lockdep: Remove cmpxchg to update nr_chain_hlocks
authorSteven Rostedt <srostedt@redhat.com>
Thu, 21 Apr 2011 01:42:00 +0000 (21:42 -0400)
committerIngo Molnar <mingo@elte.hu>
Fri, 22 Apr 2011 09:06:59 +0000 (11:06 +0200)
commite0944ee63f7249802be74454cef81c97630ae1cd
tree00c81028ff9b324bdd9106103f043ba26ea54e41
parent282b5c2f6f663c008444321fd8fcdd374596046b
lockdep: Remove cmpxchg to update nr_chain_hlocks

For some reason nr_chain_hlocks is updated with cmpxchg, but
this is performed inside of the lockdep global "grab_lock()",
which also makes simple modification of this variable atomic.

Remove the cmpxchg logic for updating nr_chain_hlocks and
simplify the code.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20110421014300.727863282@goodmis.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/lockdep.c