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authorRafael J. Wysocki <rjw@sisk.pl>2007-05-06 14:50:43 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:12:59 -0700
commit74dfd666de861c97d47bdbd892f6d21b801d0247 (patch)
tree7200946212cf546f4e5fac31db3dc97dbb144300 /kernel/power/power.h
parent7be9823491ecbaf9700d7d3502cb4b4dd0ed868a (diff)
swsusp: do not use page flags
Make swsusp use memory bitmaps instead of page flags for marking 'nosave' and free pages. This allows us to 'recycle' two page flags that can be used for other purposes. Also, the memory needed to store the bitmaps is allocated when necessary (ie. before the suspend) and freed after the resume which is more reasonable. The patch is designed to minimize the amount of changes and there are some nice simplifications and optimizations possible on top of it. I am going to implement them separately in the future. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/power/power.h')
-rw-r--r--kernel/power/power.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 33bd94ceba3..1f8052bda0f 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -48,6 +48,8 @@ extern sector_t swsusp_resume_block;
extern asmlinkage int swsusp_arch_suspend(void);
extern asmlinkage int swsusp_arch_resume(void);
+extern int create_basic_memory_bitmaps(void);
+extern void free_basic_memory_bitmaps(void);
extern unsigned int count_data_pages(void);
/**