tree f50dbda1faae2962fdd8c6517d4bc65d3c168862
parent f0ca340cd20b350eab8288974e9a6077900846e8
author NeilBrown <neilb@suse.de> 1138919285 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1138921632 -0800

[PATCH] md: Don't remove bitmap from md array when switching to read-only

While a read-only array doesn't not really need a bitmap, we should
not remove the bitmap when switching an array to read-only because
 a/ There is no code to re-add the bitmap which switching to read-write,
 b/ There is insufficient locking - the bitmap could be accessed while it is
    being removed.

Cc: Reuben Farrelly <reuben-lkml@reub.net>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>