Merge tag 'perf-core-for-mingo-4.12-20170320' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

Fixes:

- Fix concat_probe_trace_events() in 'perf probe', it should dereference a
  pointer, not test its value (Ravi Bangoria)

User visible changes:

- Handle partial AUX records, checking if 'kvm_intel.ko' is loaded and
  if its 'vmm_exclusive' parameter is set to 0, suggesting tweaking
  it to reduce gaps (Alexander Shishkin)

Infrastructure changes:

- Sync the kvm.h, cpufeatures.h and perf_event.h tools/ headers copies
  with the kernel (Arnaldo Carvalho de Melo, Alexander Shishkin)

- 'perf lock' subcommands should include common options, using
  OPT_PARENT() (Changbin Du)

- Ditto for 'perf timechart' (Arnaldo Carvalho de Melo)

Documentation changes:

  Correct 'perf stat --no-aggr' description (Ravi Bangoria)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 4b6bfc43cccf..809c7721cd24 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -439,6 +439,35 @@ int sysfs__read_str(const char *entry, char **buf, size_t *sizep)
 	return filename__read_str(path, buf, sizep);
 }
 
+int sysfs__read_bool(const char *entry, bool *value)
+{
+	char *buf;
+	size_t size;
+	int ret;
+
+	ret = sysfs__read_str(entry, &buf, &size);
+	if (ret < 0)
+		return ret;
+
+	switch (buf[0]) {
+	case '1':
+	case 'y':
+	case 'Y':
+		*value = true;
+		break;
+	case '0':
+	case 'n':
+	case 'N':
+		*value = false;
+		break;
+	default:
+		ret = -1;
+	}
+
+	free(buf);
+
+	return ret;
+}
 int sysctl__read_int(const char *sysctl, int *value)
 {
 	char path[PATH_MAX];