tree 893228041dfcc44a216a6887e75c2424e0a8bca9
parent 31b65a0d3894566191b91fbadd122c354a363b5d
author NeilBrown <neilb@suse.de> 1152531855 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1152563056 -0700

[PATCH] md: delay starting md threads until array is completely setup

When an array is started we start one or two threads (two if there is a
reshape or recovery that needs to be completed).

We currently start these *before* the array is completely set up and in
particular before queue->queuedata is set.  If the thread actually starts
very quickly on another CPU, we can end up dereferencing queue->queuedata
and oops.

This patch also makes sure we don't try to start a recovery if a reshape is
being restarted.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>