Messages in this thread Patch in this message | | | From | Thomas Weißschuh <> | Subject | [PATCH v2 1/3] printk: introduce new macros pr_<level>_cont() | Date | Fri, 25 Nov 2022 20:09:46 +0100 |
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These macros emit continuation messages with explicit levels. In case the continuation is logged separately from the original message it will retain its level instead of falling back to KERN_DEFAULT.
This remedies the issue that logs filtered by level contain stray continuation messages without context.
Suggested-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> --- include/linux/printk.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/include/linux/printk.h b/include/linux/printk.h index 8c81806c2e99..8f564c38f121 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -537,6 +537,8 @@ struct pi_entry { * This macro expands to a printk with KERN_CONT loglevel. It should only be * used when continuing a log message with no newline ('\n') enclosed. Otherwise * it defaults back to KERN_DEFAULT loglevel. + * + * Use the dedicated pr_<level>_cont() macros instead. */ #define pr_cont(fmt, ...) \ printk(KERN_CONT fmt, ##__VA_ARGS__) @@ -701,6 +703,27 @@ do { \ no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) #endif +/* + * Print a continuation message with level. In case the continuation is split + * from the main message it preserves the level. + */ + +#define pr_emerg_cont(fmt, ...) \ + printk(KERN_EMERG KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_alert_cont(fmt, ...) \ + printk(KERN_ALERT KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_crit_cont(fmt, ...) \ + printk(KERN_CRIT KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_err_cont(fmt, ...) \ + printk(KERN_ERR KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_warn_cont(fmt, ...) \ + printk(KERN_WARN KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_notice_cont(fmt, ...) \ + printk(KERN_NOTICE KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_info_cont(fmt, ...) \ + printk(KERN_INFO KERN_CONT pr_fmt(fmt), ##__VA_ARGS__) +/* no pr_debug_ratelimited, it doesn't make sense with CONFIG_DYNAMIC_DEBUG. */ + extern const struct file_operations kmsg_fops; enum { -- 2.38.1
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