diff options
Diffstat (limited to 'kernel/power/power.h')
| -rw-r--r-- | kernel/power/power.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index a3e47cbdaf3..34b43542785 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -14,8 +14,18 @@ struct swsusp_info { #ifdef CONFIG_SOFTWARE_SUSPEND -extern int pm_suspend_disk(void); +/* + * Keep some memory free so that I/O operations can succeed without paging + * [Might this be more than 4 MB?] + */ +#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT) +/* + * Keep 1 MB of memory free so that device drivers can allocate some pages in + * their .suspend() routines without breaking the suspend to disk. + */ +#define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT) +extern int pm_suspend_disk(void); #else static inline int pm_suspend_disk(void) { |