device.h: move dev_printk()-like functions to dev_printk.h

device.h has everything and the kitchen sink when it comes to struct
device things, so split out the printk-specific things to a separate .h
file to make things easier to maintain and manage over time.

Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20191209193303.1694546-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 236 insertions, 216 deletions

diff --git a/include/linux/dev_printk.h b/include/linux/dev_printk.h
new file mode 100644
index 000000000000..5aad06b4ca7b
--- /dev/null
+++ b/include/linux/dev_printk.h
@@ -0,0 +1,235 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dev_printk.h - printk messages helpers for devices
+ *
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
+ *
+ */
+
+#ifndef _DEVICE_PRINTK_H_
+#define _DEVICE_PRINTK_H_
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <linux/ratelimit.h>
+
+#ifndef dev_fmt
+#define dev_fmt(fmt) fmt
+#endif
+
+struct device;
+
+#ifdef CONFIG_PRINTK
+
+__printf(3, 0) __cold
+int dev_vprintk_emit(int level, const struct device *dev,
+		     const char *fmt, va_list args);
+__printf(3, 4) __cold
+int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
+
+__printf(3, 4) __cold
+void dev_printk(const char *level, const struct device *dev,
+		const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_emerg(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_alert(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_crit(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_err(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_warn(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_notice(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_info(const struct device *dev, const char *fmt, ...);
+
+#else
+
+static inline __printf(3, 0)
+int dev_vprintk_emit(int level, const struct device *dev,
+		     const char *fmt, va_list args)
+{ return 0; }
+static inline __printf(3, 4)
+int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
+{ return 0; }
+
+static inline void __dev_printk(const char *level, const struct device *dev,
+				struct va_format *vaf)
+{}
+static inline __printf(3, 4)
+void dev_printk(const char *level, const struct device *dev,
+		 const char *fmt, ...)
+{}
+
+static inline __printf(2, 3)
+void _dev_emerg(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_crit(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_alert(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_err(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_warn(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_notice(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_info(const struct device *dev, const char *fmt, ...)
+{}
+
+#endif
+
+/*
+ * #defines for all the dev_<level> macros to prefix with whatever
+ * possible use of #define dev_fmt(fmt) ...
+ */
+
+#define dev_emerg(dev, fmt, ...)					\
+	_dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_crit(dev, fmt, ...)						\
+	_dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_alert(dev, fmt, ...)					\
+	_dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_err(dev, fmt, ...)						\
+	_dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_warn(dev, fmt, ...)						\
+	_dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_notice(dev, fmt, ...)					\
+	_dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_info(dev, fmt, ...)						\
+	_dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define dev_dbg(dev, fmt, ...)						\
+	dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#elif defined(DEBUG)
+#define dev_dbg(dev, fmt, ...)						\
+	dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
+#else
+#define dev_dbg(dev, fmt, ...)						\
+({									\
+	if (0)								\
+		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+})
+#endif
+
+#ifdef CONFIG_PRINTK
+#define dev_level_once(dev_level, dev, fmt, ...)			\
+do {									\
+	static bool __print_once __read_mostly;				\
+									\
+	if (!__print_once) {						\
+		__print_once = true;					\
+		dev_level(dev, fmt, ##__VA_ARGS__);			\
+	}								\
+} while (0)
+#else
+#define dev_level_once(dev_level, dev, fmt, ...)			\
+do {									\
+	if (0)								\
+		dev_level(dev, fmt, ##__VA_ARGS__);			\
+} while (0)
+#endif
+
+#define dev_emerg_once(dev, fmt, ...)					\
+	dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
+#define dev_alert_once(dev, fmt, ...)					\
+	dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
+#define dev_crit_once(dev, fmt, ...)					\
+	dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
+#define dev_err_once(dev, fmt, ...)					\
+	dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
+#define dev_warn_once(dev, fmt, ...)					\
+	dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
+#define dev_notice_once(dev, fmt, ...)					\
+	dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
+#define dev_info_once(dev, fmt, ...)					\
+	dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
+#define dev_dbg_once(dev, fmt, ...)					\
+	dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
+
+#define dev_level_ratelimited(dev_level, dev, fmt, ...)			\
+do {									\
+	static DEFINE_RATELIMIT_STATE(_rs,				\
+				      DEFAULT_RATELIMIT_INTERVAL,	\
+				      DEFAULT_RATELIMIT_BURST);		\
+	if (__ratelimit(&_rs))						\
+		dev_level(dev, fmt, ##__VA_ARGS__);			\
+} while (0)
+
+#define dev_emerg_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
+#define dev_alert_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
+#define dev_crit_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
+#define dev_err_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
+#define dev_warn_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
+#define dev_notice_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
+#define dev_info_ratelimited(dev, fmt, ...)				\
+	dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
+#if defined(CONFIG_DYNAMIC_DEBUG)
+/* descriptor check is first to prevent flooding with "callbacks suppressed" */
+#define dev_dbg_ratelimited(dev, fmt, ...)				\
+do {									\
+	static DEFINE_RATELIMIT_STATE(_rs,				\
+				      DEFAULT_RATELIMIT_INTERVAL,	\
+				      DEFAULT_RATELIMIT_BURST);		\
+	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);			\
+	if (DYNAMIC_DEBUG_BRANCH(descriptor) &&				\
+	    __ratelimit(&_rs))						\
+		__dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt),	\
+				  ##__VA_ARGS__);			\
+} while (0)
+#elif defined(DEBUG)
+#define dev_dbg_ratelimited(dev, fmt, ...)				\
+do {									\
+	static DEFINE_RATELIMIT_STATE(_rs,				\
+				      DEFAULT_RATELIMIT_INTERVAL,	\
+				      DEFAULT_RATELIMIT_BURST);		\
+	if (__ratelimit(&_rs))						\
+		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+} while (0)
+#else
+#define dev_dbg_ratelimited(dev, fmt, ...)				\
+do {									\
+	if (0)								\
+		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+} while (0)
+#endif
+
+#ifdef VERBOSE_DEBUG
+#define dev_vdbg	dev_dbg
+#else
+#define dev_vdbg(dev, fmt, ...)						\
+({									\
+	if (0)								\
+		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+})
+#endif
+
+/*
+ * dev_WARN*() acts like dev_printk(), but with the key difference of
+ * using WARN/WARN_ONCE to include file/line information and a backtrace.
+ */
+#define dev_WARN(dev, format, arg...) \
+	WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
+
+#define dev_WARN_ONCE(dev, condition, format, arg...) \
+	WARN_ONCE(condition, "%s %s: " format, \
+			dev_driver_string(dev), dev_name(dev), ## arg)
+
+#endif /* _DEVICE_PRINTK_H_ */
diff --git a/include/linux/device.h b/include/linux/device.h
index ba4c24f9cd8b..758e7dccfcbb 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -12,6 +12,7 @@
 #ifndef _DEVICE_H_
 #define _DEVICE_H_
 
+#include <linux/dev_printk.h>
 #include <linux/ioport.h>
 #include <linux/kobject.h>
 #include <linux/klist.h>
@@ -22,7 +23,6 @@
 #include <linux/mutex.h>
 #include <linux/pm.h>
 #include <linux/atomic.h>
-#include <linux/ratelimit.h>
 #include <linux/uidgid.h>
 #include <linux/gfp.h>
 #include <linux/overflow.h>
@@ -1683,221 +1683,6 @@ void device_link_remove(void *consumer, struct device *supplier);
 void device_links_supplier_sync_state_pause(void);
 void device_links_supplier_sync_state_resume(void);
 
-#ifndef dev_fmt
-#define dev_fmt(fmt) fmt
-#endif
-
-#ifdef CONFIG_PRINTK
-
-__printf(3, 0) __cold
-int dev_vprintk_emit(int level, const struct device *dev,
-		     const char *fmt, va_list args);
-__printf(3, 4) __cold
-int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
-
-__printf(3, 4) __cold
-void dev_printk(const char *level, const struct device *dev,
-		const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_emerg(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_alert(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_crit(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_err(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_warn(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_notice(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_info(const struct device *dev, const char *fmt, ...);
-
-#else
-
-static inline __printf(3, 0)
-int dev_vprintk_emit(int level, const struct device *dev,
-		     const char *fmt, va_list args)
-{ return 0; }
-static inline __printf(3, 4)
-int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
-{ return 0; }
-
-static inline void __dev_printk(const char *level, const struct device *dev,
-				struct va_format *vaf)
-{}
-static inline __printf(3, 4)
-void dev_printk(const char *level, const struct device *dev,
-		 const char *fmt, ...)
-{}
-
-static inline __printf(2, 3)
-void _dev_emerg(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_crit(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_alert(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_err(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_warn(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_notice(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_info(const struct device *dev, const char *fmt, ...)
-{}
-
-#endif
-
-/*
- * #defines for all the dev_<level> macros to prefix with whatever
- * possible use of #define dev_fmt(fmt) ...
- */
-
-#define dev_emerg(dev, fmt, ...)					\
-	_dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_crit(dev, fmt, ...)						\
-	_dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_alert(dev, fmt, ...)					\
-	_dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_err(dev, fmt, ...)						\
-	_dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_warn(dev, fmt, ...)						\
-	_dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_notice(dev, fmt, ...)					\
-	_dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_info(dev, fmt, ...)						\
-	_dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
-
-#if defined(CONFIG_DYNAMIC_DEBUG)
-#define dev_dbg(dev, fmt, ...)						\
-	dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#elif defined(DEBUG)
-#define dev_dbg(dev, fmt, ...)						\
-	dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
-#else
-#define dev_dbg(dev, fmt, ...)						\
-({									\
-	if (0)								\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-})
-#endif
-
-#ifdef CONFIG_PRINTK
-#define dev_level_once(dev_level, dev, fmt, ...)			\
-do {									\
-	static bool __print_once __read_mostly;				\
-									\
-	if (!__print_once) {						\
-		__print_once = true;					\
-		dev_level(dev, fmt, ##__VA_ARGS__);			\
-	}								\
-} while (0)
-#else
-#define dev_level_once(dev_level, dev, fmt, ...)			\
-do {									\
-	if (0)								\
-		dev_level(dev, fmt, ##__VA_ARGS__);			\
-} while (0)
-#endif
-
-#define dev_emerg_once(dev, fmt, ...)					\
-	dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
-#define dev_alert_once(dev, fmt, ...)					\
-	dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
-#define dev_crit_once(dev, fmt, ...)					\
-	dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
-#define dev_err_once(dev, fmt, ...)					\
-	dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
-#define dev_warn_once(dev, fmt, ...)					\
-	dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
-#define dev_notice_once(dev, fmt, ...)					\
-	dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
-#define dev_info_once(dev, fmt, ...)					\
-	dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
-#define dev_dbg_once(dev, fmt, ...)					\
-	dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
-
-#define dev_level_ratelimited(dev_level, dev, fmt, ...)			\
-do {									\
-	static DEFINE_RATELIMIT_STATE(_rs,				\
-				      DEFAULT_RATELIMIT_INTERVAL,	\
-				      DEFAULT_RATELIMIT_BURST);		\
-	if (__ratelimit(&_rs))						\
-		dev_level(dev, fmt, ##__VA_ARGS__);			\
-} while (0)
-
-#define dev_emerg_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
-#define dev_alert_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
-#define dev_crit_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
-#define dev_err_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
-#define dev_warn_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
-#define dev_notice_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
-#define dev_info_ratelimited(dev, fmt, ...)				\
-	dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
-#if defined(CONFIG_DYNAMIC_DEBUG)
-/* descriptor check is first to prevent flooding with "callbacks suppressed" */
-#define dev_dbg_ratelimited(dev, fmt, ...)				\
-do {									\
-	static DEFINE_RATELIMIT_STATE(_rs,				\
-				      DEFAULT_RATELIMIT_INTERVAL,	\
-				      DEFAULT_RATELIMIT_BURST);		\
-	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);			\
-	if (DYNAMIC_DEBUG_BRANCH(descriptor) &&				\
-	    __ratelimit(&_rs))						\
-		__dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt),	\
-				  ##__VA_ARGS__);			\
-} while (0)
-#elif defined(DEBUG)
-#define dev_dbg_ratelimited(dev, fmt, ...)				\
-do {									\
-	static DEFINE_RATELIMIT_STATE(_rs,				\
-				      DEFAULT_RATELIMIT_INTERVAL,	\
-				      DEFAULT_RATELIMIT_BURST);		\
-	if (__ratelimit(&_rs))						\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-} while (0)
-#else
-#define dev_dbg_ratelimited(dev, fmt, ...)				\
-do {									\
-	if (0)								\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-} while (0)
-#endif
-
-#ifdef VERBOSE_DEBUG
-#define dev_vdbg	dev_dbg
-#else
-#define dev_vdbg(dev, fmt, ...)						\
-({									\
-	if (0)								\
-		dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-})
-#endif
-
-/*
- * dev_WARN*() acts like dev_printk(), but with the key difference of
- * using WARN/WARN_ONCE to include file/line information and a backtrace.
- */
-#define dev_WARN(dev, format, arg...) \
-	WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
-
-#define dev_WARN_ONCE(dev, condition, format, arg...) \
-	WARN_ONCE(condition, "%s %s: " format, \
-			dev_driver_string(dev), dev_name(dev), ## arg)
-
 /* Create alias, so I can be autoloaded. */
 #define MODULE_ALIAS_CHARDEV(major,minor) \
 	MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))