From 822a6961112f0c9101d3359d8524604c3309ee6c Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Tue, 8 Dec 2009 10:00:04 +0100 Subject: [PATCH] tracing/kprobes: Fix field creation's bad error handling When we define the common event fields in kprobe, we invert the error handling and return immediately in case of success. Then we omit to define specific kprobes fields (ip and nargs), and specific kretprobes fields (func, ret_ip, nargs). And we only define them when we fail to create common fields. The most visible consequence is that we can't create filter for k(ret)probes specific fields. This patch re-invert the success/error handling to fix it. Reported-by: Lai Jiangshan Signed-off-by: Frederic Weisbecker Acked-by: Masami Hiramatsu Cc: Steven Rostedt Cc: Li Zefan LKML-Reference: <1260263815-5167-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar --- kernel/trace/trace_kprobe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index bf05fb4..b52d397 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1133,7 +1133,7 @@ static int kprobe_event_define_fields(struct ftrace_event_call *event_call) struct trace_probe *tp = (struct trace_probe *)event_call->data; ret = trace_define_common_fields(event_call); - if (!ret) + if (ret) return ret; DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0); @@ -1151,7 +1151,7 @@ static int kretprobe_event_define_fields(struct ftrace_event_call *event_call) struct trace_probe *tp = (struct trace_probe *)event_call->data; ret = trace_define_common_fields(event_call); - if (!ret) + if (ret) return ret; DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0); -- 2.7.4