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locks: consolidate "nolease" routines

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GFS2 and NFS have setlease routines that always just return -EINVAL.
Turn that into a generic routine that can live in fs/libfs.c.

Cc: <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
Acked-by: Trond Myklebust <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Jeff Layton 2014-08-27 06:49:41 -04:00
commit 1c994a0909
6 changed files with 20 additions and 35 deletions
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16
fs/libfs.c
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@ -1075,3 +1075,19 @@ struct inode *alloc_anon_inode(struct super_block *s)
return inode;
}
EXPORT_SYMBOL(alloc_anon_inode);
/**
* simple_nosetlease - generic helper for prohibiting leases
* @filp: file pointer
* @arg: type of lease to obtain
* @flp: new lease supplied for insertion
*
* Generic helper for filesystems that do not wish to allow leases to be set.
* All arguments are ignored and it just returns -EINVAL.
*/
int
simple_nosetlease(struct file *filp, long arg, struct file_lock **flp)
{
return -EINVAL;
}
EXPORT_SYMBOL(simple_nosetlease);