linux-kernel - [PATCH 3.12 027/212] perf tools: Remove cast of non-variadic function to variadic

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Date:	Mon,  2 Dec 2013 11:13:38 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Michael Hudson-Doyle <michael.hudson@...aro.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Will Deacon <will.deacon@....com>,
	Jean Pihet <jean.pihet@...aro.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 3.12 027/212] perf tools: Remove cast of non-variadic function to variadic

3.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Michael Hudson-Doyle <michael.hudson@...aro.org>

commit 53805eca3d89b095062c11a6798689bb0af09216 upstream.

The 4fb71074a570 (perf ui/hist: Consolidate hpp helpers) cset introduced
a cast of percent_color_snprintf to a function pointer type with
varargs.  Change percent_color_snprintf to be variadic and remove the
cast.

The symptom of this was all percentages being reported as 0.00% in perf
report --stdio output on the armhf arch.

Signed-off-by: Michael Hudson-Doyle <michael.hudson@...aro.org>
Acked-by: Namhyung Kim <namhyung@...nel.org>
Acked-by: Will Deacon <will.deacon@....com>
Cc: Jean Pihet <jean.pihet@...aro.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Will Deacon <will.deacon@....com>
Link: http://lkml.kernel.org/r/87zjppvw7y.fsf@canonical.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/perf/ui/hist.c    |    2 +-
 tools/perf/util/color.c |   11 +++++++++--
 tools/perf/util/color.h |    2 +-
 3 files changed, 11 insertions(+), 4 deletions(-)

--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -117,7 +117,7 @@ static int hpp__color_##_type(struct per
 			      struct perf_hpp *hpp, struct hist_entry *he) 	\
 {										\
 	return __hpp__fmt(hpp, he, he_get_##_field, " %6.2f%%",			\
-			  (hpp_snprint_fn)percent_color_snprintf, true);	\
+			  percent_color_snprintf, true);			\
 }
 
 #define __HPP_ENTRY_PERCENT_FN(_type, _field)					\
--- a/tools/perf/util/color.c
+++ b/tools/perf/util/color.c
@@ -318,8 +318,15 @@ int percent_color_fprintf(FILE *fp, cons
 	return r;
 }
 
-int percent_color_snprintf(char *bf, size_t size, const char *fmt, double percent)
+int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
 {
-	const char *color = get_percent_color(percent);
+	va_list args;
+	double percent;
+	const char *color;
+
+	va_start(args, fmt);
+	percent = va_arg(args, double);
+	va_end(args);
+	color = get_percent_color(percent);
 	return color_snprintf(bf, size, color, fmt, percent);
 }
--- a/tools/perf/util/color.h
+++ b/tools/perf/util/color.h
@@ -39,7 +39,7 @@ int color_fprintf(FILE *fp, const char *
 int color_snprintf(char *bf, size_t size, const char *color, const char *fmt, ...);
 int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
 int color_fwrite_lines(FILE *fp, const char *color, size_t count, const char *buf);
-int percent_color_snprintf(char *bf, size_t size, const char *fmt, double percent);
+int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...);
 int percent_color_fprintf(FILE *fp, const char *fmt, double percent);
 const char *get_percent_color(double percent);
 


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