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tracepoints: dont update zero-sized tracepoint sections

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Zero-sized tracepoint sections can occur if tracing is enabled but
no tracepoint is defined. Do not emit a warning in that case.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
LKML-Reference: <1237394936.3132.1.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-03-18 19:54:04 +01:00
parent 09933a108e
commit ec625cb29e
1 changed files with 1 additions and 3 deletions
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4
kernel/tracepoint.c
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@ -278,10 +278,8 @@ tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end)
struct tracepoint *iter; struct tracepoint *iter;
struct tracepoint_entry *mark_entry; struct tracepoint_entry *mark_entry;
if (!begin) { if (!begin)
WARN_ON_ONCE(1);
return; return;
}
mutex_lock(&tracepoints_mutex); mutex_lock(&tracepoints_mutex);
for (iter = begin; iter < end; iter++) { for (iter = begin; iter < end; iter++) {