trace: module: Maintain a valid user count
authorRomain Izard <romain.izard.pro@gmail.com>
Tue, 4 Mar 2014 09:09:39 +0000 (10:09 +0100)
committerSteven Rostedt <rostedt@goodmis.org>
Thu, 8 May 2014 11:05:18 +0000 (07:05 -0400)
commit098507ae3ec2331476fb52e85d4040c1cc6d0ef4
tree042a286bccbfa39e0db97d36fe9fd4a3ffeae64e
parent561a4fe851ccab9dd0d14989ab566f9392d9f8b5
trace: module: Maintain a valid user count

The replacement of the 'count' variable by two variables 'incs' and
'decs' to resolve some race conditions during module unloading was done
in parallel with some cleanup in the trace subsystem, and was integrated
as a merge.

Unfortunately, the formula for this replacement was wrong in the tracing
code, and the refcount in the traces was not usable as a result.

Use 'count = incs - decs' to compute the user count.

Link: http://lkml.kernel.org/p/1393924179-9147-1-git-send-email-romain.izard.pro@gmail.com
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: stable@vger.kernel.org # 2.6.35
Fixes: c1ab9cab7509 "merge conflict resolution"
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
include/trace/events/module.h