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authorChristoph Lameter <cl@linux.com>2011-06-14 16:16:36 -0500
committerPekka Enberg <penberg@kernel.org>2011-06-16 19:40:20 +0300
commit3192b920bf7d0c528ab54e7d3689f44055316a37 (patch)
treef907471f606a17cef0c1af4bc2187cdd4ee26c64 /include/linux/slab_def.h
parentbd50cfa89153a67429935a15e577a5eb5f10dd1b (diff)
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slab, slub, slob: Unify alignment definition
Every slab has its on alignment definition in include/linux/sl?b_def.h. Extract those and define a common set in include/linux/slab.h. SLOB: As notes sometimes we need double word alignment on 32 bit. This gives all structures allocated by SLOB a unsigned long long alignment like the others do. SLAB: If ARCH_SLAB_MINALIGN is not set SLAB would set ARCH_SLAB_MINALIGN to zero meaning no alignment at all. Give it the default unsigned long long alignment. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slab_def.h')
-rw-r--r--include/linux/slab_def.h26
1 files changed, 0 insertions, 26 deletions
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 83203ae..d7f6311 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -18,32 +18,6 @@
#include <trace/events/kmem.h>
/*
- * Enforce a minimum alignment for the kmalloc caches.
- * Usually, the kmalloc caches are cache_line_size() aligned, except when
- * DEBUG and FORCED_DEBUG are enabled, then they are BYTES_PER_WORD aligned.
- * Some archs want to perform DMA into kmalloc caches and need a guaranteed
- * alignment larger than the alignment of a 64-bit integer.
- * ARCH_KMALLOC_MINALIGN allows that.
- * Note that increasing this value may disable some debug features.
- */
-#ifdef ARCH_DMA_MINALIGN
-#define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN
-#else
-#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)
-#endif
-
-#ifndef ARCH_SLAB_MINALIGN
-/*
- * Enforce a minimum alignment for all caches.
- * Intended for archs that get misalignment faults even for BYTES_PER_WORD
- * aligned buffers. Includes ARCH_KMALLOC_MINALIGN.
- * If possible: Do not enable this flag for CONFIG_DEBUG_SLAB, it disables
- * some debug features.
- */
-#define ARCH_SLAB_MINALIGN 0
-#endif
-
-/*
* struct kmem_cache
*
* manages a cache.
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