linux-kernel - [tip:perf/core] perf machine: Stop accessing atomic

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Date:	Wed, 20 May 2015 05:21:51 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, bp@...e.de, jolsa@...hat.com,
	namhyung@...nel.org, dzickus@...hat.com, fweisbec@...il.com,
	adrian.hunter@...el.com, mingo@...nel.org, acme@...hat.com,
	eranian@...gle.com, tglx@...utronix.de, hpa@...or.com,
	dsahern@...il.com
Subject: [tip:perf/core] perf machine: Stop accessing atomic_t::
 counter directly

Commit-ID:  59a51c1dc9fbb3fb4af928b852d7b35df83edd74
Gitweb:     http://git.kernel.org/tip/59a51c1dc9fbb3fb4af928b852d7b35df83edd74
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Fri, 15 May 2015 15:32:55 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.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@...el.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: David Ahern <dsahern@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-k3hvfvpaut8wp02lzq27muhb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.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);
--
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