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| author | Jesper Juhl <jj@chaosbits.net> | 2010-11-04 21:44:41 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-11-05 08:21:34 -0700 |
| commit | 408af87a397a8ddef56ad39a79481f592aa1ac1a (patch) | |
| tree | b1e2aeafa2ade41e7b64a0025fa050f3be83d5c7 /kernel/relay.c | |
| parent | 9a8a0caddec7f77174a33e53f5ee9e87181b6232 (diff) | |
| download | lwn-408af87a397a8ddef56ad39a79481f592aa1ac1a.tar.gz lwn-408af87a397a8ddef56ad39a79481f592aa1ac1a.zip | |
Clean up relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset
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>
Diffstat (limited to 'kernel/relay.c')
| -rw-r--r-- | kernel/relay.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/kernel/relay.c b/kernel/relay.c index c7cf397fb929..859ea5a9605f 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -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); } /* |