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authorJim Cromie <jim.cromie@gmail.com>2011-12-19 17:13:12 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-24 12:48:55 -0800
commit2b6783191da7211c88f98eb1a2bd2027bff36e30 (patch)
tree3227bbc5c9c187b6dbaa133a6f7e2e4364942594 /Documentation/dynamic-debug-howto.txt
parent7281491c594e7b8501eb5dfcf6cd3724f8a1b5b0 (diff)
downloadlinux-2b6783191da7211c88f98eb1a2bd2027bff36e30.tar.gz
dynamic_debug: add trim_prefix() to provide source-root relative paths
trim_prefix(path) skips past the absolute source path root, and returns the pointer to the relative path from there. It is used to shorten the displayed path in $DBGMT/dynamic_debug/control via ddebug_proc_show(), and in ddebug_change() to allow relative filenames to be used in applied queries. For example: ~# echo file kernel/freezer.c +p > $DBGMT/dynamic_debug/control kernel/freezer.c:128 [freezer]cancel_freezing p " clean up: %s\012" trim_prefix(path) insures common prefix before trimming it, so out-of-tree module paths are shown as full absolute paths. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/dynamic-debug-howto.txt')
-rw-r--r--Documentation/dynamic-debug-howto.txt7
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/dynamic-debug-howto.txt b/Documentation/dynamic-debug-howto.txt
index f959909d715..378b5d1bf43 100644
--- a/Documentation/dynamic-debug-howto.txt
+++ b/Documentation/dynamic-debug-howto.txt
@@ -144,11 +144,12 @@ func
func svc_tcp_accept
file
- The given string is compared against either the full
- pathname or the basename of the source file of each
- callsite. Examples:
+ The given string is compared against either the full pathname, the
+ src-root relative pathname, or the basename of the source file of
+ each callsite. Examples:
file svcsock.c
+ file kernel/freezer.c
file /usr/src/packages/BUILD/sgi-enhancednfs-1.4/default/net/sunrpc/svcsock.c
module