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SLUB: Do not use length parameter in slab_alloc()

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We can get to the length of the object through the kmem_cache_structure.  The
additional parameter does no good and causes the compiler to generate bad
code.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2007-07-17 04:03:28 -07:00 committed by Linus Torvalds
parent 12ad6843dd
commit ce15fea827
1 changed files with 9 additions and 11 deletions
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20
mm/slub.c
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@ -1541,7 +1541,7 @@ debug:
* Otherwise we can simply pick the next object from the lockless free list. * Otherwise we can simply pick the next object from the lockless free list.
*/ */
static void __always_inline *slab_alloc(struct kmem_cache *s, static void __always_inline *slab_alloc(struct kmem_cache *s,
gfp_t gfpflags, int node, void *addr, int length) gfp_t gfpflags, int node, void *addr)
{ {
struct page *page; struct page *page;
void **object; void **object;
@ -1561,23 +1561,21 @@ static void __always_inline *slab_alloc(struct kmem_cache *s,
local_irq_restore(flags); local_irq_restore(flags);
if (unlikely((gfpflags & __GFP_ZERO) && object)) if (unlikely((gfpflags & __GFP_ZERO) && object))
memset(object, 0, length); memset(object, 0, s->objsize);
return object; return object;
} }
void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
{ {
return slab_alloc(s, gfpflags, -1, return slab_alloc(s, gfpflags, -1, __builtin_return_address(0));
__builtin_return_address(0), s->objsize);
} }
EXPORT_SYMBOL(kmem_cache_alloc); EXPORT_SYMBOL(kmem_cache_alloc);
#ifdef CONFIG_NUMA #ifdef CONFIG_NUMA
void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node) void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
{ {
return slab_alloc(s, gfpflags, node, return slab_alloc(s, gfpflags, node, __builtin_return_address(0));
__builtin_return_address(0), s->objsize);
} }
EXPORT_SYMBOL(kmem_cache_alloc_node); EXPORT_SYMBOL(kmem_cache_alloc_node);
#endif #endif
@ -2369,7 +2367,7 @@ void *__kmalloc(size_t size, gfp_t flags)
if (ZERO_OR_NULL_PTR(s)) if (ZERO_OR_NULL_PTR(s))
return s; return s;
return slab_alloc(s, flags, -1, __builtin_return_address(0), size); return slab_alloc(s, flags, -1, __builtin_return_address(0));
} }
EXPORT_SYMBOL(__kmalloc); EXPORT_SYMBOL(__kmalloc);
@ -2381,7 +2379,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
if (ZERO_OR_NULL_PTR(s)) if (ZERO_OR_NULL_PTR(s))
return s; return s;
return slab_alloc(s, flags, node, __builtin_return_address(0), size); return slab_alloc(s, flags, node, __builtin_return_address(0));
} }
EXPORT_SYMBOL(__kmalloc_node); EXPORT_SYMBOL(__kmalloc_node);
#endif #endif
@ -2712,7 +2710,7 @@ void *kmem_cache_zalloc(struct kmem_cache *s, gfp_t flags)
{ {
void *x; void *x;
x = slab_alloc(s, flags, -1, __builtin_return_address(0), 0); x = slab_alloc(s, flags, -1, __builtin_return_address(0));
if (x) if (x)
memset(x, 0, s->objsize); memset(x, 0, s->objsize);
return x; return x;
@ -2762,7 +2760,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, void *caller)
if (ZERO_OR_NULL_PTR(s)) if (ZERO_OR_NULL_PTR(s))
return s; return s;
return slab_alloc(s, gfpflags, -1, caller, size); return slab_alloc(s, gfpflags, -1, caller);
} }
void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags, void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
@ -2773,7 +2771,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
if (ZERO_OR_NULL_PTR(s)) if (ZERO_OR_NULL_PTR(s))
return s; return s;
return slab_alloc(s, gfpflags, node, caller, size); return slab_alloc(s, gfpflags, node, caller);
} }
#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG) #if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)