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SLUB: clean up krealloc

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We really do not need all this gaga there.

ksize gives us all the information we need to figure out if the object can
cope with the new size.

Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2007-05-09 02:32:38 -07:00 • committed by Linus Torvalds
commit 1f99a283dc
1 changed files with 4 additions and 11 deletions
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15
mm/slub.c
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@ -2199,9 +2199,8 @@ EXPORT_SYMBOL(kmem_cache_shrink);
*/
void *krealloc(const void *p, size_t new_size, gfp_t flags)
{
struct kmem_cache *new_cache;
void *ret;
struct page *page;
size_t ks;
if (unlikely(!p))
return kmalloc(new_size, flags);
@ -2211,19 +2210,13 @@ void *krealloc(const void *p, size_t new_size, gfp_t flags)
return NULL;
}
page = virt_to_head_page(p);
new_cache = get_slab(new_size, flags);
/*
* If new size fits in the current cache, bail out.
*/
if (likely(page->slab == new_cache))
ks = ksize(p);
if (ks >= new_size)
return (void *)p;
ret = kmalloc(new_size, flags);
if (ret) {
memcpy(ret, p, min(new_size, ksize(p)));
memcpy(ret, p, min(new_size, ks));
kfree(p);
}
return ret;