1 files changed, 151 insertions, 97 deletions

diff --git a/include/linux/printk.h b/include/linux/printk.h
index b772ca5fbdf0..ee048e77e1ae 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -4,14 +4,14 @@
 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                 */
+#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>"
@@ -20,7 +20,7 @@ extern const char linux_proc_banner[];
  * 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>"
+#define KERN_CONT       "<c>"
 
 extern int console_printk[];
 
@@ -29,6 +29,17 @@ extern int console_printk[];
 #define minimum_console_loglevel (console_printk[2])
 #define default_console_loglevel (console_printk[3])
 
+static inline void console_silent(void)
+{
+        console_loglevel = 0;
+}
+
+static inline void console_verbose(void)
+{
+        if (console_loglevel)
+                console_loglevel = 15;
+}
+
 struct va_format {
         const char *fmt;
         va_list *va;
@@ -65,11 +76,27 @@ struct va_format {
  */
 #define HW_ERR          "[Hardware Error]: "
 
+/*
+ * Dummy printk for disabled debugging statements to use whilst maintaining
+ * gcc's format and side-effect checking.
+ */
+static inline __attribute__ ((format (printf, 1, 2)))
+int no_printk(const char *fmt, ...)
+{
+        return 0;
+}
+
+extern asmlinkage __attribute__ ((format (printf, 1, 2)))
+void early_printk(const char *fmt, ...);
+
+extern int printk_needs_cpu(int cpu);
+extern void printk_tick(void);
+
 #ifdef CONFIG_PRINTK
-asmlinkage int vprintk(const char *fmt, va_list args)
-        __attribute__ ((format (printf, 1, 0)));
-asmlinkage int printk(const char * fmt, ...)
-        __attribute__ ((format (printf, 1, 2))) __cold;
+asmlinkage __attribute__ ((format (printf, 1, 0)))
+int vprintk(const char *fmt, va_list args);
+asmlinkage __attribute__ ((format (printf, 1, 2))) __cold
+int printk(const char *fmt, ...);
 
 /*
  * Please don't use printk_ratelimit(), because it shares ratelimiting state
@@ -83,99 +110,56 @@ extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
 
 extern int printk_delay_msec;
 extern int dmesg_restrict;
-
-/*
- * Print a one-time message (analogous to WARN_ONCE() et al):
- */
-#define printk_once(x...) ({                    \
-        static bool __print_once;               \
-                                                \
-        if (!__print_once) {                    \
-                __print_once = true;            \
-                printk(x);                      \
-        }                                       \
-})
+extern int kptr_restrict;
 
 void log_buf_kexec_setup(void);
 #else
-static inline int vprintk(const char *s, va_list args)
-        __attribute__ ((format (printf, 1, 0)));
-static inline int vprintk(const char *s, va_list args) { return 0; }
-static inline int printk(const char *s, ...)
-        __attribute__ ((format (printf, 1, 2)));
-static inline int __cold printk(const char *s, ...) { return 0; }
-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)
+static inline __attribute__ ((format (printf, 1, 0)))
+int vprintk(const char *s, va_list args)
 {
+        return 0;
 }
-#endif
-
-/*
- * Dummy printk for disabled debugging statements to use whilst maintaining
- * gcc's format and side-effect checking.
- */
-static inline __attribute__ ((format (printf, 1, 2)))
-int no_printk(const char *s, ...) { return 0; }
-
-extern int printk_needs_cpu(int cpu);
-extern void printk_tick(void);
-
-extern void asmlinkage __attribute__((format(printf, 1, 2)))
-        early_printk(const char *fmt, ...);
-
-static inline void console_silent(void)
+static inline __attribute__ ((format (printf, 1, 2))) __cold
+int printk(const char *s, ...)
 {
-        console_loglevel = 0;
+        return 0;
+}
+static inline int printk_ratelimit(void)
+{
+        return 0;
+}
+static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
+                                          unsigned int interval_msec)
+{
+        return false;
 }
 
-static inline void console_verbose(void)
+static inline void log_buf_kexec_setup(void)
 {
-        if (console_loglevel)
-                console_loglevel = 15;
 }
+#endif
 
 extern void dump_stack(void) __cold;
 
-enum {
-        DUMP_PREFIX_NONE,
-        DUMP_PREFIX_ADDRESS,
-        DUMP_PREFIX_OFFSET
-};
-extern void hex_dump_to_buffer(const void *buf, size_t len,
-                                int rowsize, int groupsize,
-                                char *linebuf, size_t linebuflen, bool ascii);
-extern void print_hex_dump(const char *level, const char *prefix_str,
-                                int prefix_type, int rowsize, int groupsize,
-                                const void *buf, size_t len, bool ascii);
-extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
-                        const void *buf, size_t len);
-
 #ifndef pr_fmt
 #define pr_fmt(fmt) fmt
 #endif
 
 #define pr_emerg(fmt, ...) \
-        printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_alert(fmt, ...) \
-        printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_crit(fmt, ...) \
-        printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_err(fmt, ...) \
-        printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_warning(fmt, ...) \
-        printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_warn pr_warning
 #define pr_notice(fmt, ...) \
-        printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_info(fmt, ...) \
-        printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
+        printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_cont(fmt, ...) \
         printk(KERN_CONT fmt, ##__VA_ARGS__)
 
@@ -185,7 +169,7 @@ extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
         printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #else
 #define pr_devel(fmt, ...) \
-        ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
+        no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #endif
 
 /* If you are writing a driver, please use dev_dbg instead */
@@ -198,7 +182,51 @@ extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
         dynamic_pr_debug(fmt, ##__VA_ARGS__)
 #else
 #define pr_debug(fmt, ...) \
-        ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
+        no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#endif
+
+/*
+ * Print a one-time message (analogous to WARN_ONCE() et al):
+ */
+
+#ifdef CONFIG_PRINTK
+#define printk_once(fmt, ...)                   \
+({                                              \
+        static bool __print_once;               \
+                                                \
+        if (!__print_once) {                    \
+                __print_once = true;            \
+                printk(fmt, ##__VA_ARGS__);     \
+        }                                       \
+})
+#else
+#define printk_once(fmt, ...)                   \
+        no_printk(fmt, ##__VA_ARGS__)
+#endif
+
+#define pr_emerg_once(fmt, ...)                                 \
+        printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_alert_once(fmt, ...)                                 \
+        printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_crit_once(fmt, ...)                                  \
+        printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_err_once(fmt, ...)                                   \
+        printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_warn_once(fmt, ...)                                  \
+        printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_notice_once(fmt, ...)                                \
+        printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_info_once(fmt, ...)                                  \
+        printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
+#define pr_cont_once(fmt, ...)                                  \
+        printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
+/* If you are writing a driver, please use dev_dbg instead */
+#if defined(DEBUG)
+#define pr_debug_once(fmt, ...)                                 \
+        printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#else
+#define pr_debug_once(fmt, ...)                                 \
+        no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #endif
 
 /*
@@ -206,7 +234,8 @@ extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
  * no local ratelimit_state used in the !PRINTK case
  */
 #ifdef CONFIG_PRINTK
-#define printk_ratelimited(fmt, ...)  ({                                \
+#define printk_ratelimited(fmt, ...)                                    \
+({                                                                      \
         static DEFINE_RATELIMIT_STATE(_rs,                              \
                                       DEFAULT_RATELIMIT_INTERVAL,       \
                                       DEFAULT_RATELIMIT_BURST);         \
@@ -215,34 +244,59 @@ extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
                 printk(fmt, ##__VA_ARGS__);                             \
 })
 #else
-/* No effect, but we still get type checking even in the !PRINTK case: */
-#define printk_ratelimited printk
+#define printk_ratelimited(fmt, ...)                                    \
+        no_printk(fmt, ##__VA_ARGS__)
 #endif
 
-#define pr_emerg_ratelimited(fmt, ...) \
+#define pr_emerg_ratelimited(fmt, ...)                                  \
         printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_alert_ratelimited(fmt, ...) \
+#define pr_alert_ratelimited(fmt, ...)                                  \
         printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_crit_ratelimited(fmt, ...) \
+#define pr_crit_ratelimited(fmt, ...)                                   \
         printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_err_ratelimited(fmt, ...) \
+#define pr_err_ratelimited(fmt, ...)                                    \
         printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_warning_ratelimited(fmt, ...) \
+#define pr_warn_ratelimited(fmt, ...)                                   \
         printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_warn_ratelimited pr_warning_ratelimited
-#define pr_notice_ratelimited(fmt, ...) \
+#define pr_notice_ratelimited(fmt, ...)                                 \
         printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_info_ratelimited(fmt, ...) \
+#define pr_info_ratelimited(fmt, ...)                                   \
         printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
 /* no pr_cont_ratelimited, don't do that... */
 /* If you are writing a driver, please use dev_dbg instead */
 #if defined(DEBUG)
-#define pr_debug_ratelimited(fmt, ...) \
+#define pr_debug_ratelimited(fmt, ...)                                  \
         printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #else
 #define pr_debug_ratelimited(fmt, ...) \
-        ({ if (0) printk_ratelimited(KERN_DEBUG pr_fmt(fmt), \
-                                     ##__VA_ARGS__); 0; })
+        no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#endif
+
+enum {
+        DUMP_PREFIX_NONE,
+        DUMP_PREFIX_ADDRESS,
+        DUMP_PREFIX_OFFSET
+};
+extern void hex_dump_to_buffer(const void *buf, size_t len,
+                               int rowsize, int groupsize,
+                               char *linebuf, size_t linebuflen, bool ascii);
+#ifdef CONFIG_PRINTK
+extern void print_hex_dump(const char *level, const char *prefix_str,
+                           int prefix_type, int rowsize, int groupsize,
+                           const void *buf, size_t len, bool ascii);
+extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
+                                 const void *buf, size_t len);
+#else
+static inline void print_hex_dump(const char *level, const char *prefix_str,
+                                  int prefix_type, int rowsize, int groupsize,
+                                  const void *buf, size_t len, bool ascii)
+{
+}
+static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
+                                        const void *buf, size_t len)
+{
+}
+
 #endif
 
 #endif