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mm, highmem: use PKMAP_NR() to calculate an index of pkmap
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>
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@ -99,7 +99,7 @@ struct page *kmap_to_page(void *vaddr)
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unsigned long addr = (unsigned long)vaddr;
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if (addr >= PKMAP_ADDR(0) && addr < PKMAP_ADDR(LAST_PKMAP)) {
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int i = (addr - PKMAP_ADDR(0)) >> PAGE_SHIFT;
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int i = PKMAP_NR(addr);
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return pte_page(pkmap_page_table[i]);
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}
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