1 files changed, 21 insertions, 23 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 996dd89..0108cf4 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -33,7 +33,6 @@
 #include <linux/namei.h>
 #include <linux/mount.h>
 #include <linux/sched.h>
-#include <linux/vmalloc.h>
 #include <linux/kmemleak.h>
 
 #include "delegation.h"
@@ -459,25 +458,26 @@ out:
 /* Perform conversion from xdr to cache array */
 static
 int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry,
-				void *xdr_page, struct page *page, unsigned int buflen)
+				struct page **xdr_pages, struct page *page, unsigned int buflen)
 {
 	struct xdr_stream stream;
-	struct xdr_buf buf;
-	__be32 *ptr = xdr_page;
+	struct xdr_buf buf = {
+		.pages = xdr_pages,
+		.page_len = buflen,
+		.buflen = buflen,
+		.len = buflen,
+	};
+	struct page *scratch;
 	struct nfs_cache_array *array;
 	unsigned int count = 0;
 	int status;
 
-	buf.head->iov_base = xdr_page;
-	buf.head->iov_len = buflen;
-	buf.tail->iov_len = 0;
-	buf.page_base = 0;
-	buf.page_len = 0;
-	buf.buflen = buf.head->iov_len;
-	buf.len = buf.head->iov_len;
-
-	xdr_init_decode(&stream, &buf, ptr);
+	scratch = alloc_page(GFP_KERNEL);
+	if (scratch == NULL)
+		return -ENOMEM;
 
+	xdr_init_decode(&stream, &buf, NULL);
+	xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
 
 	do {
 		status = xdr_decode(desc, entry, &stream);
@@ -506,6 +506,8 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
 		} else
 			status = PTR_ERR(array);
 	}
+
+	put_page(scratch);
 	return status;
 }
 
@@ -521,7 +523,6 @@ static
 void nfs_readdir_free_large_page(void *ptr, struct page **pages,
 		unsigned int npages)
 {
-	vm_unmap_ram(ptr, npages);
 	nfs_readdir_free_pagearray(pages, npages);
 }
 
@@ -530,9 +531,8 @@ void nfs_readdir_free_large_page(void *ptr, struct page **pages,
  * to nfs_readdir_free_large_page
  */
 static
-void *nfs_readdir_large_page(struct page **pages, unsigned int npages)
+int nfs_readdir_large_page(struct page **pages, unsigned int npages)
 {
-	void *ptr;
 	unsigned int i;
 
 	for (i = 0; i < npages; i++) {
@@ -541,13 +541,11 @@ void *nfs_readdir_large_page(struct page **pages, unsigned int npages)
 			goto out_freepages;
 		pages[i] = page;
 	}
+	return 0;
 
-	ptr = vm_map_ram(pages, npages, 0, PAGE_KERNEL);
-	if (!IS_ERR_OR_NULL(ptr))
-		return ptr;
 out_freepages:
 	nfs_readdir_free_pagearray(pages, i);
-	return NULL;
+	return -ENOMEM;
 }
 
 static
@@ -577,8 +575,8 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page,
 	memset(array, 0, sizeof(struct nfs_cache_array));
 	array->eof_index = -1;
 
-	pages_ptr = nfs_readdir_large_page(pages, array_size);
-	if (!pages_ptr)
+	status = nfs_readdir_large_page(pages, array_size);
+	if (status < 0)
 		goto out_release_array;
 	do {
 		unsigned int pglen;
@@ -587,7 +585,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page,
 		if (status < 0)
 			break;
 		pglen = status;
-		status = nfs_readdir_page_filler(desc, &entry, pages_ptr, page, pglen);
+		status = nfs_readdir_page_filler(desc, &entry, pages, page, pglen);
 		if (status < 0) {
 			if (status == -ENOSPC)
 				status = 0;