linux-kernel - [PATCH] [perf/core branch] perf coresight: Fix ARM builds caused by misplaced _

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Date:   Fri, 16 Jun 2017 14:59:07 -0500
From:   Kim Phillips <kim.phillips@....com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [perf/core branch] perf coresight: Fix ARM builds caused by
 misplaced __printf

Trailing __printf attributes work for function declarations, but not
definitions.  This patch fixes arm32/64 builds by placing __printf
before the declarator.  Otherwise this happens:

arch/arm64/util/../../arm/util/cs-etm.c:586:1: error: attributes should be specified before the declarator in a function definition
 static int cs_device__print_file(const char *name, const char *fmt, ...) __printf(2, 3)
 ^~~~~~
arch/arm64/util/../../arm/util/cs-etm.c: In function ‘cs_etm_set_drv_config’:
arch/arm64/util/../../arm/util/cs-etm.c:610:8: error: implicit declaration of function ‘cs_device__print_file’ [-Werror=implicit-function-declaration]
  ret = cs_device__print_file(enable_sink, "%d", 1);
        ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/util/../../arm/util/cs-etm.c:610:2: error: nested extern declaration of ‘cs_device__print_file’ [-Werror=nested-externs]
  ret = cs_device__print_file(enable_sink, "%d", 1);
  ^~~
At top level:
arch/arm64/util/../../arm/util/cs-etm.c:566:14: error: ‘cs_device__open_file’ defined but not used [-Werror=unused-function]
 static FILE *cs_device__open_file(const char *name)
              ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Fixes: 2ee261d962ac "tools: Adopt __printf from kernel sources"
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Kim Phillips <kim.phillips@....com>
---
Applies to acme's perf/core branch

 tools/perf/arch/arm/util/cs-etm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index 90a6f42ba904..7ce3d1a25133 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -583,7 +583,7 @@ static FILE *cs_device__open_file(const char *name)
 
 }
 
-static int cs_device__print_file(const char *name, const char *fmt, ...) __printf(2, 3)
+static int __printf(2, 3) cs_device__print_file(const char *name, const char *fmt, ...)
 {
 	va_list args;
 	FILE *file;
-- 
2.11.0