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Slab allocators: Replace explicit zeroing with __GFP_ZERO

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kmalloc_node() and kmem_cache_alloc_node() were not available in a zeroing
variant in the past.  But with __GFP_ZERO it is possible now to do zeroing
while allocating.

Use __GFP_ZERO to remove the explicit clearing of memory via memset whereever
we can.

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 2007-07-17 04:03:29 -07:00 • committed by Linus Torvalds
commit 94f6030ca7
12 changed files with 30 additions and 38 deletions
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6
mm/vmalloc.c
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@ -432,11 +432,12 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
area->nr_pages = nr_pages;
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
pages = __vmalloc_node(array_size, gfp_mask, PAGE_KERNEL, node);
pages = __vmalloc_node(array_size, gfp_mask | __GFP_ZERO,
PAGE_KERNEL, node);
area->flags |= VM_VPAGES;
} else {
pages = kmalloc_node(array_size,
(gfp_mask & GFP_LEVEL_MASK),
(gfp_mask & GFP_LEVEL_MASK) | __GFP_ZERO,
node);
}
area->pages = pages;
@ -445,7 +446,6 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
kfree(area);
return NULL;
}
memset(area->pages, 0, array_size);
for (i = 0; i < area->nr_pages; i++) {
if (node < 0)