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vfs: make argument of d_real_inode() const 

d_op->d_real() leaves the dentry alone except if the third argument is
non-zero.  Unfortunately very difficult to explain to the compiler without
a cast.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Jeff Layton <jlayton@poochiereds.net>
This commit is contained in:
Miklos Szeredi 2016-09-16 12:44:20 +02:00
parent c568d68341
commit 7b1742eb06
1 changed files with 3 additions and 2 deletions
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5
include/linux/dcache.h
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@ -584,9 +584,10 @@ static inline struct dentry *d_real(struct dentry *dentry,
* If dentry is on an union/overlay, then return the underlying, real inode.
* Otherwise return d_inode().
*/
static inline struct inode *d_real_inode(struct dentry *dentry)
static inline struct inode *d_real_inode(const struct dentry *dentry)
{
return d_backing_inode(d_real(dentry, NULL, 0));
/* This usage of d_real() results in const dentry */
return d_backing_inode(d_real((struct dentry *) dentry, NULL, 0));
}