diff options
| author |   Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2009-12-28 16:47:12 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-12-28 10:36:36 +0100 |
| commit | 29c52aa2300173dd45df04dae1f5acc81a2c93b1 (patch) | |
| tree | c27098eaff73c07d06420d43ce81683ed1bca612 /tools/perf/util/debugfs.c | |
| parent | perf events: Remove CONFIG_EVENT_PROFILE (diff) | |
| download | linux-dev-29c52aa2300173dd45df04dae1f5acc81a2c93b1.tar.xz linux-dev-29c52aa2300173dd45df04dae1f5acc81a2c93b1.zip | |
perf tools: Mount debugfs automatically
Mount debugfs filesystem under '/sys/kernel/debug', if it's not
mounted.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Clark Williams <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <4B387090.7080407@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/debugfs.c')
| -rw-r--r-- | tools/perf/util/debugfs.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/tools/perf/util/debugfs.c b/tools/perf/util/debugfs.c index 06b73ee02c49..1f805fde5fd4 100644 --- a/tools/perf/util/debugfs.c +++ b/tools/perf/util/debugfs.c @@ -106,16 +106,14 @@ int debugfs_valid_entry(const char *path) return 0; } -/* mount the debugfs somewhere */ +/* mount the debugfs somewhere if it's not mounted */ -int debugfs_mount(const char *mountpoint) +char *debugfs_mount(const char *mountpoint) { - char mountcmd[128]; - /* see if it's already mounted */ if (debugfs_find_mountpoint()) { debugfs_premounted = 1; - return 0; + return debugfs_mountpoint; } /* if not mounted and no argument */ @@ -127,13 +125,13 @@ int debugfs_mount(const char *mountpoint) mountpoint = "/sys/kernel/debug"; } + if (mount(NULL, mountpoint, "debugfs", 0, NULL) < 0) + return NULL; + /* save the mountpoint */ strncpy(debugfs_mountpoint, mountpoint, sizeof(debugfs_mountpoint)); - /* mount it */ - snprintf(mountcmd, sizeof(mountcmd), - "/bin/mount -t debugfs debugfs %s", mountpoint); - return system(mountcmd); + return debugfs_mountpoint; } /* umount the debugfs */ |