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libata: don't flush dcache on slab pages 

page_mapping() check this via VM_BUG_ON(PageSlab(page)) so we bug here
with the according debuging turned on.

Future TODO: replace this with a flush_dcache_page_for_pio() API

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: stable@kernel.org
This commit is contained in:
Sebastian Andrzej Siewior 2010-03-21 22:52:23 +01:00 committed by Jeff Garzik
parent 276a47a93d
commit 3842e83549
1 changed files with 1 additions and 1 deletions
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2
drivers/ata/libata-sff.c
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@ -919,7 +919,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
do_write);
}
if (!do_write)
if (!do_write && !PageSlab(page))
flush_dcache_page(page);
qc->curbytes += qc->sect_size;