified semaphore to become zero.  After commit 9f1bc2c9022c
("ipc,sem: have only one list in struct sem_queue"), the semops waiting
on just one semaphore are waiting on that semaphore's list.

In order to return the correct count, we have to walk that list too, in
addition to the sem_array's list for complex operations.

This bug broke dbench; it works again with this patch applied.

Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Kent Overstreet <koverstreet@google.com>
Tested-by: Kent Overstreet <koverstreet@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Thu, 9 May 2013 20:44:35 +0000 (13:44 -0700)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull more vfs fixes from Al Viro:
 "Regression fix from Geert + yet another open-coded kernel_read()"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ecryptfs: don't open-code kernel_read()
  xtensa simdisk: Fix proc_create_data() conversion fallout

11 years agoARM: exynos: dts: Fixed vbus-gpios
Doug Anderson [Wed, 8 May 2013 17:37:16 +0000 (10:37 -0700)] 
ARM: exynos: dts: Fixed vbus-gpios

The 'samsung,vbus-gpio' was submitted before pinmux landed for
exynos5250 and uses the old-style gpio specifier.  Fix the two
exynos5250 boards that use it.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoARM: EXYNOS5: Fix kernel dump in AFTR idle mode
Inderpal Singh [Mon, 29 Apr 2013 11:31:47 +0000 (17:01 +0530)] 
ARM: EXYNOS5: Fix kernel dump in AFTR idle mode

The kernel crashes while resuming from AFTR idle mode. It happens
because L2 cache was not going into retention state.

This patch configures the USE_RETENTION bit of ARM_L2_OPTION register
so that it does not depend on MANUAL_L2RSTDISABLE_CONTROL of
ARM_COMMON_OPTION register for L2RSTDISABLE signal.

Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoMerge tag 'omap-for-v3.10/dt-fixes-for-merge-window' of git://git.kernel.org/pub...
Olof Johansson [Thu, 9 May 2013 20:14:02 +0000 (13:14 -0700)] 
Merge tag 'omap-for-v3.10/dt-fixes-for-merge-window' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

From Tony Lindgren:
Omap device tree fixes for issue discovered during the merge window:

- Fix triggering for GPIO interrupts that's needed for 4430sdp
  Ethernet. Otherwise booting with nfsroot won't work.
- Fix CPU operating point values
- Fix wrong assumption that twl PMIC is always connected to omap3
- Add gpmc for am33xx so beaglebone users can use the bus
- Cosmetic fix for mcspi pin muxing to avoid confusion

* tag 'omap-for-v3.10/dt-fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: don't assume boards are using twl4030 for omap3
  ARM: dts: Configure and fix the McSPI pins for 4430sdp
  ARM: dts: AM33XX: Add GPMC node
  ARM: dts: OMAP4460: Fix CPU OPP voltages
  ARM: dts: OMAP36xx: Fix CPU OPP voltages
  ARM: dts: OMAP4: Fix ethernet IRQ for OMAP4 boards

11 years agoMerge tag 'omap-for-v3.10/fixes-for-merge-window-part2' of git://git.kernel.org/pub...
Olof Johansson [Thu, 9 May 2013 20:12:31 +0000 (13:12 -0700)] 
Merge tag 'omap-for-v3.10/fixes-for-merge-window-part2' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

From Tony Lindgren:
Omap fixes for things that were discovered during the merge window:

- Few GPMC fixes and binding doc updates noted after sending
  pull requests for the GPMC branch.
- Board fixes for beagle usb host and rx51 spi probe order
- SoC fixes dt earlyprintk, omap1 dma and omap2+ id.c error
  handling fixes

Then few minor things that are not strictly fixes but are good
to get out of the way:

- Add missing legacy mux registers for am/dm73x gpio
- Add detection for am33xx pg2.1 silicon
- Enable twl4030 audio modules in defconfig

* tag 'omap-for-v3.10/fixes-for-merge-window-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: Remove bogus IS_ERR_OR_NULL checking from id.c
  ARM: OMAP4+: omap2plus_defconfig: Enable audio via TWL6040 as module
  ARM: OMAP2: AM33XX: id: Add support for new AM335x PG2.1 Si
  omap: mux: add AM/DM37x gpios
  ARM: OMAP1: DMA: fix error handling in omap1_system_dma_init()
  ARM: OMAP2+: omap_device: use late_initcall_sync
  ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices
  ARM: OMAP3: Beagle: Fix USB Host on beagle xM Ax/Bx
  ARM: OMAP2+: only WARN if a GPMC child probe function fail
  ARM: OMAP2+: only search for GPMC DT child nodes on probe
  Documentation: dt: update properties in TI GPMC NAND example
  Documentation: dt: update TI GPMC ethernet binding properties

Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoARM: ux500: Rid ignored return value of regulator_enable() compiler warning
Lee Jones [Thu, 2 May 2013 15:48:07 +0000 (16:48 +0100)] 
ARM: ux500: Rid ignored return value of regulator_enable() compiler warning

arch/arm/mach-ux500/board-mop500.c: In function ‘mop500_prox_activate’:
arch/arm/mach-ux500/board-mop500.c:406:18: warning: ignoring return value of
        ‘regulator_enable’, declared with attribute warn_unused_result
        [-Wunused-result]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoARM: ux500: read the correct soc_id number
Fabio Baltieri [Wed, 20 Feb 2013 08:29:16 +0000 (09:29 +0100)] 
ARM: ux500: read the correct soc_id number

Fix db8500_read_soc_id() to read all five soc_id number locations
instead of repeating the second one two times.

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Thu, 9 May 2013 20:07:40 +0000 (13:07 -0700)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs update from Chris Mason:
 "These are mostly fixes.  The biggest exceptions are Josef's skinny
  extents and Jan Schmidt's code to rebuild our quota indexes if they
  get out of sync (or you enable quotas on an existing filesystem).

  The skinny extents are off by default because they are a new variation
  on the extent allocation tree format.  btrfstune -x enables them, and
  the new format makes the extent allocation tree about 30% smaller.

  I rebased this a few days ago to rework Dave Sterba's crc checks on
  the super block, but almost all of these go back to rc6, since I
  though 3.9 was due any minute.

  The biggest missing fix is the tracepoint bug that was hit late in
  3.9.  I ran into problems with that in overnight testing and I'm still
  tracking it down.  I'll definitely have that fixed for rc2."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (101 commits)
  Btrfs: allow superblock mismatch from older mkfs
  btrfs: enhance superblock checks
  btrfs: fix misleading variable name for flags
  btrfs: use unsigned long type for extent state bits
  Btrfs: improve the loop of scrub_stripe
  btrfs: read entire device info under lock
  btrfs: remove unused gfp mask parameter from release_extent_buffer callchain
  btrfs: handle errors returned from get_tree_block_key
  btrfs: make static code static & remove dead code
  Btrfs: deal with errors in write_dev_supers
  Btrfs: remove almost all of the BUG()'s from tree-log.c
  Btrfs: deal with free space cache errors while replaying log
  Btrfs: automatic rescan after "quota enable" command
  Btrfs: rescan for qgroups
  Btrfs: split btrfs_qgroup_account_ref into four functions
  Btrfs: allocate new chunks if the space is not enough for global rsv
  Btrfs: separate sequence numbers for delayed ref tracking and tree mod log
  btrfs: move leak debug code to functions
  Btrfs: return free space in cow error path
  Btrfs: set UUID in root_item for created trees
  ...

11 years agoARM: exynos: dts: cros5250: add cyapa trackpad
Olof Johansson [Fri, 26 Apr 2013 23:41:21 +0000 (16:41 -0700)] 
ARM: exynos: dts: cros5250: add cyapa trackpad

Trivial patch, adding the i2c Cypress trackpad used on Snow.

Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
11 years agoMerge tag 'for-linus-v3.10-rc1-2' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Thu, 9 May 2013 20:06:20 +0000 (13:06 -0700)] 
Merge tag 'for-linus-v3.10-rc1-2' of git://oss.sgi.com/xfs/xfs

Pull xfs update (#2) from Ben Myers:

 - add CONFIG_XFS_WARN, a step between zero debugging and
   CONFIG_XFS_DEBUG.

 - fix attrmulti and attrlist to fall back to vmalloc when kmalloc
   fails.

* tag 'for-linus-v3.10-rc1-2' of git://oss.sgi.com/xfs/xfs:
  xfs: fallback to vmalloc for large buffers in xfs_compat_attrlist_by_handle
  xfs: fallback to vmalloc for large buffers in xfs_attrlist_by_handle
  xfs: introduce CONFIG_XFS_WARN

11 years agovideo: mxsfb: Adapt to new videomode API
Fabio Estevam [Wed, 8 May 2013 13:05:55 +0000 (21:05 +0800)] 
video: mxsfb: Adapt to new videomode API

commit 6cd2c7db4 (videomode: videomode_from_timing work) changed the name of
the function from videomode_from_timing() to videomode_from_timings().

commit 32ed6ef1 (videomode: create enum for videomode's display flags) changed
the 'data_flags' field in videomode structure to 'flags'

Adapt to these changes in order to fix the following errors:

drivers/video/mxsfb.c:761:3: error: too many arguments to function 'videomode_from_timing'
drivers/video/mxsfb.c:761:7: error: void value not ignored as it ought to be
drivers/video/mxsfb.c:768:9: error: 'struct videomode' has no member named 'data_flags'
drivers/video/mxsfb.c:770:9: error: 'struct videomode' has no member named 'data_flags'

Also, select VIDEOMODE_HELPER instead of OF_VIDEOMODE, as this one is
deprecated.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoARM: imx: Select GENERIC_ALLOCATOR
Fabio Estevam [Wed, 8 May 2013 13:05:54 +0000 (21:05 +0800)] 
ARM: imx: Select GENERIC_ALLOCATOR

Since commit 657eee7 (media: coda: use genalloc API) the following build
error happens with imx_v4_v5_defconfig:

drivers/built-in.o: In function 'coda_remove':
clk-composite.c:(.text+0x112180): undefined reference to 'gen_pool_free'
drivers/built-in.o: In function 'coda_probe':
clk-composite.c:(.text+0x112310): undefined reference to 'of_get_named_gen_pool'
clk-composite.c:(.text+0x1123f4): undefined reference to 'gen_pool_alloc'
clk-composite.c:(.text+0x11240c): undefined reference to 'gen_pool_virt_to_phys'
clk-composite.c:(.text+0x112458): undefined reference to 'dev_get_gen_pool'

Select GENERIC_ALLOCATOR and get rid of the custom IRAM_ALLOC.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoARM: imx: compile fix for hotplug.c
Shawn Guo [Wed, 8 May 2013 13:05:53 +0000 (21:05 +0800)] 
ARM: imx: compile fix for hotplug.c

Commit bca7a5a (ARM: cpu hotplug: remove majority of cache flushing
from platforms) removes include of <asm/cacheflush.h> and hence
discovers a few indirect inclusion and declaration problems as below.

  CC      arch/arm/mach-imx/hotplug.o
In file included from arch/arm/mach-imx/hotplug.c:16:0:
arch/arm/mach-imx/common.h:100:29: warning: ‘struct pt_regs’ declared inside parameter list [enabled by default]
arch/arm/mach-imx/common.h:100:29: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
arch/arm/mach-imx/common.h:101:29: warning: ‘struct pt_regs’ declared inside parameter list [enabled by default]
arch/arm/mach-imx/hotplug.c: In function ‘imx_cpu_die’:
arch/arm/mach-imx/hotplug.c:53:2: error: implicit declaration of function ‘cpu_do_idle’ [-Werror=implicit-function-declaration]
arch/arm/mach-imx/hotplug.c: In function ‘imx_cpu_kill’:
arch/arm/mach-imx/hotplug.c:58:26: error: ‘jiffies’ undeclared (first use in this function)
arch/arm/mach-imx/hotplug.c:58:26: note: each undeclared identifier is reported only once for each function it appears in
arch/arm/mach-imx/hotplug.c:58:2: error: implicit declaration of function ‘msecs_to_jiffies’ [-Werror=implicit-function-declaration]
arch/arm/mach-imx/hotplug.c:61:3: error: implicit declaration of function ‘time_after’ [-Werror=implicit-function-declaration]

Fix them by adding the needed inclusion and declaration.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoMerge branch 'late/fixes' into fixes
Olof Johansson [Thu, 9 May 2013 20:05:00 +0000 (13:05 -0700)] 
Merge branch 'late/fixes' into fixes

* late/fixes:
  ARM: OMAP2+: Fix unmet direct dependencies for SERIAL_OMAP
  ARM: ux500: always select ABX500_CORE
  ARM: SIRF: select SMP_ON_UP only on SMP builds
  ARM: SPEAr: conditionalize l2x0 support
  ARM: imx: build CPU suspend code only when needed
  ARM: OMAP: build SMP code only for OMAP4/5
  ARM: tegra: Tegra114 needs CPU_FREQ_TABLE
  ARM: default machine descriptor for multiplatform

Signed-off-by: Olof Johansson <olof@lixom.net>
11 years agoNVMe: Use user defined admin ioctl timeout
Keith Busch [Thu, 9 May 2013 20:01:38 +0000 (14:01 -0600)] 
NVMe: Use user defined admin ioctl timeout

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
11 years agoswitch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE
Al Viro [Tue, 19 Mar 2013 18:25:51 +0000 (14:25 -0400)] 
switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agounicore32: just use mmap_pgoff()...
Al Viro [Wed, 6 Mar 2013 01:12:41 +0000 (20:12 -0500)] 
unicore32: just use mmap_pgoff()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agousb: tilegx: fix memleak when create hcd fail
Libo Chen [Thu, 9 May 2013 06:08:33 +0000 (02:08 -0400)] 
usb: tilegx: fix memleak when create hcd fail

When usb_create_hcd fail, we should call gxio_usb_host_destroy

Signed-off-by: Libo Chen <libo.chen@huawei.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [extended to EHCI]
11 years agoarch/tile: remove inline marking of EXPORT_SYMBOL functions
Denis Efremov [Thu, 9 May 2013 10:36:53 +0000 (14:36 +0400)] 
arch/tile: remove inline marking of EXPORT_SYMBOL functions

EXPORT_SYMBOL and inline directives are contradictory to each other.
The patch fixes this inconsistency.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
11 years agounify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE
Al Viro [Wed, 6 Mar 2013 01:10:59 +0000 (20:10 -0500)] 
unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoecryptfs: don't open-code kernel_read()
Al Viro [Wed, 8 May 2013 02:28:48 +0000 (22:28 -0400)] 
ecryptfs: don't open-code kernel_read()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoMerge tag 'nfs-for-3.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Thu, 9 May 2013 17:24:54 +0000 (10:24 -0700)] 
Merge tag 'nfs-for-3.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull more NFS client bugfixes from Trond Myklebust:

 - Ensure that we match the 'sec=' mount flavour against the server list

 - Fix the NFSv4 byte range locking in the presence of delegations

 - Ensure that we conform to the NFSv4.1 spec w.r.t.  freeing lock
   stateids

 - Fix a pNFS data server connection race

* tag 'nfs-for-3.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS4.1 Fix data server connection race
  NFSv3: match sec= flavor against server list
  NFSv4.1: Ensure that we free the lock stateid on the server
  NFSv4: Convert nfs41_free_stateid to use an asynchronous RPC call
  SUNRPC: Don't spam syslog with "Pseudoflavor not found" messages
  NFSv4.x: Fix handling of partially delegated locks

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 9 May 2013 17:23:43 +0000 (10:23 -0700)] 
Merge git://git./linux/kernel/git/davem/net

Pull networking update from David Miller:

 1) Propagate return error values properly in irda, spider_net, sfc, and
    bfin_mac.  From Wei Yongjun.

 2) Fix fec driver OOPS on rapid link up/down, from Frank Li.

 3) FIX VF resource allocation and chip message payload length errors in
    be2net driver, from Sathya Perla.

 4) Fix inner protocol inspection during GSO from Pravin B Shelar.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  if_cablemodem.h: Add parenthesis around ioctl macros
  gso: Handle Trans-Ether-Bridging protocol in skb_network_protocol()
  net: fec: fix kernel oops when plug/unplug cable many times
  bfin_mac: fix error return code in bfin_mac_probe()
  sfc: fix return value check in efx_ptp_probe_channel()
  net/spider_net: fix error return code in spider_net_open()
  net/irda: fix error return code in bfin_sir_open()
  net: of_mdio: fix behavior on missing phy device
  sierra_net: keep status interrupt URB active
  usbnet: allow status interrupt URB to always be active
  qmi_wwan/cdc_ether: add device IDs for Dell 5804 (Novatel E371) WWAN card
  be2net: disable TX in be_close()
  be2net: fix EQ from getting full while cleaning RX CQ
  be2net: fix payload_len value for GET_MAC_LIST cmd req
  be2net: provision VF resources before enabling SR-IOV

11 years agoMerge tag 'pci-v3.10-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Thu, 9 May 2013 17:21:44 +0000 (10:21 -0700)] 
Merge tag 'pci-v3.10-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "MSI:
      PCI: Set ->mask_pos correctly
  Hotplug:
      PCI: Delay final fixups until resources are assigned
  Moorestown:
      x86/pci/mrst: Use configuration mechanism 1 for 00:00.0, 00:02.0, 00:03.0"

* tag 'pci-v3.10-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Delay final fixups until resources are assigned
  x86/pci/mrst: Use configuration mechanism 1 for 00:00.0, 00:02.0, 00:03.0
  PCI: Set ->mask_pos correctly

11 years agoxtensa simdisk: Fix proc_create_data() conversion fallout
Geert Uytterhoeven [Thu, 9 May 2013 12:08:31 +0000 (14:08 +0200)] 
xtensa simdisk: Fix proc_create_data() conversion fallout

arch/xtensa/platforms/iss/simdisk.c: In function 'proc_read_simdisk':
arch/xtensa/platforms/iss/simdisk.c:220:12: warning: initialization discards 'const' qualifier from pointer target type [enabled by default]
arch/xtensa/platforms/iss/simdisk.c: In function 'proc_write_simdisk':
arch/xtensa/platforms/iss/simdisk.c:241:38: error: 'buffer' undeclared (first use in this function)
arch/xtensa/platforms/iss/simdisk.c:241:38: note: each undeclared identifier is reported only once for each function it appears in

Introduced by commit a69755b187749e7cc020e17127a54f395aea4eaa ("xtensa
simdisk: switch to proc_create_data()")

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoMerge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd
Linus Torvalds [Thu, 9 May 2013 17:15:46 +0000 (10:15 -0700)] 
Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd

Pull MTD update from David Woodhouse:

 - Lots of cleanups from Artem, including deletion of some obsolete
   drivers

 - Support partitions larger than 4GiB in device tree

 - Support for new SPI chips

* tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd: (83 commits)
  mtd: omap2: Use module_platform_driver()
  mtd: bf5xx_nand: Use module_platform_driver()
  mtd: denali_dt: Remove redundant use of of_match_ptr
  mtd: denali_dt: Change return value to fix smatch warning
  mtd: denali_dt: Use module_platform_driver()
  mtd: denali_dt: Fix incorrect error check
  mtd: nand: subpage write support for hardware based ECC schemes
  mtd: omap2: use msecs_to_jiffies()
  mtd: nand_ids: use size macros
  mtd: nand_ids: improve LEGACY_ID_NAND macro a bit
  mtd: add 4 Toshiba nand chips for the full-id case
  mtd: add the support to parse out the full-id nand type
  mtd: add new fields to nand_flash_dev{}
  mtd: sh_flctl: Use of_match_ptr() macro
  mtd: gpio: Use of_match_ptr() macro
  mtd: gpio: Use devm_kzalloc()
  mtd: davinci_nand: Use of_match_ptr()
  mtd: dataflash: Use of_match_ptr() macro
  mtd: remove h720x flash support
  mtd: onenand: remove OneNAND simulator
  ...

11 years agoMerge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
Linus Torvalds [Thu, 9 May 2013 17:11:48 +0000 (10:11 -0700)] 
Merge tag 'firewire-updates' of git://git./linux/kernel/git/ieee1394/linux1394

Pull firewure updates from Stefan Richter:
  - fix controller removal when controller is in suspended state
  - fix video reception on VIA VT6306 with gstreamer, MythTV, and maybe dv4l
  - fix a startup issue with Agere/LSI FW643-e2
  - error logging improvements and other small updates

* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: ohci: dump_stack() for PHY regs read/write failures
  firewire: ohci: Improve bus reset error messages
  firewire: ohci: Alias dev_* log functions
  firewire: ohci: Fix 'failed to read phy reg' on FW643 rev8
  firewire: ohci: fix VIA VT6306 video reception
  firewire: ohci: Check LPS before register access on pci removal
  firewire: ohci: Fix double free_irq()
  firewire: remove unnecessary alloc/OOM messages
  firewire: sbp2: replace BUG_ON by WARN_ON
  firewire: core: remove an always false test
  firewire: Remove two unneeded checks for macros

11 years agoMerge tag 'edac_fixes_for_3.10' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 9 May 2013 17:11:08 +0000 (10:11 -0700)] 
Merge tag 'edac_fixes_for_3.10' of git://git./linux/kernel/git/bp/bp

Pull two small EDAC fixes from Borislav Petkov.

* tag 'edac_fixes_for_3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC: Don't give write permission to read-only files
  EDAC, mc_sysfs.c: Fix string array pointer types

11 years agoMerge git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Thu, 9 May 2013 17:09:14 +0000 (10:09 -0700)] 
Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog update from Wim Van Sebroeck:
 "Fix a kdump issue in hpwdt and a possible NULL dereference"

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: Fix race condition in registration code
  watchdog: Convert to devm_ioremap_resource()

11 years agoMerge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux
Linus Torvalds [Thu, 9 May 2013 16:59:16 +0000 (09:59 -0700)] 
Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux

Pull removal of GENERIC_GPIO from Grant Likely:
 "GENERIC_GPIO now synonymous with GPIOLIB.  There are no longer any
  valid cases for enableing GENERIC_GPIO without GPIOLIB, even though it
  is possible to do so which has been causing confusion and breakage.
  This branch does the work to completely eliminate GENERIC_GPIO."

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux:
  gpio: update gpio Chinese documentation
  Remove GENERIC_GPIO config option
  Convert selectors of GENERIC_GPIO to GPIOLIB
  blackfin: force use of gpiolib
  m68k: coldfire: use gpiolib
  mips: pnx833x: remove requirement for GENERIC_GPIO
  openrisc: default GENERIC_GPIO to false
  avr32: default GENERIC_GPIO to false
  xtensa: remove explicit selection of GENERIC_GPIO
  sh: replace CONFIG_GENERIC_GPIO by CONFIG_GPIOLIB
  powerpc: remove redundant GENERIC_GPIO selection
  unicore32: default GENERIC_GPIO to false
  unicore32: remove unneeded select GENERIC_GPIO
  arm: plat-orion: use GPIO driver on CONFIG_GPIOLIB
  arm: remove redundant GENERIC_GPIO selection
  mips: alchemy: require gpiolib
  mips: txx9: change GENERIC_GPIO to GPIOLIB
  mips: loongson: use GPIO driver on CONFIG_GPIOLIB
  mips: remove redundant GENERIC_GPIO select

11 years agonfsd: fix oops when legacy_recdir_name_error is passed a -ENOENT error
Jeff Layton [Thu, 9 May 2013 12:36:23 +0000 (08:36 -0400)] 
nfsd: fix oops when legacy_recdir_name_error is passed a -ENOENT error

Toralf reported the following oops to the linux-nfs mailing list:

    -----------------[snip]------------------
    NFSD: unable to generate recoverydir name (-2).
    NFSD: disabling legacy clientid tracking. Reboot recovery will not function correctly!
    BUG: unable to handle kernel NULL pointer dereference at 000003c8
    IP: [<f90a3d91>] nfsd4_client_tracking_exit+0x11/0x50 [nfsd]
    *pdpt = 000000002ba33001 *pde = 0000000000000000
    Oops: 0000 [#1] SMP
    Modules linked in: loop nfsd auth_rpcgss ipt_MASQUERADE xt_owner xt_multiport ipt_REJECT xt_tcpudp xt_recent xt_conntrack nf_conntrack_ftp xt_limit xt_LOG iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables af_packet pppoe pppox ppp_generic slhc bridge stp llc tun arc4 iwldvm mac80211 coretemp kvm_intel uvcvideo sdhci_pci sdhci mmc_core videobuf2_vmalloc videobuf2_memops usblp videobuf2_core i915 iwlwifi psmouse videodev cfg80211 kvm fbcon bitblit cfbfillrect acpi_cpufreq mperf evdev softcursor font cfbimgblt i2c_algo_bit cfbcopyarea intel_agp intel_gtt drm_kms_helper snd_hda_codec_conexant drm agpgart fb fbdev tpm_tis thinkpad_acpi tpm nvram e1000e rfkill thermal ptp wmi pps_core tpm_bios 8250_pci processor 8250 ac snd_hda_intel snd_hda_codec snd_pcm battery video i2c_i801 snd_page_alloc snd_timer button serial_core i2c_core snd soundcore thermal_sys hwmon aesni_intel ablk_helper cryp
td lrw aes_i586 xts gf128mul cbc fuse nfs lockd sunrpc dm_crypt dm_mod hid_monterey hid_microsoft hid_logitech hid_ezkey hid_cypress hid_chicony hid_cherry hid_belkin hid_apple hid_a4tech hid_generic usbhid hid sr_mod cdrom sg [last unloaded: microcode]
    Pid: 6374, comm: nfsd Not tainted 3.9.1 #6 LENOVO 4180F65/4180F65
    EIP: 0060:[<f90a3d91>] EFLAGS: 00010202 CPU: 0
    EIP is at nfsd4_client_tracking_exit+0x11/0x50 [nfsd]
    EAX: 00000000 EBX: fffffffe ECX: 00000007 EDX: 00000007
    ESI: eb9dcb00 EDI: eb2991c0 EBP: eb2bde38 ESP: eb2bde34
    DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
    CR0: 80050033 CR2: 000003c8 CR3: 2ba80000 CR4: 000407f0
    DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
    DR6: ffff0ff0 DR7: 00000400
    Process nfsd (pid: 6374, ti=eb2bc000 task=eb2711c0 task.ti=eb2bc000)
    Stack:
    fffffffe eb2bde4c f90a3e0c f90a7754 fffffffe eb0a9c00 eb2bdea0 f90a41ed
    eb2991c0 1b270000 eb2991c0 eb2bde7c f9099ce9 eb2bde98 0129a020 eb29a020
    eb2bdecc eb2991c0 eb2bdea8 f9099da5 00000000 eb9dcb00 00000001 67822f08
    Call Trace:
    [<f90a3e0c>] legacy_recdir_name_error+0x3c/0x40 [nfsd]
    [<f90a41ed>] nfsd4_create_clid_dir+0x15d/0x1c0 [nfsd]
    [<f9099ce9>] ? nfsd4_lookup_stateid+0x99/0xd0 [nfsd]
    [<f9099da5>] ? nfs4_preprocess_seqid_op+0x85/0x100 [nfsd]
    [<f90a4287>] nfsd4_client_record_create+0x37/0x50 [nfsd]
    [<f909d6ce>] nfsd4_open_confirm+0xfe/0x130 [nfsd]
    [<f90980b1>] ? nfsd4_encode_operation+0x61/0x90 [nfsd]
    [<f909d5d0>] ? nfsd4_free_stateid+0xc0/0xc0 [nfsd]
    [<f908fd0b>] nfsd4_proc_compound+0x41b/0x530 [nfsd]
    [<f9081b7b>] nfsd_dispatch+0x8b/0x1a0 [nfsd]
    [<f857b85d>] svc_process+0x3dd/0x640 [sunrpc]
    [<f908165d>] nfsd+0xad/0x110 [nfsd]
    [<f90815b0>] ? nfsd_destroy+0x70/0x70 [nfsd]
    [<c1054824>] kthread+0x94/0xa0
    [<c1486937>] ret_from_kernel_thread+0x1b/0x28
    [<c1054790>] ? flush_kthread_work+0xd0/0xd0
    Code: 86 b0 00 00 00 90 c5 0a f9 c7 04 24 70 76 0a f9 e8 74 a9 3d c8 eb ba 8d 76 00 55 89 e5 53 66 66 66 66 90 8b 15 68 c7 0a f9 85 d2 <8b> 88 c8 03 00 00 74 2c 3b 11 77 28 8b 5c 91 08 85 db 74 22 8b
    EIP: [<f90a3d91>] nfsd4_client_tracking_exit+0x11/0x50 [nfsd] SS:ESP 0068:eb2bde34
    CR2: 00000000000003c8
    ---[ end trace 09e54015d145c9c6 ]---

The problem appears to be a regression that was introduced in commit
9a9c6478 "nfsd: make NFSv4 recovery client tracking options per net".
Prior to that commit, it was safe to pass a NULL net pointer to
nfsd4_client_tracking_exit in the legacy recdir case, and
legacy_recdir_name_error did so. After that comit, the net pointer must
be valid.

This patch just fixes legacy_recdir_name_error to pass in a valid net
pointer to that function.

Cc: <stable@vger.kernel.org> # v3.8+
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
Reported-and-tested-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
11 years agoMerge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Thu, 9 May 2013 16:46:45 +0000 (09:46 -0700)] 
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

Pull slave-dmaengine updates from Vinod Koul:
 "This time we have dmatest improvements from Andy along with dw_dmac
  fixes.  He has also done support for acpi for dmanegine.

  Also we have bunch of fixes going in DT support for dmanegine for
  various folks.  Then Haswell and other ioat changes from Dave and
  SUDMAC support from Shimoda."

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits)
  dma: tegra: implement suspend/resume callbacks
  dma:of: Use a mutex to protect the of_dma_list
  dma: of: Fix of_node reference leak
  dmaengine: sirf: move driver init from module_init to subsys_initcall
  sudmac: add support for SUDMAC
  dma: sh: add Kconfig
  at_hdmac: move to generic DMA binding
  ioatdma: ioat3_alloc_sed can be static
  ioatdma: Adding write back descriptor error status support for ioatdma 3.3
  ioatdma: S1200 platforms ioatdma channel 2 and 3 falsely advertise RAID cap
  ioatdma: Adding support for 16 src PQ ops and super extended descriptors
  ioatdma: Removing hw bug workaround for CB3.x .2 and earlier
  dw_dmac: add ACPI support
  dmaengine: call acpi_dma_request_slave_channel as well
  dma: acpi-dma: introduce ACPI DMA helpers
  dma: of: Remove unnecessary list_empty check
  DMA: OF: Check properties value before running be32_to_cpup() on it
  DMA: of: Constant names
  ioatdma: skip silicon bug workaround for pq_align for cb3.3
  ioatdma: Removing PQ val disable for cb3.3
  ...

11 years agoMerge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Linus Torvalds [Thu, 9 May 2013 16:40:49 +0000 (09:40 -0700)] 
Merge branch 'next' of git://git./linux/kernel/git/rzhang/linux

Pull thermal management update from Zhang Rui:
 "The most important one is to build thermal core and governor and cpu
  cooling code into one module.  This fixes a regression that thermal
  core does not work if it is built as module, since 3.7.  I'll backport
  them to stable kernel once those changes are in upstream.

  The largest batch is the thermal kernel-doc & coding style
  updates/cleanups from Eduardo.

  Highlights:

   - build all thermal framework code into one module to fix a
     regression that thermal does not work if it is built as module.

   - Marvell Armada 370/XP thermal sensor driver

   - thermal core/cpu cooling kernel-doc & coding style updates and
     cleanups.

   - Add Eduardo Valentin as thermal sub-maintainer, both in mailing
     list and patchwork.  He will help me on arm thermal drivers."

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (68 commits)
  thermal: db8500_cpufreq_cooling: remove usage of IS_ERR_OR_NULL()
  thermal: thermal_core: remove usage of IS_ERR_OR_NULL
  thermal: cpu_cooling: improve line breaking
  thermal: cpu_cooling: alignment improvements
  thermal: cpu_cooling: remove checkpatch.pl warning
  thermal: cpu_cooling: remove trailing blank line
  thermal: cpu_cooling: align on open parenthesis
  thermal: cpu_cooling: standardize comment style
  thermal: cpu_cooling: standardize end of function
  thermal: cpu_cooling: remove trailing white spaces
  Thermal: update documentation for thermal_zone_device_register
  thermal: update kernel-doc for thermal_zone_device_register
  thermal: update kernel-doc for create_trip_attrs
  thermal: update kernel-doc for thermal_cooling_device_register
  thermal: update kernel-doc for thermal_zone_unbind_cooling_device
  thermal: update kernel-doc for thermal_zone_bind_cooling_device
  thermal: use EXPORT_SYMBOL_GPL
  thermal: rename notify_thermal_framework to thermal_notify_framework
  thermal: update driver license
  thermal: use strlcpy instead of strcpy
  ...

11 years agoARC: [mm] Aliasing VIPT dcache support 4/4
Vineet Gupta [Thu, 9 May 2013 13:50:43 +0000 (19:20 +0530)] 
ARC: [mm] Aliasing VIPT dcache support 4/4

Enforce congruency of userspace shared mappings

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
11 years agoARC: [mm] Aliasing VIPT dcache support 3/4
Vineet Gupta [Thu, 9 May 2013 16:25:27 +0000 (21:55 +0530)] 
ARC: [mm] Aliasing VIPT dcache support 3/4

Fix the one zillion warnings

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
11 years agoARC: [mm] Aliasing VIPT dcache support 2/4
Vineet Gupta [Thu, 9 May 2013 16:24:51 +0000 (21:54 +0530)] 
ARC: [mm] Aliasing VIPT dcache support 2/4

This is the meat of the series which prevents any dcache alias creation
by always keeping the U and K mapping of a page congruent.
If a mapping already exists, and other tries to access the page, prev
one is flushed to physical page (wback+inv)

Essentially flush_dcache_page()/copy_user_highpage() create K-mapping
of a page, but try to defer flushing, unless U-mapping exist.
When page is actually mapped to userspace, update_mmu_cache() flushes
the K-mapping (in certain cases this can be optimised out)

Additonally flush_cache_mm(), flush_cache_range(), flush_cache_page()
handle the puring of stale userspace mappings on exit/munmap...

flush_anon_page() handles the existing U-mapping for anon page before
kernel reads it via the GUP path.

Note that while not complete, this is enough to boot a simple
dynamically linked Busybox based rootfs

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
11 years agoARC: [mm] Aliasing VIPT dcache support 1/4
Vineet Gupta [Thu, 9 May 2013 09:40:18 +0000 (15:10 +0530)] 
ARC: [mm] Aliasing VIPT dcache support 1/4

This preps the low level dcache flush helpers to take vaddr argument in
addition to the existing paddr to properly flush the VIPT dcache

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
11 years agoARM: dts: don't assume boards are using twl4030 for omap3
Jason Cooper [Thu, 9 May 2013 16:06:57 +0000 (09:06 -0700)] 
ARM: dts: don't assume boards are using twl4030 for omap3

If a board isn't using twl4030, then dtc will complain about the missing
phandle (which is in twl4030.dtsi).  Move the phy declaration to the dts
files.

Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
11 years agoARM: OMAP2+: Remove bogus IS_ERR_OR_NULL checking from id.c
Tony Lindgren [Thu, 9 May 2013 15:27:25 +0000 (08:27 -0700)] 
ARM: OMAP2+: Remove bogus IS_ERR_OR_NULL checking from id.c

Commit 6770b211 (ARM: OMAP2+: Export SoC information to userspace)
had some broken return value handling as noted by Russell King:

+       soc_dev = soc_device_register(soc_dev_attr);
+       if (IS_ERR_OR_NULL(soc_dev)) {
+               kfree(soc_dev_attr);
+               return;
+       }
+
+       parent = soc_device_to_device(soc_dev);
+       if (!IS_ERR_OR_NULL(parent))
+               device_create_file(parent, &omap_soc_attr);

This is nonsense.  For the first, IS_ERR() is sufficient.  For the second,
tell me what error checking is required in the return value of this
function:

struct device *soc_device_to_device(struct soc_device *soc_dev)
{
        return &soc_dev->dev;
}

when you've already determined that the passed soc_dev is a valid pointer.
If you read the comments against the prototype:

/**
 * soc_device_to_device - helper function to fetch struct device
 * @soc: Previously registered SoC device container
 */
struct device *soc_device_to_device(struct soc_device *soc);

if "soc" is valid, it means the "previously registered SoC device container"
must have succeeded and that can only happen if the struct device has been
registered.  Ergo, there will always be a valid struct device pointer for
any registered SoC device container.  Therefore, if soc_device_register()
succeeds, then the return value from soc_device_to_device() will always be
valid and no error checking of it is required.

Simples.  The rule as ever applies here: get to know the APIs your using
and don't fumble around in the dark hoping that you'll get this stuff
right.

Fix it as noted by Russell.

Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
11 years agoMerge branch 'mti-next' of git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into...
Ralf Baechle [Thu, 9 May 2013 15:57:30 +0000 (17:57 +0200)] 
Merge branch 'mti-next' of git://git.linux-mips.org/sjhill/linux-sjhill into mips-for-linux-next

11 years agoMerge branch 'next/kvm' into mips-for-linux-next
Ralf Baechle [Thu, 9 May 2013 15:56:40 +0000 (17:56 +0200)] 
Merge branch 'next/kvm' into mips-for-linux-next

11 years agoMIPS: Add new GIC clockevent driver.
Raghu Gandham [Wed, 10 Apr 2013 21:30:12 +0000 (16:30 -0500)] 
MIPS: Add new GIC clockevent driver.

Add new clockevent driver that uses the counter present on the MIPS
Global Interrupt Controller.

Signed-off-by: Raghu Gandham <Raghu.Gandham@imgtec.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: Formatting clean-ups for clocksources.
Steven J. Hill [Wed, 10 Apr 2013 21:29:13 +0000 (16:29 -0500)] 
MIPS: Formatting clean-ups for clocksources.

Various whitespace and #ifdef removals for GIC and R4K clocksources.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: Refactor GIC clocksource code.
Steven J. Hill [Wed, 10 Apr 2013 21:28:36 +0000 (16:28 -0500)] 
MIPS: Refactor GIC clocksource code.

Reorganize some of the GIC clocksource driver code. Below is a list of
the various changes.

  * No longer select CSRC_GIC by default for Malta platform.
  * Limit choice for either the GIC or R4K clocksource, not both.
  * Change location in Makefile.
  * Created new 'gic_read_count' function in common 'irq-gic.c' file.
  * Change 'git_hpt_read' function in 'csrc-gic.c' to use new function.
  * Surround GIC specific code in Malta platform code with #ifdef's.
  * Only initialize the GIC clocksource if it was selected. Original
    code called it unconditionally if a GIC was found.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: Move 'gic_frequency' to common location.
Steven J. Hill [Wed, 10 Apr 2013 21:27:50 +0000 (16:27 -0500)] 
MIPS: Move 'gic_frequency' to common location.

Move the global variable 'gic_frequency' to be defined in the file
'arch/mips/kernel/irq-gic.c' instead of defining it individually
for each platform making use of the GIC. Also change the type to
be an unsigned integer instead of signed.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: Move 'gic_present' to common location.
Steven J. Hill [Wed, 10 Apr 2013 21:27:04 +0000 (16:27 -0500)] 
MIPS: Move 'gic_present' to common location.

Move the global variable 'gic_present' to be defined in the file
'arch/mips/kernel/irq-gic.c' instead of defining it individually
for each platform making use of the GIC. Also change the type to
be an unsigned integer instead of signed.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: MIPS16e: Add unaligned access support.
Steven J. Hill [Mon, 25 Mar 2013 18:46:15 +0000 (13:46 -0500)] 
MIPS: MIPS16e: Add unaligned access support.

Add logic needed to handle unaligned accesses in MIPS16e mode.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
11 years agoMIPS: MIPS16e: Support handling of delay slots.
Steven J. Hill [Mon, 25 Mar 2013 18:45:19 +0000 (13:45 -0500)] 
MIPS: MIPS16e: Support handling of delay slots.

Add logic needed to properly calculate exceptions for delay slots
when in MIPS16e mode.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: MIPS16e: Add instruction formats.
Steven J. Hill [Mon, 25 Mar 2013 18:44:04 +0000 (13:44 -0500)] 
MIPS: MIPS16e: Add instruction formats.

Add structures for all the MIPS16e instructions. Also add the
enumerations for all the bit fields for opcodes, functions, etc.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Optimise 'strnlen' core library function.
Steven J. Hill [Mon, 25 Mar 2013 18:42:18 +0000 (13:42 -0500)] 
MIPS: microMIPS: Optimise 'strnlen' core library function.

Optimise 'strnlen' to use microMIPS instructions and/or optimisations
for binary size reduction. When the microMIPS ISA is not being used,
the library function compiles to the original binary code.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Optimise 'strlen' core library function.
Steven J. Hill [Mon, 25 Mar 2013 18:41:47 +0000 (13:41 -0500)] 
MIPS: microMIPS: Optimise 'strlen' core library function.

Optimise 'strlen' to use microMIPS instructions and/or optimisations
for binary size reduction. When the microMIPS ISA is not being used,
the library function compiles to the original binary code.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Optimise 'strncpy' core library function.
Steven J. Hill [Mon, 25 Mar 2013 18:41:18 +0000 (13:41 -0500)] 
MIPS: microMIPS: Optimise 'strncpy' core library function.

Optimise 'strncpy' to use microMIPS instructions and/or optimisations
for binary size reduction. When the microMIPS ISA is not being used,
the library function compiles to the original binary code.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Optimise 'memset' core library function.
Steven J. Hill [Mon, 25 Mar 2013 18:40:49 +0000 (13:40 -0500)] 
MIPS: microMIPS: Optimise 'memset' core library function.

Optimise 'memset' to use microMIPS instructions and/or optimisations
for binary size reduction. When the microMIPS ISA is not being used,
the library function compiles to the original binary code.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Add configuration option for microMIPS kernel.
Steven J. Hill [Mon, 25 Mar 2013 18:27:11 +0000 (13:27 -0500)] 
MIPS: microMIPS: Add configuration option for microMIPS kernel.

This adds the option to build the Linux kernel using only the
microMIPS ISA. The resulting kernel binary is, at a minimum,
20% smaller than using the MIPS32R2 ISA.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Disable LL/SC and fix linker bug.
Steven J. Hill [Mon, 25 Mar 2013 18:22:59 +0000 (13:22 -0500)] 
MIPS: microMIPS: Disable LL/SC and fix linker bug.

Partially revert commit e0c14a260d66ba35935600d6435940a566fe806b
and turn off LL/SC when building a pure microMIPS kernel. This is
a temporary fix until the cmpxchg assembly macro functions are
re-written to not use the HI/LO registers in address calculations.

Also add .insn in selected user access functions which would
otherwise produce ISA mode jump incompatibilities. This is also a
temporary fix.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Add vdso support.
Douglas Leung [Mon, 25 Mar 2013 18:21:11 +0000 (13:21 -0500)] 
MIPS: microMIPS: Add vdso support.

Support vdso in microMIPS mode.

Signed-off-by: Douglas Leung <Douglas.Leung@imgtec.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Add unaligned access support.
Leonid Yegoshin [Mon, 25 Mar 2013 18:18:07 +0000 (13:18 -0500)] 
MIPS: microMIPS: Add unaligned access support.

Add logic needed to handle unaligned accesses in microMIPS mode.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
11 years agoMIPS: microMIPS: Support handling of delay slots.
Leonid Yegoshin [Mon, 25 Mar 2013 18:08:40 +0000 (13:08 -0500)] 
MIPS: microMIPS: Support handling of delay slots.

Add logic needed to properly calculate exceptions for delay slots
when in microMIPS mode.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Add support for exception handling.
Steven J. Hill [Mon, 25 Mar 2013 17:15:55 +0000 (12:15 -0500)] 
MIPS: microMIPS: Add support for exception handling.

All exceptions must be taken in microMIPS mode, never in classic
MIPS mode or the kernel falls apart. A few NOP instructions are
used to maintain the correct alignment of microMIPS versions of
the exception vectors.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Floating point support.
Leonid Yegoshin [Mon, 25 Mar 2013 17:09:02 +0000 (12:09 -0500)] 
MIPS: microMIPS: Floating point support.

Add logic needed to do floating point emulation in microMIPS mode.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Steven J. Hill <Steven. Hill@imgtec.com>
11 years agoMIPS: microMIPS: Fix macro naming in micro-assembler.
Steven J. Hill [Mon, 25 Mar 2013 17:03:41 +0000 (12:03 -0500)] 
MIPS: microMIPS: Fix macro naming in micro-assembler.

The macros did not properly take into account the ISA that
the kernel was being compiled with. A classic MIPS kernel
will have the standard 'uasm_i_##op' macro functions with
'MM_uasm_i_##op' macro functions for the microMIPS version.
A pure microMIPS kernel will have the standard macros with
'CL_uasm_i_##op' macro functions for the classic version.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoMIPS: microMIPS: Fix incorrect mask for jump immediate.
Steven J. Hill [Mon, 25 Mar 2013 17:07:40 +0000 (12:07 -0500)] 
MIPS: microMIPS: Fix incorrect mask for jump immediate.

Jump or branch target addresses have the first bit set. The
original mask did not take this into account and will cause
a field overflow warning for the target address when a jump
immediate instruction is built.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
11 years agoKVM/MIPS32: Binary patching of select privileged instructions.
Sanjay Lal [Thu, 22 Nov 2012 02:34:16 +0000 (18:34 -0800)] 
KVM/MIPS32: Binary patching of select privileged instructions.

Currently, the following instructions are translated:
- CACHE (indexed)
- CACHE (va based): translated to a SYNCI, overkill on D-CACHE operations,
  but still much faster than a trap.
- mfc0/mtc0: the virtual COP0 registers for the guest are implemented as
  2-D array.
  [COP#][SEL] and this is mapped into the guest kernel address space @ VA 0x0.
  mfc0/mtc0 operations are transformed to load/stores.

Signed-off-by: Sanjay Lal <sanjayl@kymasys.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
11 years agoKVM/MIPS32: Do not call vcpu_load when injecting interrupts.
Sanjay Lal [Thu, 22 Nov 2012 02:34:15 +0000 (18:34 -0800)] 
KVM/MIPS32: Do not call vcpu_load when injecting interrupts.

Signed-off-by: Sanjay Lal <sanjayl@kymasys.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
11 years agoftrace: Have ftrace_regex_write() return either read or error
Steven Rostedt (Red Hat) [Thu, 9 May 2013 15:35:12 +0000 (11:35 -0400)] 
ftrace: Have ftrace_regex_write() return either read or error

As ftrace_regex_write() reads the result of ftrace_process_regex()
which can sometimes return a positive number, only consider a
failure if the return is negative. Otherwise, it will skip possible
other registered probes and by returning a positive number that
wasn't read, it will confuse the user processes doing the writing.

Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
11 years agotracing: Return error if register_ftrace_function_probe() fails for event_enable_func()
Steven Rostedt (Red Hat) [Thu, 9 May 2013 15:30:26 +0000 (11:30 -0400)] 
tracing: Return error if register_ftrace_function_probe() fails for event_enable_func()

register_ftrace_function_probe() returns the number of functions
it registered, which can be zero, it can also return a negative number
if something went wrong. But event_enable_func() only checks for
the case that it didn't register anything, it needs to also check
for the case that something went wrong and return that error code
as well.

Added some comments about the code as well, to make it more
understandable.

Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
11 years agotracing: Don't succeed if event_enable_func did not register anything
Masami Hiramatsu [Thu, 9 May 2013 05:44:14 +0000 (14:44 +0900)] 
tracing: Don't succeed if event_enable_func did not register anything

Return 0 instead of the number of activated ftrace function probes if
event_enable_func succeeded and return an error code if it failed or
did not register any functions. But it currently returns the number
of registered functions and if it didn't register anything, it returns 0,
but that is considered success.

This also fixes the return value. As if it succeeds, it returns the
number of functions that were enabled, which is returned back to
the user in ftrace_regex_write (the write() return code). If only
one function is enabled, then the return code of the write is one,
and this can confuse the user program in thinking it only wrote 1
byte.

Link: http://lkml.kernel.org/r/20130509054413.30398.55650.stgit@mhiramat-M0-7522
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
[ Rewrote change log to reflect that this fixes two bugs - SR ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
11 years agoEDAC: Don't give write permission to read-only files
Srivatsa S. Bhat [Tue, 30 Apr 2013 09:47:16 +0000 (15:17 +0530)] 
EDAC: Don't give write permission to read-only files

I get the following warning on boot:

------------[ cut here ]------------
WARNING: at drivers/base/core.c:575 device_create_file+0x9a/0xa0()
Hardware name:  -[8737R2A]-
Write permission without 'store'
...
</snip>

Drilling down, this is related to dynamic channel ce_count attribute
files sporting a S_IWUSR mode without a ->store() function. Looking
around, it appears that they aren't supposed to have a ->store()
function. So remove the bogus write permission to get rid of the
warning.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: <stable@vger.kernel.org> # 3.[89]
[ shorten commit message ]
Signed-off-by: Borislav Petkov <bp@suse.de>
11 years agobfin cache: dcplb map: add 16M dcplb map for BF60x
Steven Miao [Fri, 19 Apr 2013 10:22:21 +0000 (18:22 +0800)] 
bfin cache: dcplb map: add 16M dcplb map for BF60x

use 16M data cplb map on BF60x to avoid too much dcplb miss overhead
cleanup cplb info

Signed-off-by: Steven Miao <realmz6@gmail.com>
11 years agoKVM: emulator: emulate SALC
Paolo Bonzini [Thu, 9 May 2013 09:32:51 +0000 (11:32 +0200)] 
KVM: emulator: emulate SALC

This is an almost-undocumented instruction available in 32-bit mode.
I say "almost" undocumented because AMD documents it in their opcode
maps just to say that it is unavailable in 64-bit mode (sections
"A.2.1 One-Byte Opcodes" and "B.3 Invalid and Reassigned Instructions
in 64-Bit Mode").

It is roughly equivalent to "sbb %al, %al" except it does not
set the flags.  Use fastop to emulate it, but do not use the opcode
directly because it would fail if the host is 64-bit!

Reported-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: stable@vger.kernel.org # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoKVM: emulator: emulate XLAT
Paolo Bonzini [Thu, 9 May 2013 09:32:50 +0000 (11:32 +0200)] 
KVM: emulator: emulate XLAT

This is used by SGABIOS, KVM breaks with emulate_invalid_guest_state=1.
It is just a MOV in disguise, with a funny source address.

Reported-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: stable@vger.kernel.org # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoKVM: emulator: emulate AAM
Paolo Bonzini [Thu, 9 May 2013 09:32:49 +0000 (11:32 +0200)] 
KVM: emulator: emulate AAM

This is used by SGABIOS, KVM breaks with emulate_invalid_guest_state=1.

AAM needs the source operand to be unsigned; do the same in AAD as well
for consistency, even though it does not affect the result.

Reported-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: stable@vger.kernel.org # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoARC: [mm] refactor the core (i|d)cache line ops loops
Vineet Gupta [Thu, 9 May 2013 08:30:51 +0000 (14:00 +0530)] 
ARC: [mm] refactor the core (i|d)cache line ops loops

Nothing semantical
* simplify the alignement code by using & operation only
* rename variables clearly as paddr

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
11 years agomicroblaze: Enable IRQ in arch_cpu_idle
Michal Simek [Thu, 9 May 2013 08:32:20 +0000 (10:32 +0200)] 
microblaze: Enable IRQ in arch_cpu_idle

Microblaze requires to enable IRQ in cpu_idle loop.

It should be the part of this patch:
"microblaze: Use generic idle loop"
(sha1: e962bb9e9cf73b8c8893c95903e791dd5ec19fb4)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
11 years agoARC: [mm] serious bug in vaddr based icache flush
Vineet Gupta [Thu, 9 May 2013 08:15:12 +0000 (13:45 +0530)] 
ARC: [mm] serious bug in vaddr based icache flush

vaddr used to index the cache was clipped from the wrong end, and thus
would potentially fail to flush the correct lines.

The problem was dorment for so long because up until the recent
optimizations it was only used for ptrace break-point only flushes.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
11 years agoxtensa: Switch to asm-generic/linkage.h
Geert Uytterhoeven [Tue, 7 May 2013 09:57:33 +0000 (11:57 +0200)] 
xtensa: Switch to asm-generic/linkage.h

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
11 years agoxtensa: fix redboot load address
Chris Zankel [Thu, 9 May 2013 05:44:18 +0000 (22:44 -0700)] 
xtensa: fix redboot load address

With the patch to support MMUv3, the base address for the loaded
binary image has changed, and a fix was applied to the U-Boot image.
This fixes the RedBoot image.

Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: ISS: fix timer_lock usage in rs_open
Max Filippov [Mon, 4 Feb 2013 19:38:13 +0000 (23:38 +0400)] 
xtensa: ISS: fix timer_lock usage in rs_open

This fixes the following lockdep splat:

[   66.460000] =================================
[   66.460000] [ INFO: inconsistent lock state ]
[   66.460000] 3.9.0-rc5-00161-ga48dd49 #4 Not tainted
[   66.460000] ---------------------------------
[   66.460000] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[   66.460000] swapper/1 [HC0[0]:SC1[1]:HE1:SE0] takes:
[   66.460000]  (timer_lock){+.?...}, at: [<d0006cde>] rs_poll+0x12/0xdc
[   66.460000] {SOFTIRQ-ON-W} state was registered at:
[   66.460000]   [<d00421f0>] lock_acquire+0xec/0x13c
[   66.460000]   [<d01ea036>] _raw_spin_lock+0x3a/0x84
[   66.460000]   [<d0006c8c>] rs_open+0x18/0x58
[   66.460000]   [<d0139ea2>] tty_open+0x262/0x3cc
[   66.460000]   [<d00942e0>] chrdev_open+0x8c/0xe0
[   66.460000]   [<d00907b2>] do_dentry_open$isra$16+0x10e/0x190
[   66.460000]   [<d0091141>] finish_open+0x39/0x48
[   66.460000]   [<d009a0b4>] do_last$isra$34+0x6c4/0x824
[   66.460000]   [<d009a27a>] path_openat+0x66/0x310
[   66.460000]   [<d009a53a>] do_filp_open+0x16/0x44
[   66.460000]   [<d0091445>] do_sys_open+0xd5/0x13c
[   66.460000]   [<d00914be>] sys_open+0x12/0x18
[   66.460000]   [<d0413ffc>] kernel_init_freeable+0xe4/0x12c
[   66.460000]   [<d01e2a9c>] kernel_init+0xc/0x9c
[   66.460000]   [<d00044fc>] ret_from_kernel_thread+0x8/0xc
[   66.460000] irq event stamp: 132542
[   66.460000] hardirqs last  enabled at (132542): [<d01ea2ec>] _raw_spin_unlock_irq+0x30/0x44
[   66.460000] hardirqs last disabled at (132541): [<d01ea11e>] _raw_spin_lock_irq+0xe/0x8c
[   66.460000] softirqs last  enabled at (132234): [<d0017d32>] __do_softirq+0x216/0x2a4
[   66.460000] softirqs last disabled at (132539): [<d0018024>] irq_exit+0x38/0x40
[   66.460000]
[   66.460000] other info that might help us debug this:
[   66.460000]  Possible unsafe locking scenario:
[   66.460000]
[   66.460000]        CPU0
[   66.460000]        ----
[   66.460000]   lock(timer_lock);
[   66.460000]   <Interrupt>
[   66.460000]     lock(timer_lock);
[   66.460000]
[   66.460000]  *** DEADLOCK ***
[   66.460000]
[   66.460000] 1 lock held by swapper/1:
[   66.460000]  #0:  (((&serial_timer))){+.-...}, at: [<d001c65c>] call_timer_fn+0x0/0x1f0
[   66.460000]
Stack: d7c2fac0 00000018 00000004 00000001 d7c2faa0 00000004 00000006 d7c2fa90
       9003e87c d7c2fae0 d7c30000 d025a87c 00000001 0000000f 00000000 d7c2fac0
       9004005d d7c2fb10 d7c30000 d7c30338 00000001 00000001 00000000 d7c30338
[   66.460000] Call Trace:
[   66.460000]  [<d01e4f93>] print_usage_bug$part$26+0x1c3/0x1c8
[   66.460000]  [<d003e87c>] mark_lock+0x2b4/0x440
[   66.460000]  [<d004005d>] __lock_acquire+0x54d/0x16c4
[   66.460000]  [<d00421f0>] lock_acquire+0xec/0x13c
[   66.460000]  [<d01ea036>] _raw_spin_lock+0x3a/0x84
[   66.460000]  [<d0006cde>] rs_poll+0x12/0xdc
[   66.460000]  [<d001c71a>] call_timer_fn+0xbe/0x1f0
[   66.460000]  [<d001cd90>] run_timer_softirq+0x198/0x1f4
[   66.460000]  [<d0017c30>] __do_softirq+0x114/0x2a4
[   66.460000]  [<d0018024>] irq_exit+0x38/0x40
[   66.460000]  [<d00046c0>] do_IRQ+0x44/0x48
[   66.460000]  [<d0005c58>] do_interrupt+0x4c/0x54
[   66.460000]  [<d0003c80>] common_exception_return+0x0/0x5c
[   66.460000]  [<d006682c>] free_pcppages_bulk+0x254/0x308
[   66.460000]

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: disable IRQs while IRQ handler is running
Max Filippov [Mon, 25 Mar 2013 22:51:43 +0000 (02:51 +0400)] 
xtensa: disable IRQs while IRQ handler is running

IRQ handlers are expected to run with IRQs disabled.
See e.g. http://lwn.net/Articles/380931/ for a longer story.

This was overlooked in the commit
  2d1c645 xtensa: dispatch medium-priority interrupts
Revert to old behavior and simplify interrupt entry and exit code.
Interrupt handler still honours IRQ priority.

do_notify_resume/schedule must be called with interrupts enabled, enable
interrupts if we return from user exception.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: enable lockdep support
Max Filippov [Mon, 15 Apr 2013 05:21:35 +0000 (09:21 +0400)] 
xtensa: enable lockdep support

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: fix arch_irqs_disabled_flags implementation
Max Filippov [Sun, 31 Mar 2013 02:34:10 +0000 (06:34 +0400)] 
xtensa: fix arch_irqs_disabled_flags implementation

IRQs are disabled when PS.EXCM is set or PS.INTLEVEL is equal to or
higher than LOCKLEVEL.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: add irq flags trace support
Max Filippov [Sun, 31 Mar 2013 02:32:42 +0000 (06:32 +0400)] 
xtensa: add irq flags trace support

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: provide custom CALLER_ADDR* implementations
Max Filippov [Sun, 7 Apr 2013 21:29:19 +0000 (01:29 +0400)] 
xtensa: provide custom CALLER_ADDR* implementations

Definition of CALLER_ADDR* through __builtin_return_address makes
compiler insert calls to __xtensa_libgcc_window_spill, which in turn
makes fast_syscall_spill_registers syscall that clobbers registers when
called from the kernel mode, leading to invalid opcode exceptions on
return to userspace.

Provide definition for CALLER_ADDR0 as MAKE_PC_FROM_RA(a0, a1) and in
case CONFIG_FRAME_POINTER is enabled extract CALLER_ADDR{1-3} from
stack.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: add stacktrace support
Max Filippov [Mon, 15 Apr 2013 05:20:48 +0000 (09:20 +0400)] 
xtensa: add stacktrace support

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: clean up stpill_registers
Max Filippov [Sat, 6 Apr 2013 00:10:13 +0000 (04:10 +0400)] 
xtensa: clean up stpill_registers

- remove unused asm parameters;
- fix EXCM bit setting in the PS SR during _spill_registers call.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: don't use a7 in simcalls
Max Filippov [Mon, 15 Apr 2013 04:39:41 +0000 (08:39 +0400)] 
xtensa: don't use a7 in simcalls

To support FRAME_POINTER avoid using a7 in __simc (none of the existing
simcalls needs it). Replace calls to __simc with more specific
simc_read, simc_write and simc_lseek calls.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: don't attempt to use unconfigured timers
Max Filippov [Sun, 10 Mar 2013 08:07:14 +0000 (12:07 +0400)] 
xtensa: don't attempt to use unconfigured timers

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: provide default platform_pcibios_init implementation
Max Filippov [Sat, 30 Mar 2013 21:08:22 +0000 (01:08 +0400)] 
xtensa: provide default platform_pcibios_init implementation

This fixes the following build error:

  arch/xtensa/kernel/built-in.o:(.init.literal+0xe8): undefined reference
to `platform_pcibios_init'
  arch/xtensa/kernel/built-in.o: In function `setup_arch':
  (.init.text+0x20e): undefined reference to `platform_pcibios_init'

and allows platform to omit definition of platform_pcibios_init if it's
empty.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: remove KCORE_ELF again
Paul Bolle [Fri, 22 Mar 2013 00:40:51 +0000 (01:40 +0100)] 
xtensa: remove KCORE_ELF again

The Kconfig symbol KCORE_ELF was removed in v2.6.0, but reappeared in two
architectures. It is useless. Remove it again.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: document MMUv3 setup sequence
Max Filippov [Mon, 4 Mar 2013 19:48:14 +0000 (23:48 +0400)] 
xtensa: document MMUv3 setup sequence

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: add MMU v3 support
Max Filippov [Mon, 3 Dec 2012 11:01:43 +0000 (15:01 +0400)] 
xtensa: add MMU v3 support

MMUv3 comes out of reset with identity vaddr -> paddr mapping in the TLB
way 6:

Way 6 (512 MB)
        Vaddr       Paddr       ASID  Attr RWX Cache
        ----------  ----------  ----  ---- --- -------
        0x00000000  0x00000000  0x01  0x03 RWX Bypass
        0x20000000  0x20000000  0x01  0x03 RWX Bypass
        0x40000000  0x40000000  0x01  0x03 RWX Bypass
        0x60000000  0x60000000  0x01  0x03 RWX Bypass
        0x80000000  0x80000000  0x01  0x03 RWX Bypass
        0xa0000000  0xa0000000  0x01  0x03 RWX Bypass
        0xc0000000  0xc0000000  0x01  0x03 RWX Bypass
        0xe0000000  0xe0000000  0x01  0x03 RWX Bypass

This patch adds remapping code at the reset vector or at the kernel
_start (depending on CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) that
reconfigures MMUv3 as MMUv2:

Way 5 (128 MB)
        Vaddr       Paddr       ASID  Attr RWX Cache
        ----------  ----------  ----  ---- --- -------
        0xd0000000  0x00000000  0x01  0x07 RWX WB
        0xd8000000  0x00000000  0x01  0x03 RWX Bypass
Way 6 (256 MB)
        Vaddr       Paddr       ASID  Attr RWX Cache
        ----------  ----------  ----  ---- --- -------
        0xe0000000  0xf0000000  0x01  0x07 RWX WB
        0xf0000000  0xf0000000  0x01  0x03 RWX Bypass

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: fix ibreakenable register update
Max Filippov [Sun, 3 Mar 2013 23:40:42 +0000 (03:40 +0400)] 
xtensa: fix ibreakenable register update

Only set the register when there is at least one ibreak register,
otherwise the build fails:
arch/xtensa/kernel/head.S:105: Error: invalid register 'ibreakenable'
for 'wsr' instruction
arch/xtensa/platforms/iss/setup.c:67: Error: invalid register
'ibreakenable' for 'wsr' instruction

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agoxtensa: fix oprofile building as module
Max Filippov [Mon, 25 Feb 2013 15:01:33 +0000 (19:01 +0400)] 
xtensa: fix oprofile building as module

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
11 years agomicroblaze: Fix uaccess_ok macro
Michal Simek [Thu, 28 Mar 2013 15:42:44 +0000 (16:42 +0100)] 
microblaze: Fix uaccess_ok macro

Fix access_ok macro no to permit
case where user will try to access
the last address space which is equal
to segment address.

Example:
segment addr = 0xbfff ffff
address = 0xbfff fff0
size = 0x10

Current wrong implementation
0xbfff ffff >= (0xbfff fff0 | 0x10 | (0xbfff fff0 + 0x10))
0xbfff ffff >= (0xbfff fff0        | 0xc000 0000)
0xbfff ffff >= 0xf000 0000
return 0 which is access failed even the combination is valid.
because get_fs().seq returns the last valid address.

This patch fix this problem.

Size equals to zero is valid access.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
11 years agomicroblaze: Add support for new cpu versions and target architecture
Michal Simek [Wed, 19 Dec 2012 09:52:19 +0000 (10:52 +0100)] 
microblaze: Add support for new cpu versions and target architecture

Update PVR values based on reference manual.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
11 years agomicroblaze: Do not select OPT_LIB_ASM by default
Michal Simek [Fri, 3 May 2013 07:29:28 +0000 (09:29 +0200)] 
microblaze: Do not select OPT_LIB_ASM by default

This option is valid only for BE systems.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
11 years agomicroblaze: Fix initrd support
Michal Simek [Thu, 2 May 2013 13:53:51 +0000 (15:53 +0200)] 
microblaze: Fix initrd support

Initrd/ramdisk support has been never validated.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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