[PATCH] md: include sector number in messages about corrected read errors

This is generally useful, but particularly helps see if it is the same sector
that always needs correcting, or different ones.

[akpm@osdl.org: fix printk warnings]
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/md/raid10.c

@@ -1492,6 +1492,10 @@ static void raid10d(mddev_t *mddev)
 									 s<<9, conf->tmppage, READ) == 0)
 								/* Well, this device is dead */
 								md_error(mddev, rdev);
+							else
+								printk(KERN_INFO "raid10:%s: read error corrected (%d sectors at %llu on %s)\n",
+								       mdname(mddev), s, (unsigned long long)(sect+rdev->data_offset), bdevname(rdev->bdev, b));
+
 							rdev_dec_pending(rdev, mddev);
 							rcu_read_lock();
 						}