lib/stackdepot: avoid to return 0 handle

[deliverable/linux.git] / init / main.c

diff --git a/init/main.c b/init/main.c
index 58c9e374704bb20cfff41fa92afcf7cafe498c32..b3c6e363ae181b01fb5e530c2ae9b733c59c4ba4 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -93,9 +93,6 @@ static int kernel_init(void *);
 extern void init_IRQ(void);
 extern void fork_init(void);
 extern void radix_tree_init(void);
-#ifndef CONFIG_DEBUG_RODATA
-static inline void mark_rodata_ro(void) { }
-#endif
 
 /*
  * Debug helper: via this flag we know that we are in 'early bootup code'
@@ -388,7 +385,6 @@ static noinline void __init_refok rest_init(void)
        int pid;
 
        rcu_scheduler_starting();
-       smpboot_thread_init();
        /*
         * We need to spawn init first so that it obtains pid 1, however
         * the init task will end up wanting to create kthreads, which, if
@@ -452,20 +448,6 @@ void __init parse_early_param(void)
        done = 1;
 }
 
-/*
- *     Activate the first processor.
- */
-
-static void __init boot_cpu_init(void)
-{
-       int cpu = smp_processor_id();
-       /* Mark the boot cpu "present", "online" etc for SMP and UP case */
-       set_cpu_online(cpu, true);
-       set_cpu_active(cpu, true);
-       set_cpu_present(cpu, true);
-       set_cpu_possible(cpu, true);
-}
-
 void __init __weak smp_setup_processor_id(void)
 {
 }
@@ -499,11 +481,6 @@ asmlinkage __visible void __init start_kernel(void)
        char *command_line;
        char *after_dashes;
 
-       /*
-        * Need to run as early as possible, to initialize the
-        * lockdep hash:
-        */
-       lockdep_init();
        set_task_stack_end_magic(&init_task);
        smp_setup_processor_id();
        debug_objects_early_init();
@@ -530,6 +507,7 @@ asmlinkage __visible void __init start_kernel(void)
        setup_command_line(command_line);
        setup_nr_cpu_ids();
        setup_per_cpu_areas();
+       boot_cpu_state_init();
        smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
 
        build_all_zonelists(NULL, NULL);
@@ -727,7 +705,6 @@ static int __init initcall_blacklist(char *str)
 
 static bool __init_or_module initcall_blacklisted(initcall_t fn)
 {
-       struct list_head *tmp;
        struct blacklist_entry *entry;
        char *fn_name;
 
@@ -735,8 +712,7 @@ static bool __init_or_module initcall_blacklisted(initcall_t fn)
        if (!fn_name)
                return false;
 
-       list_for_each(tmp, &blacklisted_initcalls) {
-               entry = list_entry(tmp, struct blacklist_entry, next);
+       list_for_each_entry(entry, &blacklisted_initcalls, next) {
                if (!strcmp(fn_name, entry->buf)) {
                        pr_debug("initcall %s blacklisted\n", fn_name);
                        kfree(fn_name);
@@ -929,6 +905,28 @@ static int try_to_run_init_process(const char *init_filename)
 
 static noinline void __init kernel_init_freeable(void);
 
+#ifdef CONFIG_DEBUG_RODATA
+static bool rodata_enabled = true;
+static int __init set_debug_rodata(char *str)
+{
+       return strtobool(str, &rodata_enabled);
+}
+__setup("rodata=", set_debug_rodata);
+
+static void mark_readonly(void)
+{
+       if (rodata_enabled)
+               mark_rodata_ro();
+       else
+               pr_info("Kernel memory protection disabled.\n");
+}
+#else
+static inline void mark_readonly(void)
+{
+       pr_warn("This architecture does not have kernel memory protection.\n");
+}
+#endif
+
 static int __ref kernel_init(void *unused)
 {
        int ret;
@@ -937,7 +935,7 @@ static int __ref kernel_init(void *unused)
        /* need to finish all async __init code before freeing the memory */
        async_synchronize_full();
        free_initmem();
-       mark_rodata_ro();
+       mark_readonly();
        system_state = SYSTEM_RUNNING;
        numa_default_policy();