diff options
| -rw-r--r-- | include/linux/printk.h | 48 | ||||
| -rw-r--r-- | kernel/printk/internal.h | 16 | ||||
| -rw-r--r-- | kernel/printk/nmi.c | 13 | ||||
| -rw-r--r-- | kernel/printk/printk.c | 27 |
4 files changed, 78 insertions, 26 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index 987c65ed34e5..c2158f0f1499 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -257,21 +257,39 @@ extern asmlinkage void dump_stack(void) __cold; * and other debug macros are compiled out unless either DEBUG is defined * or CONFIG_DYNAMIC_DEBUG is set. */ -#define pr_emerg(fmt, ...) \ - printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) -#define pr_alert(fmt, ...) \ - printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) -#define pr_crit(fmt, ...) \ - printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) -#define pr_err(fmt, ...) \ - printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) -#define pr_warning(fmt, ...) \ - 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__) -#define pr_info(fmt, ...) \ - printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) + +#ifdef CONFIG_PRINTK + +asmlinkage __printf(1, 2) __cold void __pr_emerg(const char *fmt, ...); +asmlinkage __printf(1, 2) __cold void __pr_alert(const char *fmt, ...); +asmlinkage __printf(1, 2) __cold void __pr_crit(const char *fmt, ...); +asmlinkage __printf(1, 2) __cold void __pr_err(const char *fmt, ...); +asmlinkage __printf(1, 2) __cold void __pr_warn(const char *fmt, ...); +asmlinkage __printf(1, 2) __cold void __pr_notice(const char *fmt, ...); +asmlinkage __printf(1, 2) __cold void __pr_info(const char *fmt, ...); + +#define pr_emerg(fmt, ...) __pr_emerg(pr_fmt(fmt), ##__VA_ARGS__) +#define pr_alert(fmt, ...) __pr_alert(pr_fmt(fmt), ##__VA_ARGS__) +#define pr_crit(fmt, ...) __pr_crit(pr_fmt(fmt), ##__VA_ARGS__) +#define pr_err(fmt, ...) __pr_err(pr_fmt(fmt), ##__VA_ARGS__) +#define pr_warn(fmt, ...) __pr_warn(pr_fmt(fmt), ##__VA_ARGS__) +#define pr_notice(fmt, ...) __pr_notice(pr_fmt(fmt), ##__VA_ARGS__) +#define pr_info(fmt, ...) __pr_info(pr_fmt(fmt), ##__VA_ARGS__) + +#else + +#define pr_emerg(fmt, ...) printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) +#define pr_alert(fmt, ...) printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_crit(fmt, ...) printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) +#define pr_err(fmt, ...) printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) +#define pr_warn(fmt, ...) printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) +#define pr_notice(fmt, ...) printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) +#define pr_info(fmt, ...) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) + +#endif + +#define pr_warning pr_warn + /* * Like KERN_CONT, pr_cont() should only be used when continuing * a line with no newline ('\n') enclosed. Otherwise it defaults diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h index 7fd2838fa417..5d4505f30083 100644 --- a/kernel/printk/internal.h +++ b/kernel/printk/internal.h @@ -16,9 +16,11 @@ */ #include <linux/percpu.h> -typedef __printf(1, 0) int (*printk_func_t)(const char *fmt, va_list args); +typedef __printf(2, 0) int (*printk_func_t)(int level, const char *fmt, + va_list args); -int __printf(1, 0) vprintk_default(const char *fmt, va_list args); +__printf(2, 0) +int vprintk_default(int level, const char *fmt, va_list args); #ifdef CONFIG_PRINTK_NMI @@ -31,9 +33,10 @@ extern raw_spinlock_t logbuf_lock; * via per-CPU variable. */ DECLARE_PER_CPU(printk_func_t, printk_func); -static inline __printf(1, 0) int vprintk_func(const char *fmt, va_list args) +__printf(2, 0) +static inline int vprintk_func(int level, const char *fmt, va_list args) { - return this_cpu_read(printk_func)(fmt, args); + return this_cpu_read(printk_func)(level, fmt, args); } extern atomic_t nmi_message_lost; @@ -44,9 +47,10 @@ static inline int get_nmi_message_lost(void) #else /* CONFIG_PRINTK_NMI */ -static inline __printf(1, 0) int vprintk_func(const char *fmt, va_list args) +__printf(2, 0) +static inline int vprintk_func(int level, const char *fmt, va_list args) { - return vprintk_default(fmt, args); + return vprintk_default(level, fmt, args); } static inline int get_nmi_message_lost(void) diff --git a/kernel/printk/nmi.c b/kernel/printk/nmi.c index b69eb8a2876f..bc3eeb1ae6da 100644 --- a/kernel/printk/nmi.c +++ b/kernel/printk/nmi.c @@ -58,7 +58,7 @@ static DEFINE_PER_CPU(struct nmi_seq_buf, nmi_print_seq); * one writer running. But the buffer might get flushed from another * CPU, so we need to be careful. */ -static int vprintk_nmi(const char *fmt, va_list args) +static int vprintk_nmi(int level, const char *fmt, va_list args) { struct nmi_seq_buf *s = this_cpu_ptr(&nmi_print_seq); int add = 0; @@ -79,7 +79,16 @@ again: if (!len) smp_rmb(); - add = vsnprintf(s->buffer + len, sizeof(s->buffer) - len, fmt, args); + if (level != LOGLEVEL_DEFAULT) { + add = snprintf(s->buffer + len, sizeof(s->buffer) - len, + KERN_SOH "%c", '0' + level); + add += vsnprintf(s->buffer + len + add, + sizeof(s->buffer) - len - add, + fmt, args); + } else { + add = vsnprintf(s->buffer + len, sizeof(s->buffer) - len, + fmt, args); + } /* * Do it once again if the buffer has been flushed in the meantime. diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 09af62e71fee..d2accf2f4448 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -1801,7 +1801,28 @@ asmlinkage int printk_emit(int facility, int level, } EXPORT_SYMBOL(printk_emit); -int vprintk_default(const char *fmt, va_list args) +#ifdef CONFIG_PRINTK +#define define_pr_level(func, loglevel) \ +asmlinkage __visible void func(const char *fmt, ...) \ +{ \ + va_list args; \ + \ + va_start(args, fmt); \ + vprintk_default(loglevel, fmt, args); \ + va_end(args); \ +} \ +EXPORT_SYMBOL(func) + +define_pr_level(__pr_emerg, LOGLEVEL_EMERG); +define_pr_level(__pr_alert, LOGLEVEL_ALERT); +define_pr_level(__pr_crit, LOGLEVEL_CRIT); +define_pr_level(__pr_err, LOGLEVEL_ERR); +define_pr_level(__pr_warn, LOGLEVEL_WARNING); +define_pr_level(__pr_notice, LOGLEVEL_NOTICE); +define_pr_level(__pr_info, LOGLEVEL_INFO); +#endif + +int vprintk_default(int level, const char *fmt, va_list args) { int r; @@ -1811,7 +1832,7 @@ int vprintk_default(const char *fmt, va_list args) return r; } #endif - r = vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args); + r = vprintk_emit(0, level, NULL, 0, fmt, args); return r; } @@ -1844,7 +1865,7 @@ asmlinkage __visible int printk(const char *fmt, ...) int r; va_start(args, fmt); - r = vprintk_func(fmt, args); + r = vprintk_func(LOGLEVEL_DEFAULT, fmt, args); va_end(args); return r; |