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brd: fix cacheflushing 

brd is missing a flush_dcache_page. On 2nd thoughts, perhaps it is the
pagecache's responsibility to flush user virtual aliases (the driver of
course should flush kernel virtual mappings)... but anyway, there
already exists cache flushing for one direction of transfer, so we
should add the other.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Nick Piggin 2009-04-15 10:32:07 +02:00 committed by Jens Axboe
parent dfbc4752ea
commit c2572f2b4f
1 changed files with 3 additions and 1 deletions
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4
drivers/block/brd.c
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@ -275,8 +275,10 @@ static int brd_do_bvec(struct brd_device *brd, struct page *page,
if (rw == READ) {
copy_from_brd(mem + off, brd, sector, len);
flush_dcache_page(page);
} else
} else {
flush_dcache_page(page);
copy_to_brd(brd, mem + off, sector, len);
}
kunmap_atomic(mem, KM_USER0);
out: