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

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This reverts commit deaff8b659.

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

Reported-by: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20140728065844.GK6758@twins.programming.kicks-ass.net
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
Jiri Olsa 2014-07-28 15:58:47 +02:00
parent 78a1b503c8
commit 8578b891ec
1 changed files with 2 additions and 7 deletions
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9
tools/perf/util/cloexec.c
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@ -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,