[patch 1/3] kmsg: Kernel message catalog macros.

From: Martin Schwidefsky
Date: Wed Jul 30 2008 - 13:12:38 EST

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From: Michael Holzheu <holzheu@xxxxxxxxxx>
From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>

Introduce a new family of printk macros which prefixes each kmsg message
with a component name and allows to tag the printk with a message id.

The kmsg component name is defined per source file with the KMSG_COMPONENT
macro. The first argument of each kmsg printk is the message id. The
message id "0" is special as it will suppress the message id prefix.

If the message id will be printed to the console / syslog at all depends
on CONFIG_MSG_IDS. If it is "n" then a kmsg_xxx call is just another
printk wrapper. These macros are intended to be used uniformly in the
s390 architecture and the s390 device drivers.

Signed-off-by: Michael Holzheu <holzheu@xxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
---

arch/s390/Kconfig | 9 +++
include/linux/kmsg.h | 124 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 133 insertions(+)

Index: linux-2.6/arch/s390/Kconfig
===================================================================
--- linux-2.6.orig/arch/s390/Kconfig
+++ linux-2.6/arch/s390/Kconfig
@@ -568,6 +568,15 @@ bool "s390 guest support (EXPERIMENTAL)"
select VIRTIO_CONSOLE
help
Select this option if you want to run the kernel under s390 linux
+
+config KMSG_IDS
+ bool "Kernel message numbers"
+ default y
+ help
+ Select this option if you want to include a message number to the
+ prefix for kernel messages issued by the s390 architecture and
+ driver code. See "Documentation/s390/kmsg.txt" for more details.
+
endmenu

source "net/Kconfig"
Index: linux-2.6/include/linux/kmsg.h
===================================================================
--- /dev/null
+++ linux-2.6/include/linux/kmsg.h
@@ -0,0 +1,124 @@
+#ifndef _LINUX_KMSG_H
+#define _LINUX_KMSG_H
+
+#ifndef __KMSG_CHECKER
+#define __KMSG_CHECK(level, id) KERN_##level
+#endif
+
+#if defined(__KMSG_CHECKER) || !defined(CONFIG_KMSG_IDS)
+
+#define kmsg_dev_alert(id, dev, format, arg...) \
+ printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_err(id, dev, format, arg...) \
+ printk(__KMSG_CHECK(ERR, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_warn(id, dev, format, arg...) \
+ printk(__KMSG_CHECK(WARNING, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_info(id, dev, format, arg...) \
+ printk(__KMSG_CHECK(INFO, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_notice(id, dev, format, arg...) \
+ printk(__KMSG_CHECK(NOTICE, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_alert(id, format, arg...) \
+ printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_err(id, format, arg...) \
+ printk(__KMSG_CHECK(ERR, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_warn(id, format, arg...) \
+ printk(__KMSG_CHECK(WARNING, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_info(id, format, arg...) \
+ printk(__KMSG_CHECK(INFO, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_notice(id, format, arg...) \
+ printk(__KMSG_CHECK(NOTICE, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#else /* __KMSG_CHECKER || !CONFIG_KMSG_IDS */
+
+#define kmsg_dev_alert(id, dev, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
+ "." #id ": %s: " format, (dev)->bus_id , ## arg) : \
+ printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_err(id, dev, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(ERR, id) KMSG_COMPONENT \
+ "." #id ": %s: " format, (dev)->bus_id , ## arg) : \
+ printk(__KMSG_CHECK(ERR, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_warn(id, dev, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(WARNING, id) KMSG_COMPONENT \
+ "." #id ": %s: " format, (dev)->bus_id , ## arg) : \
+ printk(__KMSG_CHECK(WARNING, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_info(id, dev, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(INFO, id) KMSG_COMPONENT \
+ "." #id ": %s: " format, (dev)->bus_id , ## arg) : \
+ printk(__KMSG_CHECK(INFO, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_dev_notice(id, dev, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(NOTICE, id) KMSG_COMPONENT \
+ "." #id ": %s: " format, (dev)->bus_id , ## arg) : \
+ printk(__KMSG_CHECK(NOTICE, id) KMSG_COMPONENT \
+ ": %s: " format, (dev)->bus_id , ## arg)
+
+#define kmsg_alert(id, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
+ "." #id ": " format, ## arg) : \
+ printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_err(id, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(ERR, id) KMSG_COMPONENT \
+ "." #id ": " format, ## arg) : \
+ printk(__KMSG_CHECK(ERR, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_warn(id, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(WARNING, id) KMSG_COMPONENT \
+ "." #id ": " format, ## arg) : \
+ printk(__KMSG_CHECK(WARNING, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_info(id, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(INFO, id) KMSG_COMPONENT \
+ "." #id ": " format, ## arg) : \
+ printk(__KMSG_CHECK(INFO, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#define kmsg_notice(id, format, arg...) \
+ (__builtin_constant_p(id) && (id) > 0) ? \
+ printk(__KMSG_CHECK(NOTICE, id) KMSG_COMPONENT \
+ "." #id ": " format, ## arg) : \
+ printk(__KMSG_CHECK(NOTICE, id) KMSG_COMPONENT \
+ ": " format, ## arg)
+
+#endif /* __KMSG_CHECKER || !CONFIG_KMSG_IDS */
+
+#endif /* _LINUX_KMSG_H */

--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.

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Next message: Martin Schwidefsky: "[patch 3/3] kmsg: convert xpram messages to kmsg api."
Previous message: Martin Schwidefsky: "[patch 2/3] kmsg: Kernel message catalog script."
In reply to: Takashi Nishiie: "RE: [patch 2/3] kmsg: Kernel message catalog script."
Next in thread: Greg KH: "Re: [patch 1/3] kmsg: Kernel message catalog macros."
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