SUNRPC: introduce xdr_init_decode_pages

Initialize xdr_stream and xdr_buf using an array of page pointers
and length of buffer.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index 5914659c8ec5..3b7bf1377264 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -308,12 +308,7 @@ decode_device(struct inode *ino, struct pnfs_device *pdev, gfp_t gfp_flags)
         u8 max_stripe_index;
         struct nfs4_file_layout_dsaddr *dsaddr = NULL;
         struct xdr_stream stream;
-        struct xdr_buf buf = {
-                .pages = pdev->pages,
-                .page_len = pdev->pglen,
-                .buflen = pdev->pglen,
-                .len = pdev->pglen,
-        };
+        struct xdr_buf buf;
         struct page *scratch;
 
         /* set up xdr stream */
@@ -321,7 +316,7 @@ decode_device(struct inode *ino, struct pnfs_device *pdev, gfp_t gfp_flags)
         if (!scratch)
                 goto out_err;
 
-        xdr_init_decode(&stream, &buf, NULL);
+        xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen);
         xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
 
         /* Get the stripe count (number of stripe index) */