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-rw-r--r--mm/page_alloc.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e4092704c1a..ff7e1587239 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -104,19 +104,24 @@ gfp_t gfp_allowed_mask __read_mostly = GFP_BOOT_MASK;
* only be modified with pm_mutex held, unless the suspend/hibernate code is
* guaranteed not to run in parallel with that modification).
*/
-void set_gfp_allowed_mask(gfp_t mask)
+
+static gfp_t saved_gfp_mask;
+
+void pm_restore_gfp_mask(void)
{
WARN_ON(!mutex_is_locked(&pm_mutex));
- gfp_allowed_mask = mask;
+ if (saved_gfp_mask) {
+ gfp_allowed_mask = saved_gfp_mask;
+ saved_gfp_mask = 0;
+ }
}
-gfp_t clear_gfp_allowed_mask(gfp_t mask)
+void pm_restrict_gfp_mask(void)
{
- gfp_t ret = gfp_allowed_mask;
-
WARN_ON(!mutex_is_locked(&pm_mutex));
- gfp_allowed_mask &= ~mask;
- return ret;
+ WARN_ON(saved_gfp_mask);
+ saved_gfp_mask = gfp_allowed_mask;
+ gfp_allowed_mask &= ~GFP_IOFS;
}
#endif /* CONFIG_PM_SLEEP */