autofs: path_{get,put}() cleanups

Here are some more places where path_{get,put}() can be used instead of
dput()/mntput() pair.  Besides that it fixes a bug in autofs4_mount_busy()
where mntput() was called before dput().

Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index cfa12db..894fee5 100644 (file)
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -73,8 +73,8 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
        status = 0;
 done:
        DPRINTK("returning = %d", status);
-       mntput(mnt);
        dput(dentry);
+       mntput(mnt);
        return status;
 }
 

diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 6e25003..edf5b6b 100644 (file)
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -146,17 +146,17 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
 
        if (d_mountpoint(dentry)) {
                struct file *fp = NULL;
-               struct vfsmount *fp_mnt = mntget(mnt);
-               struct dentry *fp_dentry = dget(dentry);
+               struct path fp_path = { .dentry = dentry, .mnt = mnt };
 
-               if (!autofs4_follow_mount(&fp_mnt, &fp_dentry)) {
-                       dput(fp_dentry);
-                       mntput(fp_mnt);
+               path_get(&fp_path);
+
+               if (!autofs4_follow_mount(&fp_path.mnt, &fp_path.dentry)) {
+                       path_put(&fp_path);
                        dcache_dir_close(inode, file);
                        goto out;
                }
 
-               fp = dentry_open(fp_dentry, fp_mnt, file->f_flags);
+               fp = dentry_open(fp_path.dentry, fp_path.mnt, file->f_flags);
                status = PTR_ERR(fp);
                if (IS_ERR(fp)) {
                        dcache_dir_close(inode, file);