linux-kernel - [PATCH] timer_list: Reduce SEQ

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Date:	Fri, 17 Apr 2015 11:39:18 -0700
From:	Joe Perches <joe@...ches.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] timer_list: Reduce SEQ_printf footprint

This macro can be converted to a static inline to reduce
object size.

(x86-64 defconfig)
$ size kernel/time/timer_list.o*
   text	   data	    bss	    dec	    hex	filename
   4647	      8	      0	   4655	   122f	kernel/time/timer_list.o.new
   6583	      8	      0	   6591	   19bf	kernel/time/timer_list.o.old

Signed-off-by: Joe Perches <joe@...ches.com>
---
 kernel/time/timer_list.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index e878c2e..5960af21 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -35,13 +35,20 @@ DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases);
  * This allows printing both to /proc/timer_list and
  * to the console (on SysRq-Q):
  */
-#define SEQ_printf(m, x...)			\
- do {						\
-	if (m)					\
-		seq_printf(m, x);		\
-	else					\
-		printk(x);			\
- } while (0)
+__printf(2, 3)
+static void SEQ_printf(struct seq_file *m, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+
+	if (m)
+		seq_vprintf(m, fmt, args);
+	else
+		vprintk(fmt, args);
+
+	va_end(args);
+}
 
 static void print_name_offset(struct seq_file *m, void *sym)
 {


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