perf/trace/scripting: failed-syscalls-by-pid script cleanup

A small fixe for the failed syscalls by pid script:

 - silence the match output in the shell script

Cc: Frédéric Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
LKML-Reference: <1273466820[email protected]>
Signed-off-by: Tom Zanussi <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/scripts/python/bin/failed-syscalls-by-pid-report b/tools/perf/scripts/python/bin/failed-syscalls-by-pid-report
index 8c128eff9c0a11af8f4b57256e21f1b52acd742c..30293545fcc2864f0f577669ed88a40353c1f4a9 100644 (file)
--- a/tools/perf/scripts/python/bin/failed-syscalls-by-pid-report
+++ b/tools/perf/scripts/python/bin/failed-syscalls-by-pid-report
@@ -2,7 +2,7 @@
 # description: system-wide failed syscalls, by pid
 # args: [comm]
 if [ $# -gt 0 ] ; then
-    if ! expr match "$1" "-" ; then
+    if ! expr match "$1" "-" > /dev/null ; then
        comm=$1
        shift
     fi