Russell King 66377efa3f drm/armada: use xchg() to atomically update dplane->old_fb
Rather than using a spinlock, use xchg() to atomically update
dplane->old_fb.  This allows us to eliminate dplane->lock.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-10-01 14:32:52 +01:00
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