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crypto: scatterwalk - Avoid flush_dcache_page on slab pages

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It's illegal to call flush_dcache_page on slab pages on a number
of architectures.  So this patch avoids doing so if PageSlab is
true.

In future we can move the flush_dcache_page call to those page
cache users that actually need it.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2009-02-09 14:22:14 +11:00
parent 412e87ae5d
commit 4f3e797ad0
1 changed files with 2 additions and 1 deletions
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crypto/scatterwalk.c
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@ -54,6 +54,7 @@ static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
struct page *page;
page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);
if (!PageSlab(page))
flush_dcache_page(page);
}