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-rw-r--r--include/linux/printk.h48
-rw-r--r--kernel/printk/internal.h16
-rw-r--r--kernel/printk/nmi.c13
-rw-r--r--kernel/printk/printk.c27
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;