Commit | Line | Data |
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49c3df6a VG |
1 | /* |
2 | * Suspend support specific for power. | |
3 | * | |
4 | * Distribute under GPLv2 | |
5 | * | |
a2531293 | 6 | * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz> |
49c3df6a VG |
7 | * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> |
8 | */ | |
9 | ||
27ac792c | 10 | #include <linux/mm.h> |
49c3df6a VG |
11 | #include <asm/page.h> |
12 | ||
13 | /* References to section boundaries */ | |
14 | extern const void __nosave_begin, __nosave_end; | |
15 | ||
16 | /* | |
17 | * pfn_is_nosave - check if given pfn is in the 'nosave' section | |
18 | */ | |
19 | ||
20 | int pfn_is_nosave(unsigned long pfn) | |
21 | { | |
22 | unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; | |
23 | unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; | |
24 | return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); | |
25 | } |