[PATCH] NFS: remove broken O_DIRECT wait code

It is in any case no longer needed.

fs/nfs/direct.c

@@ -123,7 +123,6 @@ nfs_iov2pagelist(int rw, const struct inode *inode,
 
 		page_count = nfs_get_user_pages(user_addr, bytes, &pages, rw);
 		if (page_count < 0) {
-			nfs_release_list(requests);
 			return page_count;
 		}
 
@@ -201,7 +200,6 @@ do_nfs_direct_IO(int rw, const struct inode *inode,
 			break;
 		}
 		result = nfs_pagein_list(&requests, NFS_SERVER(inode)->rpages);
-		nfs_wait_for_reads(&requests);
 		break;
 	case WRITE:
 		if (IS_SYNC(inode) || (NFS_SERVER(inode)->wsize < PAGE_SIZE))

fs/nfs/pagelist.c

@@ -153,26 +153,6 @@ nfs_release_request(struct nfs_page *req)
 	nfs_page_free(req);
 }
 
-/**
- * nfs_release_list - cleanly dispose of an unattached list of page requests
- * @list: list of doomed page requests
- */
-void
-nfs_release_list(struct list_head *list)
-{
-	while (!list_empty(list)) {
-		struct nfs_page *req = nfs_list_entry(list);
-
-		nfs_list_remove_request(req);
-
-		page_cache_release(req->wb_page);
-
-		/* Release struct file or cached credential */
-		nfs_clear_request(req);
-		nfs_page_free(req);
-	}
-}
-
 /**
  * nfs_list_add_request - Insert a request into a sorted list
  * @req: request
@@ -221,37 +201,6 @@ nfs_wait_on_request(struct nfs_page *req)
 	return nfs_wait_event(clnt, req->wb_wait, !NFS_WBACK_BUSY(req));
 }
 
-/**
- * nfs_wait_for_reads - wait for outstanding requests to complete
- * @head: list of page requests to wait for
- */
-int
-nfs_wait_for_reads(struct list_head *head)
-{
-	struct list_head *p = head->next;
-	unsigned int res = 0;
-
-	while (p != head) {
-		struct nfs_page *req = nfs_list_entry(p);
-		int error;
-
-		if (!NFS_WBACK_BUSY(req))
-			continue;
-
-		req->wb_count++;
-		error = nfs_wait_on_request(req);
-		if (error < 0)
-			return error;
-		nfs_list_remove_request(req);
-		nfs_clear_request(req);
-		nfs_page_free(req);
-
-		p = head->next;
-		res++;
-	}
-	return res;
-}
-
 /**
  * nfs_coalesce_requests - Split coalesced requests out from a list.
  * @head: source list

include/linux/nfs_page.h

@@ -47,7 +47,6 @@ extern	struct nfs_page *nfs_create_request(struct file *, struct inode *,
 					    unsigned int, unsigned int);
 extern	void nfs_clear_request(struct nfs_page *req);
 extern	void nfs_release_request(struct nfs_page *req);
-extern	void nfs_release_list(struct list_head *list);
 
 
 extern	void nfs_list_add_request(struct nfs_page *, struct list_head *);
@@ -57,7 +56,6 @@ extern	int nfs_scan_list(struct list_head *, struct list_head *,
 extern	int nfs_coalesce_requests(struct list_head *, struct list_head *,
 				  unsigned int);
 extern  int nfs_wait_on_request(struct nfs_page *);
-extern	int nfs_wait_for_reads(struct list_head *);
 
 extern	spinlock_t nfs_wreq_lock;