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>

2 files changed, 4 insertions, 12 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index a0585fb6da94..7aeceedcf7d4 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -206,16 +206,10 @@ static void bitmap_checkfree(struct bitmap *bitmap, unsigned long page)
 /* copy the pathname of a file to a buffer */
 char *file_path(struct file *file, char *buf, int count)
 {
-        struct dentry *d;
-        struct vfsmount *v;
-
         if (!buf)
                 return NULL;
 
-        d = file->f_path.dentry;
-        v = file->f_path.mnt;
-
-        buf = d_path(d, v, buf, count);
+        buf = d_path(&file->f_path, buf, count);
 
         return IS_ERR(buf) ? NULL : buf;
 }
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 3301167d4f2a..017a196d041f 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -3563,8 +3563,7 @@ static ssize_t show_file(struct device *dev, struct device_attribute *attr,
 
         down_read(&fsg->filesem);
         if (backing_file_is_open(curlun)) {     // Get the complete pathname
-                p = d_path(curlun->filp->f_path.dentry,
-                                curlun->filp->f_path.mnt, buf, PAGE_SIZE - 1);
+                p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
                 if (IS_ERR(p))
                         rc = PTR_ERR(p);
                 else {
@@ -3981,9 +3980,8 @@ static int __init fsg_bind(struct usb_gadget *gadget)
                 if (backing_file_is_open(curlun)) {
                         p = NULL;
                         if (pathbuf) {
-                                p = d_path(curlun->filp->f_path.dentry,
-                                        curlun->filp->f_path.mnt,
-                                        pathbuf, PATH_MAX);
+                                p = d_path(&curlun->filp->f_path,
+                                           pathbuf, PATH_MAX);
                                 if (IS_ERR(p))
                                         p = NULL;
                         }