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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2009-12-28 11:47:12 +0300
committerIngo Molnar <mingo@elte.hu>2009-12-28 12:36:36 +0300
commit29c52aa2300173dd45df04dae1f5acc81a2c93b1 (patch)
treec27098eaff73c07d06420d43ce81683ed1bca612 /tools/perf/util/debugfs.c
parent07b139c8c81b97bbe55c68daf0cbeca8b1c609ca (diff)
downloadlinux-29c52aa2300173dd45df04dae1f5acc81a2c93b1.tar.xz
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.c16
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 */