[PATCH -tip v3 5/9] selftests: ftrace: Fix trigger-mod to run without syscall trace

[Masami Hiramatsu]

Since histogram trigger id.syscall depends on CONFIG_FTRACE_SYSCALLS,
a testcase in trigger-modifier test fails if that config is disabled.

Fix this bug by using flexible pattern to check the histogram output.

Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
---
 .../ftrace/test.d/trigger/trigger-hist-mod.tc      |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc
index 0bf5085..400e98b 100644
--- a/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc
+++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc
@@ -56,7 +56,7 @@ echo "Test histogram with syscall modifier"
 
 echo 'hist:keys=id.syscall' > events/raw_syscalls/sys_exit/trigger
 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
-grep "id: sys_" events/raw_syscalls/sys_exit/hist > /dev/null || \
+grep "id: \(unknown_\|sys_\)" events/raw_syscalls/sys_exit/hist > /dev/null || \
     fail "syscall modifier on raw_syscalls/sys_exit did not work"