switch ecryptfs_get_locked_page() to struct inode *

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index 0cc4faf..3cc17a9 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -145,7 +145,7 @@
 			if (num_bytes > total_remaining_zeros)
 				num_bytes = total_remaining_zeros;
 		}
-		ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_file,
+		ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_inode,
 							 ecryptfs_page_idx);
 		if (IS_ERR(ecryptfs_page)) {
 			rc = PTR_ERR(ecryptfs_page);
@@ -302,10 +302,10 @@
 int ecryptfs_read(char *data, loff_t offset, size_t size,
 		  struct file *ecryptfs_file)
 {
+	struct inode *ecryptfs_inode = ecryptfs_file->f_dentry->d_inode;
 	struct page *ecryptfs_page;
 	char *ecryptfs_page_virt;
-	loff_t ecryptfs_file_size =
-		i_size_read(ecryptfs_file->f_dentry->d_inode);
+	loff_t ecryptfs_file_size = i_size_read(ecryptfs_inode);
 	loff_t data_offset = 0;
 	loff_t pos;
 	int rc = 0;
@@ -327,7 +327,7 @@
 
 		if (num_bytes > total_remaining_bytes)
 			num_bytes = total_remaining_bytes;
-		ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_file,
+		ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_inode,
 							 ecryptfs_page_idx);
 		if (IS_ERR(ecryptfs_page)) {
 			rc = PTR_ERR(ecryptfs_page);