tree 49f758f1f46ceb9bbab9bdaa40117030f031a0b8
parent 82e5a1718b9d0401b826341b9023766d04cb82f2
author NeilBrown <neilb@suse.de> 1311644119 +1000
committer NeilBrown <neilb@suse.de> 1311644119 +1000

md/raid5: unify stripe_head_state and r6_state

'struct stripe_head_state' stores state about the 'current' stripe
that is passed around while handling the stripe.
For RAID6 there is an extension structure: r6_state, which is also
passed around.
There is no value in keeping these separate, so move the fields from
the latter into the former.

This means that all code now needs to treat s->failed_num as an small
array, but this is a small cost.

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Namhyung Kim <namhyung@gmail.com>