d_path: Make d_path() use a struct path

d_path() is used on a <dentry,vfsmount> pair.  Lets use a struct path to
reflect this.

[akpm@linux-foundation.org: fix build in mm/memory.c]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Acked-by: Bryan Wu <bryan.wu@analog.com>
Acked-by: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 10 insertions, 13 deletions

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index ee32c0e..c6e72ae 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -2853,7 +2853,7 @@ static void compat_ioctl_error(struct file *filp, unsigned int fd,
 	/* find the name of the device. */
 	path = (char *)__get_free_page(GFP_KERNEL);
 	if (path) {
-		fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE);
+		fn = d_path(&filp->f_path, path, PAGE_SIZE);
 		if (IS_ERR(fn))
 			fn = "?";
 	}
diff --git a/fs/dcache.c b/fs/dcache.c
index 170efbc..7b4b080 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1845,8 +1845,7 @@ Elong:
 
 /**
  * d_path - return the path of a dentry
- * @dentry: dentry to report
- * @vfsmnt: vfsmnt to which the dentry belongs
+ * @path: path to report
  * @buf: buffer to return value in
  * @buflen: buffer length
  *
@@ -1857,8 +1856,7 @@ Elong:
  *
  * "buflen" should be positive. Caller holds the dcache_lock.
  */
-char *d_path(struct dentry *dentry, struct vfsmount *vfsmnt,
-	     char *buf, int buflen)
+char *d_path(struct path *path, char *buf, int buflen)
 {
 	char *res;
 	struct path root;
@@ -1870,15 +1868,15 @@ char *d_path(struct dentry *dentry, struct vfsmount *vfsmnt,
 	 * user wants to identify the object in /proc/pid/fd/.  The little hack
 	 * below allows us to generate a name for these objects on demand:
 	 */
-	if (dentry->d_op && dentry->d_op->d_dname)
-		return dentry->d_op->d_dname(dentry, buf, buflen);
+	if (path->dentry->d_op && path->dentry->d_op->d_dname)
+		return path->dentry->d_op->d_dname(path->dentry, buf, buflen);
 
 	read_lock(&current->fs->lock);
 	root = current->fs->root;
 	path_get(&current->fs->root);
 	read_unlock(&current->fs->lock);
 	spin_lock(&dcache_lock);
-	res = __d_path(dentry, vfsmnt, &root, buf, buflen);
+	res = __d_path(path->dentry, path->mnt, &root, buf, buflen);
 	spin_unlock(&dcache_lock);
 	path_put(&root);
 	return res;
diff --git a/fs/dcookies.c b/fs/dcookies.c
index 13c29f1..855d4b1 100644
--- a/fs/dcookies.c
+++ b/fs/dcookies.c
@@ -171,7 +171,7 @@ asmlinkage long sys_lookup_dcookie(u64 cookie64, char __user * buf, size_t len)
 		goto out;
 
 	/* FIXME: (deleted) ? */
-	path = d_path(dcs->path.dentry, dcs->path.mnt, kbuf, PAGE_SIZE);
+	path = d_path(&dcs->path, kbuf, PAGE_SIZE);
 
 	if (IS_ERR(path)) {
 		err = PTR_ERR(path);
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 4a85b40..8a6f7c9 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -345,7 +345,7 @@ static void svc_export_request(struct cache_detail *cd,
 	char *pth;
 
 	qword_add(bpp, blen, exp->ex_client->name);
-	pth = d_path(exp->ex_path.dentry, exp->ex_path.mnt, *bpp, *blen);
+	pth = d_path(&exp->ex_path, *bpp, *blen);
 	if (IS_ERR(pth)) {
 		/* is this correct? */
 		(*bpp)[0] = '\n';
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 47338d9..88f8edf 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1185,7 +1185,7 @@ static int do_proc_readlink(struct path *path, char __user *buffer, int buflen)
 	if (!tmp)
 		return -ENOMEM;
 
-	pathname = d_path(path->dentry, path->mnt, tmp, PAGE_SIZE);
+	pathname = d_path(path, tmp, PAGE_SIZE);
 	len = PTR_ERR(pathname);
 	if (IS_ERR(pathname))
 		goto out;
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 8d86290..8537702 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -346,8 +346,7 @@ int seq_path(struct seq_file *m, struct path *path, char *esc)
 {
 	if (m->count < m->size) {
 		char *s = m->buf + m->count;
-		char *p = d_path(path->dentry, path->mnt, s,
-				 m->size - m->count);
+		char *p = d_path(path, s, m->size - m->count);
 		if (!IS_ERR(p)) {
 			while (s <= p) {
 				char c = *p++;