linux-kernel - [patch 4/6] slub: avoid compiling SLAB_CACHE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 24 May 2011 16:53:52 -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 4/6] slub: 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/slub.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -162,7 +162,10 @@ static inline int kmem_cache_debug(struct kmem_cache *s)
 		SLAB_FAILSLAB)
 
 #define SLUB_MERGE_SAME (SLAB_DEBUG_FREE | SLAB_RECLAIM_ACCOUNT | \
-		SLAB_CACHE_DMA | SLAB_NOTRACK)
+# ifdef CONFIG_ZONE_DMA
+		SLAB_CACHE_DMA | \
+# endif
+		SLAB_NOTRACK)
 
 #define OO_SHIFT	16
 #define OO_MASK		((1 << OO_SHIFT) - 1)
@@ -2544,8 +2547,10 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order)
 	if (order)
 		s->allocflags |= __GFP_COMP;
 
+#ifdef CONFIG_ZONE_DMA
 	if (s->flags & SLAB_CACHE_DMA)
 		s->allocflags |= SLUB_DMA;
+#endif
 
 	if (s->flags & SLAB_RECLAIM_ACCOUNT)
 		s->allocflags |= __GFP_RECLAIMABLE;
@@ -4651,8 +4656,10 @@ static char *create_unique_id(struct kmem_cache *s)
 	 * are matched during merging to guarantee that the id is
 	 * unique.
 	 */
+#ifdef CONFIG_ZONE_DMA
 	if (s->flags & SLAB_CACHE_DMA)
 		*p++ = 'd';
+#endif
 	if (s->flags & SLAB_RECLAIM_ACCOUNT)
 		*p++ = 'a';
 	if (s->flags & SLAB_DEBUG_FREE)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/