[PATCH] slab: fix the debug information with different alignments.

[Giuseppe Cavallaro]

This patch is to fix the debug information reported in /proc/slab_allocators

for all the architectures by using a new define (ARCH_SLAB_MAX_DEBUG_ALIGN)
rather than the alignment of a 64-bit integer.
Currently, on sh, for example, /proc/slab_allocators has no size-X entries
as side effect.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
---
 mm/slab.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 4d00855..587e0f3 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -165,6 +165,10 @@
 #define ARCH_SLAB_MINALIGN 0
 #endif
 
+#ifndef ARCH_SLAB_MAX_DEBUG_ALIGN
+#define ARCH_SLAB_MAX_DEBUG_ALIGN __alignof__(unsigned long long)
+#endif
+
 #ifndef ARCH_KMALLOC_FLAGS
 #define ARCH_KMALLOC_FLAGS SLAB_HWCACHE_ALIGN
 #endif
@@ -2262,7 +2266,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
 		ralign = align;
 	}
 	/* disable debug if necessary */
-	if (ralign > __alignof__(unsigned long long))
+	if (ralign > ARCH_SLAB_MAX_DEBUG_ALIGN)
 		flags &= ~(SLAB_RED_ZONE | SLAB_STORE_USER);
 	/*
 	 * 4) Store it.
-- 
1.5.6.6


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