perf probe: Fix to use correct debugfs path finder
Instead of using debugfs_path, use debugfs_find_mountpoint()
to find actual debugfs path.
LKML-Reference: <20100414223928.14630.38326.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index ca108b2..1c4a20a 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -42,8 +42,8 @@
#include "color.h"
#include "symbol.h"
#include "thread.h"
+#include "debugfs.h"
#include "trace-event.h" /* For __unused */
-#include "parse-events.h" /* For debugfs_path */
#include "probe-event.h"
#include "probe-finder.h"
@@ -1075,10 +1075,18 @@
static int open_kprobe_events(bool readwrite)
{
char buf[PATH_MAX];
+ const char *__debugfs;
int ret;
- ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path);
+ __debugfs = debugfs_find_mountpoint();
+ if (__debugfs == NULL) {
+ pr_warning("Debugfs is not mounted.\n");
+ return -ENOENT;
+ }
+
+ ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs);
if (ret >= 0) {
+ pr_debug("Opening %s write=%d\n", buf, readwrite);
if (readwrite && !probe_event_dry_run)
ret = open(buf, O_RDWR, O_APPEND);
else