linux-kernel - [patch 5/6] slab: avoid compiling SLAB_CACHE

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Date:	Tue, 24 May 2011 16:53:55 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Pekka Enberg <penberg@...nel.org>
cc:	Christoph Lameter <cl@...ux.com>, linux-kernel@...r.kernel.org
Subject: [patch 5/6] slab: avoid compiling SLAB_CACHE_DMA without DMA
 support

If CONFIG_ZONE_DMA is disabled, SLAB_CACHE_DMA is a no-op.  Avoid
compiling support for it on such a configuration.

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 mm/slab.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -153,14 +153,18 @@
 #if DEBUG
 # define CREATE_MASK	(SLAB_RED_ZONE | \
 			 SLAB_POISON | SLAB_HWCACHE_ALIGN | \
+# ifdef CONFIG_ZONE_DMA
 			 SLAB_CACHE_DMA | \
+# endif
 			 SLAB_STORE_USER | \
 			 SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
 			 SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
 			 SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK)
 #else
 # define CREATE_MASK	(SLAB_HWCACHE_ALIGN | \
+# ifdef CONFIG_ZONE_DMA
 			 SLAB_CACHE_DMA | \
+# endif
 			 SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
 			 SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
 			 SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK)
--
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