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[POWERPC] swsusp: Introduce register_nosave_region_late

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This patch introduces a new register_nosave_region_late function that
can be called from initcalls when register_nosave_region can no longer
be used because it uses bootmem.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Johannes Berg 2007-05-08 19:23:49 +10:00 committed by Paul Mackerras
parent de372ecd80
commit 940d67f6b9
2 changed files with 19 additions and 4 deletions
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11
include/linux/suspend.h
View File

@ -34,13 +34,22 @@ static inline void pm_restore_console(void) {}
#if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
/* kernel/power/snapshot.c */
extern void __init register_nosave_region(unsigned long, unsigned long);
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
static inline void register_nosave_region(unsigned long b, unsigned long e)
{
__register_nosave_region(b, e, 0);
}
static inline void register_nosave_region_late(unsigned long b, unsigned long e)
{
__register_nosave_region(b, e, 1);
}
extern int swsusp_page_is_forbidden(struct page *);
extern void swsusp_set_page_free(struct page *);
extern void swsusp_unset_page_free(struct page *);
extern unsigned long get_safe_page(gfp_t gfp_mask);
#else
static inline void register_nosave_region(unsigned long b, unsigned long e) {}
static inline void register_nosave_region_late(unsigned long b, unsigned long e) {}
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
static inline void swsusp_set_page_free(struct page *p) {}
static inline void swsusp_unset_page_free(struct page *p) {}

12
kernel/power/snapshot.c
View File

@ -607,7 +607,8 @@ static LIST_HEAD(nosave_regions);
*/
void __init
register_nosave_region(unsigned long start_pfn, unsigned long end_pfn)
__register_nosave_region(unsigned long start_pfn, unsigned long end_pfn,
int use_kmalloc)
{
struct nosave_region *region;
@ -623,8 +624,13 @@ register_nosave_region(unsigned long start_pfn, unsigned long end_pfn)
goto Report;
}
}
/* This allocation cannot fail */
region = alloc_bootmem_low(sizeof(struct nosave_region));
if (use_kmalloc) {
/* during init, this shouldn't fail */
region = kmalloc(sizeof(struct nosave_region), GFP_KERNEL);
BUG_ON(!region);
} else
/* This allocation cannot fail */
region = alloc_bootmem_low(sizeof(struct nosave_region));
region->start_pfn = start_pfn;
region->end_pfn = end_pfn;
list_add_tail(&region->list, &nosave_regions);