Patch "vfs: Remove incorrect debugging WARN in prepend_path" has been added to the 4.1-stable tree

This is a note to let you know that I've just added the patch titled

vfs: Remove incorrect debugging WARN in prepend_path

to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
vfs-remove-incorrect-debugging-warn-in-prepend_path.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: "Eric W. Biederman" <[email protected]>
Date: Sun, 24 May 2015 09:25:00 -0500
Subject: vfs: Remove incorrect debugging WARN in prepend_path

From: "Eric W. Biederman" <[email protected]>

commit 93e3bce6287e1fb3e60d3324ed08555b5bbafa89 upstream.

The warning message in prepend_path is unclear and outdated. It was added as a warning that the mechanism for generating names of pseudo files had been removed from prepend_path and d_dname should be used instead. Unfortunately the warning reads like a general warning, making it unclear what to do with it.

Remove the warning. The transition it was added to warn about is long over, and I added code several years ago which in rare cases causes the warning to fire on legitimate code, and the warning is now firing and scaring people for no good reason.

---
 fs/dcache.c |   11 -----------
 1 file changed, 11 deletions(-)

@@ -2927,17 +2927,6 @@ restart:
 				vfsmnt = &mnt->mnt;
 				continue;
 			}
-			/*
-			 * Filesystems needing to implement special "root names"
-			 * should do so with ->d_dname()
-			 */
-			if (IS_ROOT(dentry) &&
-			   (dentry->d_name.len != 1 ||
-			    dentry->d_name.name[0] != '/')) {
-				WARN(1, "Root dentry has weird name <%.*s>\n",
-				     (int) dentry->d_name.len,
-				     dentry->d_name.name);
-			}
 			if (!error)
 				error = is_mounted(vfsmnt) ? 1 : 2;
 			break;

Patches currently in stable-queue which might be from [email protected] are

queue-4.1/vfs-ignore-unlocked-mounts-in-fs_fully_visible.patch queue-4.1/vfs-remove-incorrect-debugging-warn-in-prepend_path.patch