[PATCH 07/23] tools: Adopt __scanf from kernel sources

Arnaldo Carvalho de Melo
2017-06-20T01:57:35Z

From: Arnaldo Carvalho de Melo <acme@redhat.com>

To have a more compact way to ask the compiler to perform scanf like
argument validation.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-yzqrhfjrn26lqqtwf55egg0h@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/include/linux/compiler-gcc.h | 1 +
tools/perf/util/pmu.h | 4 ++--
2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/include/linux/compiler-gcc.h b/tools/include/linux/compiler-gcc.h
index f531b258ff94..2846094aad4d 100644
--- a/tools/include/linux/compiler-gcc.h
+++ b/tools/include/linux/compiler-gcc.h
@@ -23,3 +23,4 @@
#define __noreturn __attribute__((noreturn))

#define __printf(a, b) __attribute__((format(printf, a, b)))
+#define __scanf(a, b) __attribute__((format(scanf, a, b)))
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index ea7f450dc609..389e9729331f 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -2,6 +2,7 @@
#define __PMU_H

#include <linux/bitmap.h>
+#include <linux/compiler.h>
#include <linux/perf_event.h>
#include <stdbool.h>
#include "evsel.h"
@@ -83,8 +84,7 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet,
bool long_desc, bool details_flag);
bool pmu_have_event(const char *pname, const char *name);

-int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
- ...) __attribute__((format(scanf, 3, 4)));
+int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) __scanf(3, 4);

int perf_pmu__test(void);

--
2.9.4