From fab9963a69dbd71304357dbfe4ec5345f14cebdd Mon Sep 17 00:00:00 2001
From: Jesper Dangaard Brouer <brouer@redhat.com>
Date: Tue, 15 Mar 2016 14:53:38 -0700
Subject: mm: fault-inject take over bootstrap kmem_cache check

Remove the SLAB specific function slab_should_failslab(), by moving the
check against fault-injection for the bootstrap slab, into the shared
function should_failslab() (used by both SLAB and SLUB).

This is a step towards sharing alloc_hook's between SLUB and SLAB.

This bootstrap slab "kmem_cache" is used for allocating struct
kmem_cache objects to the allocator itself.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/slab.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

(limited to 'mm/slab.c')

diff --git a/mm/slab.c b/mm/slab.c
index 621fbcb35a36..95f344d79453 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2926,14 +2926,6 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
 #define cache_alloc_debugcheck_after(a,b,objp,d) (objp)
 #endif
 
-static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
-{
-	if (unlikely(cachep == kmem_cache))
-		return false;
-
-	return should_failslab(cachep->object_size, flags, cachep->flags);
-}
-
 static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
 {
 	void *objp;
@@ -3155,7 +3147,7 @@ slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
 
 	lockdep_trace_alloc(flags);
 
-	if (slab_should_failslab(cachep, flags))
+	if (should_failslab(cachep, flags))
 		return NULL;
 
 	cachep = memcg_kmem_get_cache(cachep, flags);
@@ -3243,7 +3235,7 @@ slab_alloc(struct kmem_cache *cachep, gfp_t flags, unsigned long caller)
 
 	lockdep_trace_alloc(flags);
 
-	if (slab_should_failslab(cachep, flags))
+	if (should_failslab(cachep, flags))
 		return NULL;
 
 	cachep = memcg_kmem_get_cache(cachep, flags);
-- 
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