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authorJ. Bruce Fields <bfields@redhat.com>2012-04-18 15:16:33 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-11-09 00:16:39 -0500
commit375e289ea85166c5241c570940e7e7e966c63a9f (patch)
tree406c6701e7a45a809114bfb925f474bdd20d252a /include/linux/fs.h
parentf27c9298fd717e1f7e63e314a7a85a3a7e77139d (diff)
downloadlinux-linaro-stable-375e289ea85166c5241c570940e7e7e966c63a9f.tar.gz
vfs: pull ext4's double-i_mutex-locking into common code
We want to do this elsewhere as well. Also catch any attempts to use it for directories (where this ordering would conflict with ancestor-first directory ordering in lock_rename). Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Dave Chinner <david@fromorbit.com> Acked-by: Jeff Layton <jlayton@redhat.com> Acked-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5e44b0893db8..4e1a0b41f966 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -637,6 +637,9 @@ enum inode_i_mutex_lock_class
I_MUTEX_QUOTA
};
+void lock_two_nondirectories(struct inode *, struct inode*);
+void unlock_two_nondirectories(struct inode *, struct inode*);
+
/*
* NOTE: in a 32bit arch with a preemptable kernel and
* an UP compile the i_size_read/write must be atomic