md/bitmap: make bitmap bitops atomic.
authorNeilBrown <neilb@suse.de>
Tue, 22 May 2012 03:55:23 +0000 (13:55 +1000)
committerNeilBrown <neilb@suse.de>
Tue, 22 May 2012 03:55:23 +0000 (13:55 +1000)
This allows us to remove spinlock protection which is
more heavy-weight than simple atomics.

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

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