[tip:perf/core] Revert "perf tools: Fix jump label always changing during tracing"

[tip-bot for Jiri Olsa]

Commit-ID:  8578b891ec38c39abd5d6376afd05fce78e2628c
Gitweb:     http://git.kernel.org/tip/8578b891ec38c39abd5d6376afd05fce78e2628c
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Mon, 28 Jul 2014 15:58:47 +0200
Committer:  Jiri Olsa <jolsa@xxxxxxxxxx>
CommitDate: Mon, 28 Jul 2014 16:39:18 +0200

Revert "perf tools: Fix jump label always changing during tracing"

This reverts commit deaff8b659cf4d34181c087b8cdf74f1eb17b02b.

This commit makes CLOEXEC feature undetected for normal users,
because per-cpu events are priviledged.

Reported-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140728065844.GK6758@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/perf/util/cloexec.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
index 6a37be5..c5d05ec 100644
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -1,4 +1,3 @@
-#include <sched.h>
 #include "util.h"
 #include "../perf.h"
 #include "cloexec.h"
@@ -15,13 +14,9 @@ static int perf_flag_probe(void)
 	};
 	int fd;
 	int err;
-	int cpu = sched_getcpu();
-
-	if (cpu < 0)
-		cpu = 0;
 
 	/* check cloexec flag */
-	fd = sys_perf_event_open(&attr, -1, cpu, -1,
+	fd = sys_perf_event_open(&attr, 0, -1, -1,
 				 PERF_FLAG_FD_CLOEXEC);
 	err = errno;
 
@@ -35,7 +30,7 @@ static int perf_flag_probe(void)
 		  err, strerror(err));
 
 	/* not supported, confirm error related to PERF_FLAG_FD_CLOEXEC */
-	fd = sys_perf_event_open(&attr, -1, cpu, -1, 0);
+	fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
 	err = errno;
 
 	if (WARN_ONCE(fd < 0,
--
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