perf tools: Use sysctl__read_int instead of ad-hoc copies

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pt2u7a3b50oddggecx7rwq2n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index cf69325..8acd0df 100644 (file)
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -137,16 +137,7 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts)
 
 static int get_max_rate(unsigned int *rate)
 {
-       char path[PATH_MAX];
-       const char *procfs = procfs__mountpoint();
-
-       if (!procfs)
-               return -1;
-
-       snprintf(path, PATH_MAX,
-                "%s/sys/kernel/perf_event_max_sample_rate", procfs);
-
-       return filename__read_int(path, (int *) rate);
+       return sysctl__read_int("kernel/perf_event_max_sample_rate", (int *)rate);
 }
 
 static int record_opts__config_freq(struct record_opts *opts)

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 41125e5..b86744f 100644 (file)
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -506,16 +506,9 @@ const char *get_filename_for_perf_kvm(void)
 
 int perf_event_paranoid(void)
 {
-       char path[PATH_MAX];
-       const char *procfs = procfs__mountpoint();
        int value;
 
-       if (!procfs)
-               return INT_MAX;
-
-       scnprintf(path, PATH_MAX, "%s/sys/kernel/perf_event_paranoid", procfs);
-
-       if (filename__read_int(path, &value))
+       if (sysctl__read_int("kernel/perf_event_paranoid", &value))
                return INT_MAX;
 
        return value;