diff options
Diffstat (limited to 'include/linux/gfp.h')
| -rw-r--r-- | include/linux/gfp.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 656295865d58..91812df1351a 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -368,9 +368,25 @@ void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp); void drain_all_pages(void); void drain_local_pages(void *dummy); +/* + * gfp_allowed_mask is set to GFP_BOOT_MASK during early boot to restrict what + * GFP flags are used before interrupts are enabled. Once interrupts are + * enabled, it is set to __GFP_BITS_MASK while the system is running. During + * hibernation, it is used by PM to avoid I/O during memory allocation while + * devices are suspended. + */ extern gfp_t gfp_allowed_mask; extern void pm_restrict_gfp_mask(void); extern void pm_restore_gfp_mask(void); +#ifdef CONFIG_PM_SLEEP +extern bool pm_suspended_storage(void); +#else +static inline bool pm_suspended_storage(void) +{ + return false; +} +#endif /* CONFIG_PM_SLEEP */ + #endif /* __LINUX_GFP_H */ |