linux-kernel - [PATCH 02/11] dynamic_debug: trim source-path prefix from dynamic

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Date:	Tue, 28 Jun 2011 01:09:43 -0600
From:	Jim Cromie <jim.cromie@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	gnb@...h.org, jbaron@...hat.com, bvanassche@....org,
	gregkh@...e.de, Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH 02/11] dynamic_debug: trim source-path prefix from dynamic_debug/control

Skip past unchanging absolute source-path prefix to print a path
thats relative to kernel source's root-dir.  This makes the file
easier to read without a wide screen.  For example:

kernel/freezer.c:128 [freezer]cancel_freezing - "  clean up: %s\012"

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index a3b08d5..eb08a2f 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -601,6 +601,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
 	struct ddebug_iter *iter = m->private;
 	struct _ddebug *dp = p;
 	char flagsbuf[8];
+	const int offset = strlen(__FILE__) - strlen("lib/dynamic_debug.c");
 
 	if (verbose)
 		printk(KERN_INFO "%s: called m=%p p=%p\n",
@@ -613,7 +614,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
 	}
 
 	seq_printf(m, "%s:%u [%s]%s %s \"",
-		   dp->filename, dp->lineno,
+		   dp->filename + offset, dp->lineno,
 		   iter->table->mod_name, dp->function,
 		   ddebug_describe_flags(dp, flagsbuf, sizeof(flagsbuf)));
 	seq_escape(m, dp->format, "\t\r\n\"");
-- 
1.7.4.1

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