X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fkernel.h;h=cff58e288a225bcd668a0dc482c00e62cb19c8a8;hb=e4c393fd551654179c46b65e4a70ea20d831c783;hp=556d781e69fe2220fd88696de68da014ae963d12;hpb=c2eb2fa6d2b6fe122d3479ec5b28d978418b2698;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 556d781e69f..cff58e288a2 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -242,6 +242,19 @@ extern struct ratelimit_state printk_ratelimit_state;
 extern int printk_ratelimit(void);
 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
 				   unsigned int interval_msec);
+
+/*
+ * Print a one-time message (analogous to WARN_ONCE() et al):
+ */
+#define printk_once(x...) ({			\
+	static int __print_once = 1;		\
+						\
+	if (__print_once) {			\
+		__print_once = 0;		\
+		printk(x);			\
+	}					\
+})
+
 void log_buf_kexec_setup(void);
 #else
 static inline int vprintk(const char *s, va_list args)
@@ -254,6 +267,10 @@ static inline int printk_ratelimit(void) { return 0; }
 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
 					  unsigned int interval_msec)	\
 		{ return false; }
+
+/* No effect, but we still get type checking even in the !PRINTK case: */
+#define printk_once(x...) printk(x)
+
 static inline void log_buf_kexec_setup(void)
 {
 }