tree cff9506eec5e4008004a913acf8f58d85eae6de6
parent af11c397fd8835c70ec0bb777104e4ab98b2d660
author NeilBrown <neilb@suse.de> 1245278982 +1000
committer NeilBrown <neilb@suse.de> 1245278982 +1000

md/linear: use call_rcu to free obsolete 'conf' structures.

Current, when we update the 'conf' structure, when adding a
drive to a linear array, we keep the old version around until
the array is finally stopped, as it is not safe to free it
immediately.

Now that we have rcu protection on all accesses to 'conf',
we can use call_rcu to free it more promptly.

Signed-off-by: NeilBrown <neilb@suse.de>