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authorDan Williams <dan.j.williams@intel.com>2009-03-31 08:09:39 +0400
committerNeilBrown <neilb@suse.de>2009-03-31 08:09:39 +0400
commitf701d589aa34d7531183c9ac6f7713ba14212b02 (patch)
treed388cd7fa54c520f12233470a35ebb0676677e7a /drivers/md/raid5.h
parent18b0033491f584a2d79697da714b1ef9d6b27d22 (diff)
downloadlinux-f701d589aa34d7531183c9ac6f7713ba14212b02.tar.xz
md/raid6: move raid6 data processing to raid6_pq.ko
Move the raid6 data processing routines into a standalone module (raid6_pq) to prepare them to be called from async_tx wrappers and other non-md drivers/modules. This precludes a circular dependency of raid456 needing the async modules for data processing while those modules in turn depend on raid456 for the base level synchronous raid6 routines. To support this move: 1/ The exportable definitions in raid6.h move to include/linux/raid/pq.h 2/ The raid6_call, recovery calls, and table symbols are exported 3/ Extra #ifdef __KERNEL__ statements to enable the userspace raid6test to compile Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid5.h')
-rw-r--r--drivers/md/raid5.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index c172371481c7..2934ee0a39c6 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -269,6 +269,8 @@ struct r6_state {
#define READ_MODIFY_WRITE 2
/* not a write method, but a compute_parity mode */
#define CHECK_PARITY 3
+/* Additional compute_parity mode -- updates the parity w/o LOCKING */
+#define UPDATE_PARITY 4
/*
* Stripe state