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Diffstat (limited to 'kernel/printk')
-rw-r--r--kernel/printk/printk.c51
1 files changed, 23 insertions, 28 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 9b896e7a50a9..02d6b6d28796 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -62,9 +62,6 @@ int console_printk[4] = {
CONSOLE_LOGLEVEL_DEFAULT, /* default_console_loglevel */
};
-/* Deferred messaged from sched code are marked by this special level */
-#define SCHED_MESSAGE_LOGLEVEL -2
-
/*
* Low level drivers may need that to know if they can schedule in
* their unblank() callback or not. So let's export it.
@@ -480,7 +477,7 @@ static int syslog_action_restricted(int type)
type != SYSLOG_ACTION_SIZE_BUFFER;
}
-static int check_syslog_permissions(int type, bool from_file)
+int check_syslog_permissions(int type, bool from_file)
{
/*
* If this is from /proc/kmsg and we've already opened it, then we've
@@ -1259,7 +1256,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
int do_syslog(int type, char __user *buf, int len, bool from_file)
{
bool clear = false;
- static int saved_console_loglevel = -1;
+ static int saved_console_loglevel = LOGLEVEL_DEFAULT;
int error;
error = check_syslog_permissions(type, from_file);
@@ -1316,15 +1313,15 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
break;
/* Disable logging to console */
case SYSLOG_ACTION_CONSOLE_OFF:
- if (saved_console_loglevel == -1)
+ if (saved_console_loglevel == LOGLEVEL_DEFAULT)
saved_console_loglevel = console_loglevel;
console_loglevel = minimum_console_loglevel;
break;
/* Enable logging to console */
case SYSLOG_ACTION_CONSOLE_ON:
- if (saved_console_loglevel != -1) {
+ if (saved_console_loglevel != LOGLEVEL_DEFAULT) {
console_loglevel = saved_console_loglevel;
- saved_console_loglevel = -1;
+ saved_console_loglevel = LOGLEVEL_DEFAULT;
}
break;
/* Set level of messages printed to console */
@@ -1336,7 +1333,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
len = minimum_console_loglevel;
console_loglevel = len;
/* Implicitly re-enable logging to console */
- saved_console_loglevel = -1;
+ saved_console_loglevel = LOGLEVEL_DEFAULT;
error = 0;
break;
/* Number of chars in the log buffer */
@@ -1627,10 +1624,10 @@ asmlinkage int vprintk_emit(int facility, int level,
int printed_len = 0;
bool in_sched = false;
/* cpu currently holding logbuf_lock in this function */
- static volatile unsigned int logbuf_cpu = UINT_MAX;
+ static unsigned int logbuf_cpu = UINT_MAX;
- if (level == SCHED_MESSAGE_LOGLEVEL) {
- level = -1;
+ if (level == LOGLEVEL_SCHED) {
+ level = LOGLEVEL_DEFAULT;
in_sched = true;
}
@@ -1695,8 +1692,9 @@ asmlinkage int vprintk_emit(int facility, int level,
const char *end_of_header = printk_skip_level(text);
switch (kern_level) {
case '0' ... '7':
- if (level == -1)
+ if (level == LOGLEVEL_DEFAULT)
level = kern_level - '0';
+ /* fallthrough */
case 'd': /* KERN_DEFAULT */
lflags |= LOG_PREFIX;
}
@@ -1710,7 +1708,7 @@ asmlinkage int vprintk_emit(int facility, int level,
}
}
- if (level == -1)
+ if (level == LOGLEVEL_DEFAULT)
level = default_message_loglevel;
if (dict)
@@ -1788,7 +1786,7 @@ EXPORT_SYMBOL(vprintk_emit);
asmlinkage int vprintk(const char *fmt, va_list args)
{
- return vprintk_emit(0, -1, NULL, 0, fmt, args);
+ return vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
}
EXPORT_SYMBOL(vprintk);
@@ -1817,7 +1815,7 @@ int vprintk_default(const char *fmt, va_list args)
return r;
}
#endif
- r = vprintk_emit(0, -1, NULL, 0, fmt, args);
+ r = vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
return r;
}
@@ -1910,23 +1908,20 @@ DEFINE_PER_CPU(printk_func_t, printk_func);
#ifdef CONFIG_EARLY_PRINTK
struct console *early_console;
-void early_vprintk(const char *fmt, va_list ap)
-{
- if (early_console) {
- char buf[512];
- int n = vscnprintf(buf, sizeof(buf), fmt, ap);
-
- early_console->write(early_console, buf, n);
- }
-}
-
asmlinkage __visible void early_printk(const char *fmt, ...)
{
va_list ap;
+ char buf[512];
+ int n;
+
+ if (!early_console)
+ return;
va_start(ap, fmt);
- early_vprintk(fmt, ap);
+ n = vscnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
+
+ early_console->write(early_console, buf, n);
}
#endif
@@ -2663,7 +2658,7 @@ int printk_deferred(const char *fmt, ...)
preempt_disable();
va_start(args, fmt);
- r = vprintk_emit(0, SCHED_MESSAGE_LOGLEVEL, NULL, 0, fmt, args);
+ r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args);
va_end(args);
__this_cpu_or(printk_pending, PRINTK_PENDING_OUTPUT);