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mm: move cache_line_size() to <linux/cache.h>

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Not all architectures define cache_line_size() so as suggested by Andrew move
the private implementations in mm/slab.c and mm/slob.c to <linux/cache.h>.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pekka Enberg 2008-04-28 02:12:22 -07:00 committed by Linus Torvalds
parent 19fc3f0acd
commit 1b27d05b6e
4 changed files with 7 additions and 9 deletions
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3
arch/x86/Kconfig
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@ -114,6 +114,9 @@ config GENERIC_TIME_VSYSCALL
config ARCH_HAS_CPU_RELAX
def_bool y
config ARCH_HAS_CACHE_LINE_SIZE
def_bool y
config HAVE_SETUP_PER_CPU_AREA
def_bool X86_64 || (X86_SMP && !X86_VOYAGER)

4
include/linux/cache.h
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@ -60,4 +60,8 @@
#endif
#endif
#ifndef CONFIG_ARCH_HAS_CACHE_LINE_SIZE
#define cache_line_size() L1_CACHE_BYTES
#endif
#endif /* __LINUX_CACHE_H */

4
mm/slab.c
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@ -139,10 +139,6 @@
#define BYTES_PER_WORD sizeof(void *)
#define REDZONE_ALIGN max(BYTES_PER_WORD, __alignof__(unsigned long long))
#ifndef cache_line_size
#define cache_line_size() L1_CACHE_BYTES
#endif
#ifndef ARCH_KMALLOC_MINALIGN
/*
* Enforce a minimum alignment for the kmalloc caches.

5
mm/slub.c
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@ -207,11 +207,6 @@ static inline void ClearSlabDebug(struct page *page)
#define __KMALLOC_CACHE 0x20000000 /* objects freed using kfree */
#define __PAGE_ALLOC_FALLBACK 0x10000000 /* Allow fallback to page alloc */
/* Not all arches define cache_line_size */
#ifndef cache_line_size
#define cache_line_size() L1_CACHE_BYTES
#endif
static int kmem_size = sizeof(struct kmem_cache);
#ifdef CONFIG_SMP