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ovl: use lockless_dereference() for upperdentry

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Don't open code lockless_dereference() in ovl_upperdentry_dereference().

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi 2014-11-20 16:40:01 +01:00
parent 91c7794713
commit 71d509280f
1 changed files with 1 additions and 6 deletions
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7
fs/overlayfs/super.c
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@ -84,12 +84,7 @@ enum ovl_path_type ovl_path_type(struct dentry *dentry)
static struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe) static struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe)
{ {
struct dentry *upperdentry = ACCESS_ONCE(oe->__upperdentry); return lockless_dereference(oe->__upperdentry);
/*
* Make sure to order reads to upperdentry wrt ovl_dentry_update()
*/
smp_read_barrier_depends();
return upperdentry;
} }
void ovl_path_upper(struct dentry *dentry, struct path *path) void ovl_path_upper(struct dentry *dentry, struct path *path)