[PATCH] dm: improve error message consistency

Tidy device-mapper error messages to include context information
automatically.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/md/dm-zero.c b/drivers/md/dm-zero.c
index 51c0639b2487..ea569f7348d2 100644
--- a/drivers/md/dm-zero.c
+++ b/drivers/md/dm-zero.c
@@ -10,13 +10,15 @@
 #include <linux/init.h>
 #include <linux/bio.h>
 
+#define DM_MSG_PREFIX "zero"
+
 /*
  * Construct a dummy mapping that only returns zeros
  */
 static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 {
         if (argc != 0) {
-                ti->error = "dm-zero: No arguments required";
+                ti->error = "No arguments required";
                 return -EINVAL;
         }
 
@@ -60,7 +62,7 @@ static int __init dm_zero_init(void)
         int r = dm_register_target(&zero_target);
 
         if (r < 0)
-                DMERR("zero: register failed %d", r);
+                DMERR("register failed %d", r);
 
         return r;
 }
@@ -70,7 +72,7 @@ static void __exit dm_zero_exit(void)
         int r = dm_unregister_target(&zero_target);
 
         if (r < 0)
-                DMERR("zero: unregister failed %d", r);
+                DMERR("unregister failed %d", r);
 }
 
 module_init(dm_zero_init)