1 files changed, 37 insertions, 17 deletions

diff --git a/include/linux/printk.h b/include/linux/printk.h
index 0525927f203f..9afc01e5a0a6 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -2,27 +2,34 @@
 #define __KERNEL_PRINTK__
 
 #include <linux/init.h>
+#include <linux/kern_levels.h>
 
 extern const char linux_banner[];
 extern const char linux_proc_banner[];
 
-#define KERN_EMERG	"<0>"	/* system is unusable			*/
-#define KERN_ALERT	"<1>"	/* action must be taken immediately	*/
-#define KERN_CRIT	"<2>"	/* critical conditions			*/
-#define KERN_ERR	"<3>"	/* error conditions			*/
-#define KERN_WARNING	"<4>"	/* warning conditions			*/
-#define KERN_NOTICE	"<5>"	/* normal but significant condition	*/
-#define KERN_INFO	"<6>"	/* informational			*/
-#define KERN_DEBUG	"<7>"	/* debug-level messages			*/
-
-/* Use the default kernel loglevel */
-#define KERN_DEFAULT	"<d>"
-/*
- * Annotation for a "continued" line of log printout (only done after a
- * line that had no enclosing \n). Only to be used by core/arch code
- * during early bootup (a continued line is not SMP-safe otherwise).
- */
-#define KERN_CONT	"<c>"
+static inline int printk_get_level(const char *buffer)
+{
+	if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
+		switch (buffer[1]) {
+		case '0' ... '7':
+		case 'd':	/* KERN_DEFAULT */
+			return buffer[1];
+		}
+	}
+	return 0;
+}
+
+static inline const char *printk_skip_level(const char *buffer)
+{
+	if (printk_get_level(buffer)) {
+		switch (buffer[1]) {
+		case '0' ... '7':
+		case 'd':	/* KERN_DEFAULT */
+			return buffer + 2;
+		}
+	}
+	return buffer;
+}
 
 extern int console_printk[];
 
@@ -95,8 +102,19 @@ extern int printk_needs_cpu(int cpu);
 extern void printk_tick(void);
 
 #ifdef CONFIG_PRINTK
+asmlinkage __printf(5, 0)
+int vprintk_emit(int facility, int level,
+		 const char *dict, size_t dictlen,
+		 const char *fmt, va_list args);
+
 asmlinkage __printf(1, 0)
 int vprintk(const char *fmt, va_list args);
+
+asmlinkage __printf(5, 6) __cold
+asmlinkage int printk_emit(int facility, int level,
+			   const char *dict, size_t dictlen,
+			   const char *fmt, ...);
+
 asmlinkage __printf(1, 2) __cold
 int printk(const char *fmt, ...);
 
@@ -289,6 +307,8 @@ extern void dump_stack(void) __cold;
 	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #endif
 
+extern const struct file_operations kmsg_fops;
+
 enum {
 	DUMP_PREFIX_NONE,
 	DUMP_PREFIX_ADDRESS,