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mm, highmem: use PKMAP_NR() to calculate an index of pkmap

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To calculate an index of pkmap, using PKMAP_NR() is more understandable
and maintainable, so change it.

Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2012-12-11 16:01:17 -08:00 committed by Linus Torvalds
parent 6555bc0357
commit 4de22c0584
1 changed files with 1 additions and 1 deletions
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2
mm/highmem.c
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@ -99,7 +99,7 @@ struct page *kmap_to_page(void *vaddr)
unsigned long addr = (unsigned long)vaddr; unsigned long addr = (unsigned long)vaddr;
if (addr >= PKMAP_ADDR(0) && addr < PKMAP_ADDR(LAST_PKMAP)) { if (addr >= PKMAP_ADDR(0) && addr < PKMAP_ADDR(LAST_PKMAP)) {
int i = (addr - PKMAP_ADDR(0)) >> PAGE_SHIFT; int i = PKMAP_NR(addr);
return pte_page(pkmap_page_table[i]); return pte_page(pkmap_page_table[i]);
} }