From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] printk: Mark printk_once test variable __read_mostly
Date: Sun, 06 Oct 2013 12:32:17 -0700 [thread overview]
Message-ID: <1381087937.2081.151.camel@joe-AO722> (raw)
It's only set once so mark it __read_mostly.
Neaten the alignment so it matches the rest of the
pr_<level>_once #defines too.
Signed-off-by: Joe Perches <joe@perches.com>
---
include/linux/printk.h | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/include/linux/printk.h b/include/linux/printk.h
index e6131a78..abd42dd 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -251,17 +251,17 @@ extern asmlinkage void dump_stack(void) __cold;
*/
#ifdef CONFIG_PRINTK
-#define printk_once(fmt, ...) \
-({ \
- static bool __print_once; \
- \
- if (!__print_once) { \
- __print_once = true; \
- printk(fmt, ##__VA_ARGS__); \
- } \
+#define printk_once(fmt, ...) \
+({ \
+ static bool __print_once __read_mostly; \
+ \
+ if (!__print_once) { \
+ __print_once = true; \
+ printk(fmt, ##__VA_ARGS__); \
+ } \
})
#else
-#define printk_once(fmt, ...) \
+#define printk_once(fmt, ...) \
no_printk(fmt, ##__VA_ARGS__)
#endif
reply other threads:[~2013-10-06 19:32 UTC|newest]
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