[tip:perf/core] perf machine: Stop accessing atomic_t:: counter directly

[tip-bot for Arnaldo Carvalho de Melo <tipbot@zytor.com>]

Commit-ID:  59a51c1dc9fbb3fb4af928b852d7b35df83edd74
Gitweb:     http://git.kernel.org/tip/59a51c1dc9fbb3fb4af928b852d7b35df83edd74
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Fri, 15 May 2015 15:32:55 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 15 May 2015 15:32:55 -0300

perf machine: Stop accessing atomic_t::counter directly

Use atomic_read(&counter) instead.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-k3hvfvpaut8wp02lzq27muhb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/machine.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 34bf89f..daa5591 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1311,7 +1311,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th,
 	if (machine->last_match == th)
 		machine->last_match = NULL;
 
-	BUG_ON(th->refcnt.counter == 0);
+	BUG_ON(atomic_read(&th->refcnt) == 0);
 	if (lock)
 		pthread_rwlock_wrlock(&machine->threads_lock);
 	rb_erase(&th->rb_node, &machine->threads);