This is needed by upcoming list_sort implementation.
Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxxxxxxxx>
---
include/printk.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/printk.h b/include/printk.h
index 822f64c..4b76ca1 100644
--- a/include/printk.h
+++ b/include/printk.h
@@ -92,6 +92,16 @@ static inline int pr_print(int level, const char *format, ...)
#define debug(fmt, arg...) __pr_printk(7, pr_fmt(fmt), ##arg)
#define pr_vdebug(fmt, arg...) __pr_printk(8, pr_fmt(fmt), ##arg)
+#define printk_once(fmt, ...) \
+({ \
+ static bool __print_once ; \
+ \
+ if (!__print_once) { \
+ __print_once = true; \
+ printk(fmt, ##__VA_ARGS__); \
+ } \
+})
+
struct log_entry {
struct list_head list;
char *msg;
--
2.7.3
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