Commit 408af87a authored by Jesper Juhl's avatar Jesper Juhl Committed by Linus Torvalds

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: 's avatarJesper Juhl <>
Acked-by: 's avatarPekka Enberg <>
Acked-by: 's avatarMathieu Desnoyers <>
Signed-off-by: 's avatarLinus Torvalds <>
parent 9a8a0cad
......@@ -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);
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