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authorMasami Hiramatsu <mhiramat@kernel.org>2018-10-18 22:12:34 +0900
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-10-19 17:25:11 -0400
commita360d9e4016c1fcf41553b37ad496870dc5723d0 (patch)
tree20feec7b3cf625dcd19172ce8c7daf4cc2fb675d
parent282447ba6b00c64678ffdf964f44e5c8b1c68377 (diff)
tracing: Fix synthetic event to allow semicolon at end
Fix synthetic event to allow independent semicolon at end. The synthetic_events interface accepts a semicolon after the last word if there is no space. # echo "myevent u64 var;" >> synthetic_events But if there is a space, it returns an error. # echo "myevent u64 var ;" > synthetic_events sh: write error: Invalid argument This behavior is difficult for users to understand. Let's allow the last independent semicolon too. Link: http://lkml.kernel.org/r/153986835420.18251.2191216690677025744.stgit@devbox Cc: Shuah Khan <shuah@kernel.org> Cc: Tom Zanussi <tom.zanussi@linux.intel.com> Cc: stable@vger.kernel.org Fixes: commit 4b147936fa50 ("tracing: Add support for 'synthetic' events") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
-rw-r--r--kernel/trace/trace_events_hist.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 6ff83941065a..d239004aaf29 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1088,7 +1088,7 @@ static int create_synth_event(int argc, char **argv)
i += consumed - 1;
}
- if (i < argc) {
+ if (i < argc && strcmp(argv[i], ";") != 0) {
ret = -EINVAL;
goto err;
}

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