From: NeilBrown <neilb@suse.de>
Date: Fri, 26 Jan 2007 08:57:02 +0000 (-0800)
Subject: [PATCH] md: make sure the events count in an md array never returns to zero
X-Git-Tag: v2.6.20-rc7~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1031be7a5fafd3a858dfaabb74d98f9ca20744a8;p=pandora-kernel.git

[PATCH] md: make sure the events count in an md array never returns to zero

Now that we sometimes step the array events count backwards (when
transitioning dirty->clean where nothing else interesting has happened - so
that we don't need to write to spares all the time), it is possible for the
event count to return to zero, which is potentially confusing and triggers and
MD_BUG.

We could possibly remove the MD_BUG, but is just as easy, and probably safer,
to make sure we never return to zero.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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