perf namespaces: Fixup the nsinfo__in_pidns() return type, its bool

When adding support for refconunt checking a cut'n'paste made this
function, that is just an accessor to a bool member of 'struct nsinfo',
return a pid_t, when that member is a boolean, fix it.

Fixes: bcaf0a9 ("perf namespaces: Add functions to access nsinfo")
Reported-by: Francesco Nigro <[email protected]>
Reported-by: Ilan Green <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Clark Williams <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yonatan Goldschmidt <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: acmel

tools/perf/util/namespaces.c

@@ -266,7 +266,7 @@ pid_t nsinfo__pid(const struct nsinfo  *nsi)
 	return RC_CHK_ACCESS(nsi)->pid;
 }
 
-pid_t nsinfo__in_pidns(const struct nsinfo  *nsi)
+bool nsinfo__in_pidns(const struct nsinfo *nsi)
 {
 	return RC_CHK_ACCESS(nsi)->in_pidns;
 }

tools/perf/util/namespaces.h

@@ -58,7 +58,7 @@ void nsinfo__clear_need_setns(struct nsinfo *nsi);
 pid_t nsinfo__tgid(const struct nsinfo  *nsi);
 pid_t nsinfo__nstgid(const struct nsinfo  *nsi);
 pid_t nsinfo__pid(const struct nsinfo  *nsi);
-pid_t nsinfo__in_pidns(const struct nsinfo  *nsi);
+bool nsinfo__in_pidns(const struct nsinfo  *nsi);
 void nsinfo__set_in_pidns(struct nsinfo *nsi);
 
 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);