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Commit 09f345da authored by Hugh Dickins's avatar Hugh Dickins Committed by Linus Torvalds
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prep_zero_page: remove bogus BUG_ON 



2.6.11 gave __GFP_ZERO's prep_zero_page a bogus "highmem may have to wait"
assertion.  Presumably added under the misconception that clear_highpage
uses nonatomic kmap; but then and now it uses kmap_atomic, so no problem.

Signed-off-by: default avatarHugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e84e2e13

mm/page_alloc.c

+0 −1
Original line number Diff line number Diff line
@@ -305,7 +305,6 @@ static inline void prep_zero_page(struct page *page, int order, gfp_t gfp_flags) 
{

	int i;



	VM_BUG_ON((gfp_flags & (__GFP_WAIT | __GFP_HIGHMEM)) == __GFP_HIGHMEM);

	/*

	 * clear_highpage() will use KM_USER0, so it's a bug to use __GFP_ZERO

	 * and __GFP_HIGHMEM from hard or soft interrupt context.