tree 89957d8ef4dba3fe8d609bd90619f7bf6f15ec0f
parent 43506fad21ca3d8dc59e768ff458f7c5e5c01086
author Rolf Eike Beer <eike-kernel@sf-tec.de> 1294962444 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1294968768 -0800

mm/dmapool.c: take lock only once in dma_pool_free()

dma_pool_free() scans for the page to free in the pool list holding the
pool lock.  Then it releases the lock basically to acquire it immediately
again.  Modify the code to only take the lock once.

This will do some additional loops and computations with the lock held in
if memory debugging is activated.  If it is not activated the only new
operations with this lock is one if and one substraction.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>