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Commit 2b2f68b5 authored by Florian Ragwitz's avatar Florian Ragwitz Committed by Linus Torvalds
Browse files

DYNAMIC_DEBUG: fix documentation errors 



[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: default avatarFlorian Ragwitz <rafl@debian.org>
Cc: Jason Baron <jbaron@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ea46c8f7

include/linux/dynamic_debug.h

+1 −1
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ struct _ddebug { 
	/*

 	 * The flags field controls the behaviour at the callsite.

 	 * The bits here are changed dynamically when the user

 	 * writes commands to <debugfs>/dynamic_debug/ddebug

	 * writes commands to <debugfs>/dynamic_debug/control

	 */

#define _DPRINTK_FLAGS_PRINT   (1<<0)  /* printk() a message using the format */

#define _DPRINTK_FLAGS_DEFAULT 0

lib/Kconfig.debug

+8 −8
Original line number Diff line number Diff line
@@ -1039,10 +1039,10 @@ config DYNAMIC_DEBUG 


	  Usage:



	  Dynamic debugging is controlled via the 'dynamic_debug/ddebug' file,

	  Dynamic debugging is controlled via the 'dynamic_debug/control' file,

	  which is contained in the 'debugfs' filesystem. Thus, the debugfs

	  filesystem must first be mounted before making use of this feature.

	  We refer the control file as: <debugfs>/dynamic_debug/ddebug. This

	  We refer the control file as: <debugfs>/dynamic_debug/control. This

	  file contains a list of the debug statements that can be enabled. The

	  format for each line of the file is:
@@ -1057,7 +1057,7 @@ config DYNAMIC_DEBUG 


	  From a live system:



		nullarbor:~ # cat <debugfs>/dynamic_debug/ddebug

		nullarbor:~ # cat <debugfs>/dynamic_debug/control

		# filename:lineno [module]function flags format

		fs/aio.c:222 [aio]__put_ioctx - "__put_ioctx:\040freeing\040%p\012"

		fs/aio.c:248 [aio]ioctx_alloc - "ENOMEM:\040nr_events\040too\040high\012"
@@ -1067,23 +1067,23 @@ config DYNAMIC_DEBUG 


		// enable the message at line 1603 of file svcsock.c

		nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >

						<debugfs>/dynamic_debug/ddebug

						<debugfs>/dynamic_debug/control



		// enable all the messages in file svcsock.c

		nullarbor:~ # echo -n 'file svcsock.c +p' >

						<debugfs>/dynamic_debug/ddebug

						<debugfs>/dynamic_debug/control



		// enable all the messages in the NFS server module

		nullarbor:~ # echo -n 'module nfsd +p' >

						<debugfs>/dynamic_debug/ddebug

						<debugfs>/dynamic_debug/control



		// enable all 12 messages in the function svc_process()

		nullarbor:~ # echo -n 'func svc_process +p' >

						<debugfs>/dynamic_debug/ddebug

						<debugfs>/dynamic_debug/control



		// disable all 12 messages in the function svc_process()

		nullarbor:~ # echo -n 'func svc_process -p' >

						<debugfs>/dynamic_debug/ddebug

						<debugfs>/dynamic_debug/control



	  See Documentation/dynamic-debug-howto.txt for additional information.