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ceabef7dd7
Instead of enabling dynamic debug globally with CONFIG_DYNAMIC_DEBUG, CONFIG_DYNAMIC_DEBUG_CORE will only enable core function of dynamic debug. With the DYNAMIC_DEBUG_MODULE defined for any modules, dynamic debug will be tied to them. This is useful for people who only want to enable dynamic debug for kernel modules without worrying about kernel image size and memory consumption is increasing too much. [orson.zhai@unisoc.com: v2] Link: http://lkml.kernel.org/r/1587408228-10861-1-git-send-email-orson.unisoc@gmail.com Signed-off-by: Orson Zhai <orson.zhai@unisoc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Petr Mladek <pmladek@suse.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jason Baron <jbaron@akamai.com> Cc: Randy Dunlap <rdunlap@infradead.org> Link: http://lkml.kernel.org/r/1586521984-5890-1-git-send-email-orson.unisoc@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
238 lines
7.5 KiB
C
238 lines
7.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* dev_printk.h - printk messages helpers for devices
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*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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* Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
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* Copyright (c) 2008-2009 Novell Inc.
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*
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*/
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#ifndef _DEVICE_PRINTK_H_
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#define _DEVICE_PRINTK_H_
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/ratelimit.h>
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#ifndef dev_fmt
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#define dev_fmt(fmt) fmt
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#endif
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struct device;
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#ifdef CONFIG_PRINTK
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__printf(3, 0) __cold
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int dev_vprintk_emit(int level, const struct device *dev,
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const char *fmt, va_list args);
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__printf(3, 4) __cold
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int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
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__printf(3, 4) __cold
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void dev_printk(const char *level, const struct device *dev,
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const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_emerg(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_alert(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_crit(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_err(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_warn(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_notice(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_info(const struct device *dev, const char *fmt, ...);
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#else
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static inline __printf(3, 0)
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int dev_vprintk_emit(int level, const struct device *dev,
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const char *fmt, va_list args)
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{ return 0; }
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static inline __printf(3, 4)
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int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
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{ return 0; }
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static inline void __dev_printk(const char *level, const struct device *dev,
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struct va_format *vaf)
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{}
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static inline __printf(3, 4)
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void dev_printk(const char *level, const struct device *dev,
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const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_emerg(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_crit(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_alert(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_err(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_warn(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_notice(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_info(const struct device *dev, const char *fmt, ...)
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{}
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#endif
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/*
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* #defines for all the dev_<level> macros to prefix with whatever
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* possible use of #define dev_fmt(fmt) ...
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*/
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#define dev_emerg(dev, fmt, ...) \
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_dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_crit(dev, fmt, ...) \
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_dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_alert(dev, fmt, ...) \
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_dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_err(dev, fmt, ...) \
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_dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_warn(dev, fmt, ...) \
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_dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_notice(dev, fmt, ...) \
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_dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_info(dev, fmt, ...) \
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_dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#if defined(CONFIG_DYNAMIC_DEBUG) || \
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(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
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#define dev_dbg(dev, fmt, ...) \
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dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#elif defined(DEBUG)
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#define dev_dbg(dev, fmt, ...) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#else
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#define dev_dbg(dev, fmt, ...) \
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({ \
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if (0) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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})
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#endif
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#ifdef CONFIG_PRINTK
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#define dev_level_once(dev_level, dev, fmt, ...) \
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do { \
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static bool __print_once __read_mostly; \
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\
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if (!__print_once) { \
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__print_once = true; \
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dev_level(dev, fmt, ##__VA_ARGS__); \
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} \
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} while (0)
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#else
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#define dev_level_once(dev_level, dev, fmt, ...) \
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do { \
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if (0) \
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dev_level(dev, fmt, ##__VA_ARGS__); \
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} while (0)
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#endif
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#define dev_emerg_once(dev, fmt, ...) \
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dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
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#define dev_alert_once(dev, fmt, ...) \
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dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
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#define dev_crit_once(dev, fmt, ...) \
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dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
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#define dev_err_once(dev, fmt, ...) \
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dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
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#define dev_warn_once(dev, fmt, ...) \
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dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
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#define dev_notice_once(dev, fmt, ...) \
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dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
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#define dev_info_once(dev, fmt, ...) \
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dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
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#define dev_dbg_once(dev, fmt, ...) \
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dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
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#define dev_level_ratelimited(dev_level, dev, fmt, ...) \
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do { \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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if (__ratelimit(&_rs)) \
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dev_level(dev, fmt, ##__VA_ARGS__); \
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} while (0)
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#define dev_emerg_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
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#define dev_alert_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
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#define dev_crit_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
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#define dev_err_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
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#define dev_warn_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
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#define dev_notice_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
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#define dev_info_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
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#if defined(CONFIG_DYNAMIC_DEBUG) || \
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(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
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/* descriptor check is first to prevent flooding with "callbacks suppressed" */
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#define dev_dbg_ratelimited(dev, fmt, ...) \
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do { \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
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if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
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__ratelimit(&_rs)) \
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__dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt), \
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##__VA_ARGS__); \
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} while (0)
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#elif defined(DEBUG)
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#define dev_dbg_ratelimited(dev, fmt, ...) \
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do { \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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if (__ratelimit(&_rs)) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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} while (0)
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#else
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#define dev_dbg_ratelimited(dev, fmt, ...) \
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do { \
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if (0) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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} while (0)
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#endif
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#ifdef VERBOSE_DEBUG
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#define dev_vdbg dev_dbg
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#else
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#define dev_vdbg(dev, fmt, ...) \
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({ \
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if (0) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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})
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#endif
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/*
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* dev_WARN*() acts like dev_printk(), but with the key difference of
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* using WARN/WARN_ONCE to include file/line information and a backtrace.
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*/
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#define dev_WARN(dev, format, arg...) \
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WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
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#define dev_WARN_ONCE(dev, condition, format, arg...) \
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WARN_ONCE(condition, "%s %s: " format, \
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dev_driver_string(dev), dev_name(dev), ## arg)
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#endif /* _DEVICE_PRINTK_H_ */
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