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Clean up relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset

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We can optimize kernel/relay.c::relay_alloc_page_array() slightly by
using vzalloc.  The patch makes these changes:

 - use vzalloc instead of vmalloc+memset.
 - remove redundant local variable 'array'.
 - declare local 'pa_size' as const.

Cuts down nicely on both source and object-code size.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jesper Juhl 2010-11-04 21:44:41 +01:00 committed by Linus Torvalds
parent 9a8a0cadde
commit 408af87a39
1 changed files with 4 additions and 11 deletions
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15
kernel/relay.c
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@ -70,17 +70,10 @@ static const struct vm_operations_struct relay_file_mmap_ops = {
*/
static struct page **relay_alloc_page_array(unsigned int n_pages)
{
struct page **array;
size_t pa_size = n_pages * sizeof(struct page *);
if (pa_size > PAGE_SIZE) {
array = vmalloc(pa_size);
if (array)
memset(array, 0, pa_size);
} else {
array = kzalloc(pa_size, GFP_KERNEL);
}
return array;
const size_t pa_size = n_pages * sizeof(struct page *);
if (pa_size > PAGE_SIZE)
return vzalloc(pa_size);
return kzalloc(pa_size, GFP_KERNEL);
}
/*