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authorJohannes Berg <johannes@sipsolutions.net>2007-05-08 19:23:49 +1000
committerPaul Mackerras <paulus@samba.org>2007-05-09 16:34:56 +1000
commit940d67f6b95166475ff6e600ef7658e1cd441278 (patch)
tree390f7e30228ae2f22d0009831f80fb909df1e177
parentde372ecd80a42c4fb485c7232475301a18d05184 (diff)
[POWERPC] swsusp: Introduce register_nosave_region_late
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>
-rw-r--r--include/linux/suspend.h11
-rw-r--r--kernel/power/snapshot.c12
2 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 9d2aa1a12aa0..1f2f7ba9e709 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -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) {}
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index b7039772b05c..59fb89ba9a4d 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -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);