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Date: Sun, 02 Nov 2014 13:42:34 -0800
From: Joe Perches <joe@...ches.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Greg KH <gregkh@...uxfoundation.org>,
Jason Baron <jbaron@...mai.com>,
linux-usb <linux-usb@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] printk: Add and use LOGLEVEL_<level> defines for
KERN_<LEVEL> equivalents
Use #defines instead of magic values.
Signed-off-by: Joe Perches <joe@...ches.com>
---
drivers/usb/storage/debug.c | 2 +-
include/linux/kern_levels.h | 13 +++++++++++++
kernel/printk/printk.c | 28 +++++++++++++---------------
lib/dynamic_debug.c | 4 ++--
4 files changed, 29 insertions(+), 18 deletions(-)
diff --git a/drivers/usb/storage/debug.c b/drivers/usb/storage/debug.c
index e08f647..e43a956 100644
--- a/drivers/usb/storage/debug.c
+++ b/drivers/usb/storage/debug.c
@@ -186,7 +186,7 @@ int usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
va_start(args, fmt);
- r = dev_vprintk_emit(7, &us->pusb_dev->dev, fmt, args);
+ r = dev_vprintk_emit(LOGLEVEL_DEBUG, &us->pusb_dev->dev, fmt, args);
va_end(args);
diff --git a/include/linux/kern_levels.h b/include/linux/kern_levels.h
index 866caaa..3b9e71f 100644
--- a/include/linux/kern_levels.h
+++ b/include/linux/kern_levels.h
@@ -22,4 +22,17 @@
*/
#define KERN_CONT ""
+/* integer equivalents of KERN_<LEVEL> */
+#define LOGLEVEL_SCHED -2 /* Deferred messages from sched code
+ * are set to this special level */
+#define LOGLEVEL_DEFAULT -1 /* default (or last) loglevel */
+#define LOGLEVEL_EMERG 0 /* system is unusable */
+#define LOGLEVEL_ALERT 1 /* action must be taken immediately */
+#define LOGLEVEL_CRIT 2 /* critical conditions */
+#define LOGLEVEL_ERR 3 /* error conditions */
+#define LOGLEVEL_WARNING 4 /* warning conditions */
+#define LOGLEVEL_NOTICE 5 /* normal but significant condition */
+#define LOGLEVEL_INFO 6 /* informational */
+#define LOGLEVEL_DEBUG 7 /* debug-level messages */
+
#endif
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index ced2b84..2b8606e 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.
@@ -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 */
@@ -1629,8 +1626,8 @@ asmlinkage int vprintk_emit(int facility, int level,
/* cpu currently holding logbuf_lock in this function */
static volatile 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);
@@ -1842,7 +1840,7 @@ asmlinkage __visible int printk(const char *fmt, ...)
}
#endif
va_start(args, fmt);
- r = vprintk_emit(0, -1, NULL, 0, fmt, args);
+ r = vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
va_end(args);
return r;
@@ -2634,7 +2632,7 @@ 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);
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index dfba055..527799d 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -576,7 +576,7 @@ void __dynamic_dev_dbg(struct _ddebug *descriptor,
} else {
char buf[PREFIX_SIZE];
- dev_printk_emit(7, dev, "%s%s %s: %pV",
+ dev_printk_emit(LOGLEVEL_DEBUG, dev, "%s%s %s: %pV",
dynamic_emit_prefix(descriptor, buf),
dev_driver_string(dev), dev_name(dev),
&vaf);
@@ -605,7 +605,7 @@ void __dynamic_netdev_dbg(struct _ddebug *descriptor,
if (dev && dev->dev.parent) {
char buf[PREFIX_SIZE];
- dev_printk_emit(7, dev->dev.parent,
+ dev_printk_emit(LOGLEVEL_DEBUG, dev->dev.parent,
"%s%s %s %s%s: %pV",
dynamic_emit_prefix(descriptor, buf),
dev_driver_string(dev->dev.parent),
--
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