orangefs_copy_{to,from}_bufmap(): don't pass bufmap pointer

it's always __orangefs_bufmap
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>

fs/orangefs/file.c

@@ -21,8 +21,7 @@
  *       can futher be kernel-space or user-space addresses.
  *       or it can pointers to struct page's
  */
-static int precopy_buffers(struct orangefs_bufmap *bufmap,
-			   int buffer_index,
+static int precopy_buffers(int buffer_index,
 			   struct iov_iter *iter,
 			   size_t total_size)
 {
@@ -34,8 +33,7 @@ static int precopy_buffers(struct orangefs_bufmap *bufmap,
 
 
 	if (total_size) {
-		ret = orangefs_bufmap_copy_from_iovec(bufmap,
-						      iter,
+		ret = orangefs_bufmap_copy_from_iovec(iter,
 						      buffer_index,
 						      total_size);
 		if (ret < 0)
@@ -58,8 +56,7 @@ static int precopy_buffers(struct orangefs_bufmap *bufmap,
  *       can futher be kernel-space or user-space addresses.
  *       or it can pointers to struct page's
  */
-static int postcopy_buffers(struct orangefs_bufmap *bufmap,
-			    int buffer_index,
+static int postcopy_buffers(int buffer_index,
 			    struct iov_iter *iter,
 			    size_t total_size)
 {
@@ -70,8 +67,7 @@ static int postcopy_buffers(struct orangefs_bufmap *bufmap,
 	 * struct page pointers.
 	 */
 	if (total_size) {
-		ret = orangefs_bufmap_copy_to_iovec(bufmap,
-						    iter,
+		ret = orangefs_bufmap_copy_to_iovec(iter,
 						    buffer_index,
 						    total_size);
 		if (ret < 0)
@@ -138,8 +134,7 @@ static ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inod
 	 * precopy_buffers only pertains to writes.
 	 */
 	if (type == ORANGEFS_IO_WRITE) {
-		ret = precopy_buffers(bufmap,
-				      buffer_index,
+		ret = precopy_buffers(buffer_index,
 				      iter,
 				      total_size);
 		if (ret < 0)
@@ -242,8 +237,7 @@ static ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inod
 	 * postcopy_buffers only pertains to reads.
 	 */
 	if (type == ORANGEFS_IO_READ) {
-		ret = postcopy_buffers(bufmap,
-				       buffer_index,
+		ret = postcopy_buffers(buffer_index,
 				       iter,
 				       new_op->downcall.resp.io.amt_complete);
 		if (ret < 0)

fs/orangefs/orangefs-bufmap.c

@@ -511,19 +511,18 @@ void orangefs_readdir_index_put(int buffer_index)
  * we've been handed an iovec, we need to copy it to 
  * the shared memory descriptor at "buffer_index".
  */
-int orangefs_bufmap_copy_from_iovec(struct orangefs_bufmap *bufmap,
-				struct iov_iter *iter,
+int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
 				int buffer_index,
 				size_t size)
 {
-	struct orangefs_bufmap_desc *to = &bufmap->desc_array[buffer_index];
+	struct orangefs_bufmap_desc *to;
 	int i;
 
 	gossip_debug(GOSSIP_BUFMAP_DEBUG,
 		     "%s: buffer_index:%d: size:%zu:\n",
 		     __func__, buffer_index, size);
 
-
+	to = &__orangefs_bufmap->desc_array[buffer_index];
 	for (i = 0; size; i++) {
 		struct page *page = to->page_array[i];
 		size_t n = size;
@@ -542,14 +541,14 @@ int orangefs_bufmap_copy_from_iovec(struct orangefs_bufmap *bufmap,
  * we've been handed an iovec, we need to fill it from
  * the shared memory descriptor at "buffer_index".
  */
-int orangefs_bufmap_copy_to_iovec(struct orangefs_bufmap *bufmap,
-				    struct iov_iter *iter,
+int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
 				    int buffer_index,
 				    size_t size)
 {
-	struct orangefs_bufmap_desc *from = &bufmap->desc_array[buffer_index];
+	struct orangefs_bufmap_desc *from;
 	int i;
 
+	from = &__orangefs_bufmap->desc_array[buffer_index];
 	gossip_debug(GOSSIP_BUFMAP_DEBUG,
 		     "%s: buffer_index:%d: size:%zu:\n",
 		     __func__, buffer_index, size);

fs/orangefs/orangefs-bufmap.h

@@ -27,13 +27,11 @@ int orangefs_readdir_index_get(struct orangefs_bufmap **mapp, int *buffer_index)
 
 void orangefs_readdir_index_put(int buffer_index);
 
-int orangefs_bufmap_copy_from_iovec(struct orangefs_bufmap *bufmap,
-				struct iov_iter *iter,
+int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
 				int buffer_index,
 				size_t size);
 
-int orangefs_bufmap_copy_to_iovec(struct orangefs_bufmap *bufmap,
-			      struct iov_iter *iter,
+int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
 			      int buffer_index,
 			      size_t size);