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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2023-02-02 14:34:13 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2023-02-03 08:59:46 +0100 |
| commit | 094f26c6f4848d141325a80a933dfef4e63adcf9 (patch) | |
| tree | 8f067451a8ebaece641097c720ce73da3806fe4b | |
| parent | d86bbaed71cf8928575b40e4bfa904cded5fa2d2 (diff) | |
| download | barebox-094f26c6f4848d141325a80a933dfef4e63adcf9.tar.gz barebox-094f26c6f4848d141325a80a933dfef4e63adcf9.tar.xz | |
include: linux/printk: implement pr_*_once macros
These are useful as a less verbose alternative to WARN_ONCE, which also
prints a stack trace if possible.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230202133415.319020-1-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | include/linux/printk.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index 2fd6551e0c..a9d1b05f6f 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -94,6 +94,15 @@ static inline int dev_err_probe(struct device *dev, int err, const char *fmt, (level) <= LOGLEVEL ? pr_print((level), (format), ##args) : 0; \ }) +#define __pr_printk_once(level, format, args...) do { \ + static bool __print_once; \ + \ + if (!__print_once && (level) <= LOGLEVEL) { \ + __print_once = true; \ + pr_print((level), (format), ##args); \ + } \ +} while (0) + #ifndef pr_fmt #define pr_fmt(fmt) fmt #endif @@ -110,7 +119,18 @@ static inline int dev_err_probe(struct device *dev, int err, const char *fmt, #define pr_vdebug(fmt, arg...) __pr_printk(8, pr_fmt(fmt), ##arg) #define pr_cont(fmt, arg...) __pr_printk(-1, fmt, ##arg) +#define pr_emerg_once(fmt, arg...) __pr_printk_once(0, pr_fmt(fmt), ##arg) +#define pr_alert_once(fmt, arg...) __pr_printk_once(1, pr_fmt(fmt), ##arg) +#define pr_crit_once(fmt, arg...) __pr_printk_once(2, pr_fmt(fmt), ##arg) +#define pr_err_once(fmt, arg...) __pr_printk_once(3, pr_fmt(fmt), ##arg) +#define pr_warning_once(fmt, arg...) __pr_printk_once(4, pr_fmt(fmt), ##arg) +#define pr_notice_once(fmt, arg...) __pr_printk_once(5, pr_fmt(fmt), ##arg) +#define pr_info_once(fmt, arg...) __pr_printk_once(6, pr_fmt(fmt), ##arg) +#define pr_debug_once(fmt, arg...) __pr_printk_once(7, pr_fmt(fmt), ##arg) +#define pr_vdebug_once(fmt, arg...) __pr_printk_once(8, pr_fmt(fmt), ##arg) + #define pr_warn pr_warning +#define pr_warn_once pr_warning_once int memory_display(const void *addr, loff_t offs, unsigned nbytes, int size, int swab); |