ceph: fix comment, remove extraneous args

The offset/length arguments aren't used.
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/file.c

@@ -376,21 +376,19 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
 	dout("sync_read on file %p %llu~%u %s\n", file, off, len,
 	     (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
 
-	if (file->f_flags & O_DIRECT) {
-		pages = ceph_get_direct_page_vector(data, num_pages, off, len);
+	if (file->f_flags & O_DIRECT)
+		pages = ceph_get_direct_page_vector(data, num_pages);
+	else
+		pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
+	if (IS_ERR(pages))
+		return PTR_ERR(pages);
 
 	/*
 	 * flush any page cache pages in this range.  this
-		 * will make concurrent normal and O_DIRECT io slow,
+	 * will make concurrent normal and sync io slow,
 	 * but it will at least behave sensibly when they are
 	 * in sequence.
 	 */
-	} else {
-		pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
-	}
-	if (IS_ERR(pages))
-		return PTR_ERR(pages);
-
 	ret = filemap_write_and_wait(inode->i_mapping);
 	if (ret < 0)
 		goto done;

include/linux/ceph/libceph.h

@@ -227,8 +227,7 @@ extern int ceph_open_session(struct ceph_client *client);
 extern void ceph_release_page_vector(struct page **pages, int num_pages);
 
 extern struct page **ceph_get_direct_page_vector(const char __user *data,
-					    int num_pages,
-					    loff_t off, size_t len);
+						 int num_pages);
 extern void ceph_put_page_vector(struct page **pages, int num_pages);
 extern void ceph_release_page_vector(struct page **pages, int num_pages);
 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);

net/ceph/pagevec.c

@@ -13,8 +13,7 @@
  * build a vector of user pages
  */
 struct page **ceph_get_direct_page_vector(const char __user *data,
-						 int num_pages,
-						 loff_t off, size_t len)
+					  int num_pages)
 {
 	struct page **pages;
 	int rc;