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vmalloc: clean up page array indexing 

The page array is repeatedly indexed both in vunmap and vmalloc_area_node().
Add a temporary variable to make it easier to read (and easier to patch
later).

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2008-02-04 22:28:34 -08:00 committed by Linus Torvalds
parent 9e2779fa28
commit bf53d6f8fa
1 changed files with 11 additions and 5 deletions
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16
mm/vmalloc.c
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@ -384,8 +384,10 @@ static void __vunmap(const void *addr, int deallocate_pages)
int i;
for (i = 0; i < area->nr_pages; i++) {
BUG_ON(!area->pages[i]);
__free_page(area->pages[i]);
struct page *page = area->pages[i];
BUG_ON(!page);
__free_page(page);
}
if (area->flags & VM_VPAGES)
@ -489,15 +491,19 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
}
for (i = 0; i < area->nr_pages; i++) {
struct page *page;
if (node < 0)
area->pages[i] = alloc_page(gfp_mask);
page = alloc_page(gfp_mask);
else
area->pages[i] = alloc_pages_node(node, gfp_mask, 0);
if (unlikely(!area->pages[i])) {
page = alloc_pages_node(node, gfp_mask, 0);
if (unlikely(!page)) {
/* Successfully allocated i pages, free them in __vunmap() */
area->nr_pages = i;
goto fail;
}
area->pages[i] = page;
}
if (map_vm_area(area, prot, &pages))