dma-debug: track bucket lock state for static checkers
authorStephen Boyd <sboyd@codeaurora.org>
Tue, 26 Jul 2016 22:21:08 +0000 (15:21 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 26 Jul 2016 23:19:19 +0000 (16:19 -0700)
commitd5dfc80f80dbb3bf94e5e9efa694670ea78cd84d
tree8eebed86fbc0b1e4ebbcf087e24c03ccb8de49c6
parent6b524995a71d49ae032dba308d117dbf2a18d175
dma-debug: track bucket lock state for static checkers

get_hash_bucket() and put_hash_bucket() acquire and release the same
spinlock, but this confuses static checkers such as sparse

  lib/dma-debug.c:254:27: warning: context imbalance in 'get_hash_bucket' - wrong count at exit
  lib/dma-debug.c:268:13: warning: context imbalance in 'put_hash_bucket' - unexpected unlock

Add the appropriate acquire and release statements so that checkers can
properly track the lock state.

Link: http://lkml.kernel.org/r/20160701191552.24295-1-sboyd@codeaurora.org
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/dma-debug.c