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| author | John Stultz <john.stultz@linaro.org> | 2014-06-04 16:11:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-04 16:54:17 -0700 |
| commit | c224815dac9c739b79050d3cc67443ff500bc478 (patch) | |
| tree | 07cca4568dd1ae0c89241c1b335a1941ec2bca85 /include/linux/printk.h | |
| parent | aac74dc495456412c4130a1167ce4beb6c1f0b38 (diff) | |
| download | linux-c224815dac9c739b79050d3cc67443ff500bc478.tar.gz linux-c224815dac9c739b79050d3cc67443ff500bc478.tar.bz2 linux-c224815dac9c739b79050d3cc67443ff500bc478.zip | |
printk: Add printk_deferred_once
Two of the three prink_deferred uses are really printk_once style
uses, so add a printk_deferred_once macro to simplify those call
sites.
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Bohac <jbohac@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/printk.h')
| -rw-r--r-- | include/linux/printk.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index 7847301e2837..f086d6c99dbc 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -266,9 +266,20 @@ extern asmlinkage void dump_stack(void) __cold; printk(fmt, ##__VA_ARGS__); \ } \ }) +#define printk_deferred_once(fmt, ...) \ +({ \ + static bool __print_once __read_mostly; \ + \ + if (!__print_once) { \ + __print_once = true; \ + printk_deferred(fmt, ##__VA_ARGS__); \ + } \ +}) #else #define printk_once(fmt, ...) \ no_printk(fmt, ##__VA_ARGS__) +#define printk_deferred_once(fmt, ...) \ + no_printk(fmt, ##__VA_ARGS__) #endif #define pr_emerg_once(fmt, ...) \ |