[RFC PATCH V2 5/9] slab: use slab_post_alloc_hook in SLAB allocator

[Jesper Dangaard Brouer <brouer@redhat.com>]

Reviewers notice that the order in slab_post_alloc_hook() of
kmemcheck_slab_alloc() and kmemleak_alloc_recursive() gets
swapped compared to slab.c.

Also notice memset now occurs before calling kmemcheck_slab_alloc()
and kmemleak_alloc_recursive().

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
 mm/slab.c |   22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 17fd6268ad41..47e7bcab8c3b 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3172,16 +3172,11 @@ slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
   out:
 	local_irq_restore(save_flags);
 	ptr = cache_alloc_debugcheck_after(cachep, flags, ptr, caller);
-	kmemleak_alloc_recursive(ptr, cachep->object_size, 1, cachep->flags,
-				 flags);
 
-	if (likely(ptr)) {
-		kmemcheck_slab_alloc(cachep, flags, ptr, cachep->object_size);
-		if (unlikely(flags & __GFP_ZERO))
-			memset(ptr, 0, cachep->object_size);
-	}
+	if (unlikely(flags & __GFP_ZERO) && ptr)
+		memset(ptr, 0, cachep->object_size);
 
-	memcg_kmem_put_cache(cachep);
+	slab_post_alloc_hook(cachep, flags, 1, &ptr);
 	return ptr;
 }
 
@@ -3232,17 +3227,12 @@ slab_alloc(struct kmem_cache *cachep, gfp_t flags, unsigned long caller)
 	objp = __do_cache_alloc(cachep, flags);
 	local_irq_restore(save_flags);
 	objp = cache_alloc_debugcheck_after(cachep, flags, objp, caller);
-	kmemleak_alloc_recursive(objp, cachep->object_size, 1, cachep->flags,
-				 flags);
 	prefetchw(objp);
 
-	if (likely(objp)) {
-		kmemcheck_slab_alloc(cachep, flags, objp, cachep->object_size);
-		if (unlikely(flags & __GFP_ZERO))
-			memset(objp, 0, cachep->object_size);
-	}
+	if (unlikely(flags & __GFP_ZERO) && objp)
+		memset(objp, 0, cachep->object_size);
 
-	memcg_kmem_put_cache(cachep);
+	slab_post_alloc_hook(cachep, flags, 1, &objp);
 	return objp;
 }
 

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