[PATCH] fold me "mm: introduce memalloc_nofs_{save,restore} API"

[Michal Hocko]

Lockdep infrastructure is hooked into early hot paths of the allocator
so __lockdep_trace_alloc has to check for PF_MEMALLOC_NOFS directly and
do not rely on current_gfp_context

Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>

---
 kernel/locking/lockdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 716547fdb873..f60124d0871c 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2750,7 +2750,7 @@ static void __lockdep_trace_alloc(gfp_t gfp_mask, unsigned long flags)
 		return;
 
 	/* We're only interested __GFP_FS allocations for now */
-	if (!(gfp_mask & __GFP_FS))
+	if (!(gfp_mask & __GFP_FS) || (curr->flags & PF_MEMALLOC_NOFS))
 		return;
 
 	/*
-- 
2.8.0.rc3

-- 
Michal Hocko
SUSE Labs