linux-kernel - Re: linux-next: Tree for August 25 (mm/slub)

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Date:	Wed, 25 Aug 2010 14:07:16 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
cc:	Stephen Rothwell <sfr@...b.auug.org.au>, linux-mm@...ck.org,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: linux-next: Tree for August 25 (mm/slub)

On Wed, 25 Aug 2010, Randy Dunlap wrote:

> mm/slub.c:1732: error: implicit declaration of function 'slab_pre_alloc_hook'
> mm/slub.c:1751: error: implicit declaration of function 'slab_post_alloc_hook'
> mm/slub.c:1881: error: implicit declaration of function 'slab_free_hook'
> mm/slub.c:1886: error: implicit declaration of function 'slab_free_hook_irq'

Empty functions are missing if the runtime debuggability option is
compiled
out.


Subject: slub: Add dummy functions for the !SLUB_DEBUG case

Provide the fall back functions to empty hooks if SLUB_DEBUG is not set.

Signed-off-by: Christoph Lameter <cl@...ux.com>

---
 mm/slub.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2010-08-25 14:02:43.000000000 -0500
+++ linux-2.6/mm/slub.c	2010-08-25 14:04:23.000000000 -0500
@@ -1098,6 +1098,18 @@ static inline void inc_slabs_node(struct
 							int objects) {}
 static inline void dec_slabs_node(struct kmem_cache *s, int node,
 							int objects) {}
+
+static inline int slab_pre_alloc_hook(struct kmem_cache *s, gfp_t flags)
+							{ return 0; }
+
+static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags,
+		void *object) {}
+
+static inline void slab_free_hook(struct kmem_cache *s, void *x) {}
+
+static inline void slab_free_hook_irq(struct kmem_cache *s,
+		void *object) {}
+
 #endif

 /*
--
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