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prep_zero_page: remove bogus BUG_ON

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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: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2007-11-28 18:57:12 +00:00 committed by Linus Torvalds
parent e84e2e132c
commit 09f345da75
1 changed files with 0 additions and 1 deletions
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mm/page_alloc.c
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@ -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.