[tip:perf/core] perf trace beauty: Alias 'umount' to 'umount2'

[tip-bot for Benjamin Peterson]

Commit-ID:  3de3e8bbf302545ef9acebb9f900939ac5c3820f
Gitweb:     https://git.kernel.org/tip/3de3e8bbf302545ef9acebb9f900939ac5c3820f
Author:     Benjamin Peterson <benjamin@xxxxxxxxxx>
AuthorDate: Mon, 27 Aug 2018 20:53:44 -0700
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 30 Aug 2018 15:52:25 -0300

perf trace beauty: Alias 'umount' to 'umount2'

Before:

  # perf trace -e *mount* umount /dev/mapper/fedora-home /s
    11.576 ( 0.004 ms) umount/3138 umount2(arg0: 94501956754656, arg1: 0, arg2: 1, arg3: 140051050083104, arg4: 4, arg5: 94501956755136) = -1 EINVAL Invalid argument
  #

After:

  # perf trace -e *mount* umount /s
     0.000 ( 9.241 ms): umount/5251 umount2(name: 0x55f74a986480) = 0

Signed-off-by: Benjamin Peterson <benjamin@xxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20180828035344.31500-1-benjamin@xxxxxxxxxx
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-trace.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 97ace635bed8..c106189f4066 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -825,6 +825,7 @@ static struct syscall_fmt {
 	  .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
 	{ .name	    = "tkill",
 	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name     = "umount2", .alias = "umount", },
 	{ .name	    = "uname", .alias = "newuname", },
 	{ .name	    = "unlinkat",
 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },