linux-kernel - [PATCH REGRESSION 4.12-rc1] ovl: add missing CONFIG

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Date:   Tue, 16 May 2017 12:11:39 +0200
From:   Ralph Sennhauser <ralph.sennhauser@...il.com>
To:     Amir Goldstein <amir73il@...il.com>
Cc:     Ralph Sennhauser <ralph.sennhauser@...il.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        linux-unionfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH REGRESSION 4.12-rc1] ovl: add missing CONFIG_EXPORTFS dependency

The source files namei.c and copy_up.c in overlayfs new use
exportfs_decode_fh which depends on CONFIG_EXPORTFS being set. Select it
in Kconfig.

Fixes: a9d019573e88 ("ovl: lookup non-dir copy-up-origin by file handle")
Fixes: 3a1e819b4e80 ("ovl: store file handle of lower inode on copy up")
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@...il.com>
---
 fs/overlayfs/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/overlayfs/Kconfig b/fs/overlayfs/Kconfig
index 0daac51..c0c9683 100644
--- a/fs/overlayfs/Kconfig
+++ b/fs/overlayfs/Kconfig
@@ -1,5 +1,6 @@
 config OVERLAY_FS
 	tristate "Overlay filesystem support"
+	select EXPORTFS
 	help
 	  An overlay filesystem combines two filesystems - an 'upper' filesystem
 	  and a 'lower' filesystem.  When a name exists in both filesystems, the
-- 
2.10.2