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| author | Jiri Olsa <jolsa@kernel.org> | 2014-07-28 17:58:47 +0400 |
|---|---|---|
| committer | Jiri Olsa <jolsa@kernel.org> | 2014-07-28 18:39:18 +0400 |
| commit | 8578b891ec38c39abd5d6376afd05fce78e2628c (patch) | |
| tree | 3f56a1a1e1e561e25317c7c3ede127d509961ffa | |
| parent | 78a1b503c8d4115cc608208cc767f57c91381165 (diff) | |
| download | linux-8578b891ec38c39abd5d6376afd05fce78e2628c.tar.xz | |
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@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>
| -rw-r--r-- | tools/perf/util/cloexec.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c index 6a37be53a5d2..c5d05ec17220 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, |