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perf evlist: Explicititely initialize input_name 

It was a global variable, so it was initialized, implicitely, to zero by
being placed in the bss.

Now it is just a local variable that is then passed to the __cmd_evlist
routine, so it must be explicitely set to NULL.

The problem manifested on a Fedora 17 system, using:

 gcc version 4.7.0 20120507 (Red Hat 4.7.0-5) (GCC)

But not on several other systems, by luck.

Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-5e8wolcjs3rgd5i6yi995gfh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Arnaldo Carvalho de Melo 2012-05-23 21:47:51 -03:00
parent ab0cce560e
commit a1d44b9acd
1 changed files with 1 additions and 1 deletions
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2
tools/perf/builtin-evlist.c
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@ -116,7 +116,7 @@ static const char * const evlist_usage[] = {
int cmd_evlist(int argc, const char **argv, const char *prefix __used)
{
struct perf_attr_details details = { .verbose = false, };
const char *input_name;
const char *input_name = NULL;
const struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"Input file name"),