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[PATCH] s390: enable write barriers in the dasd driver
authorStefan Weinhuber <wein@de.ibm.com>
Sun, 1 May 2005 15:58:59 +0000 (08:58 -0700)
committerLinus Torvalds <torvalds@ppc970.osdl.org>
Sun, 1 May 2005 15:58:59 +0000 (08:58 -0700)
commit6ed93c827eea181d87ce078cd1d671128c030b5a
treedf6dc11996ff5c2ec3ddf32b754d051d3ec33307tree | snapshot (tar.gz zip)
parentf24acd4503270ed4c842c8fef0b71105285e0a06commit | diff
[PATCH] s390: enable write barriers in the dasd driver

The DASD device driver never reorders the I/O requests and relies on the
hardware to write all data to nonvolatile storage before signaling a
successful write.  Hence, the only thing we have to do to support write
barriers is to set the queue ordered flag.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/s390/block/dasd.c diff | blob | blame | history