perf events: Fix false positive build warning with older GCC's
gcc 4.2.1 produces: util/probe-event.c: In function 'add_perf_probe_events': util/probe-event.c:883: warning: 'tev' may be used uninitialized in this function make: *** [util/probe-event.o] Error 1 Newer GCCs get this right. To work it around, initialize the variable to NULL so that older GCCs see it as initialized too. Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100316220612.32050.33806.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -880,7 +880,7 @@ static void __add_kprobe_trace_events(struct perf_probe_event *pev,
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int ntevs, bool allow_suffix)
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{
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int i, fd;
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struct kprobe_trace_event *tev;
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struct kprobe_trace_event *tev = NULL;
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char buf[64];
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const char *event, *group;
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struct strlist *namelist;
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