btrfs: remove the wait argument to btrfs_start_ordered_extent

Given that wait is always set to 1, so remove the argument.
Last use of wait with 0 was in 0c304304 ("Btrfs: remove
csum_bytes_left").
Reviewed-by: NJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/defrag.c

@@ -765,7 +765,7 @@ static struct page *defrag_prepare_one_page(struct btrfs_inode *inode, pgoff_t i
 			break;
 
 		unlock_page(page);
-		btrfs_start_ordered_extent(ordered, 1);
+		btrfs_start_ordered_extent(ordered);
 		btrfs_put_ordered_extent(ordered);
 		lock_page(page);
 		/*

fs/btrfs/file.c

@@ -1017,7 +1017,7 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages,
 				unlock_page(pages[i]);
 				put_page(pages[i]);
 			}
-			btrfs_start_ordered_extent(ordered, 1);
+			btrfs_start_ordered_extent(ordered);
 			btrfs_put_ordered_extent(ordered);
 			return -EAGAIN;
 		}

fs/btrfs/inode.c

@@ -2969,7 +2969,7 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work)
 		unlock_extent(&inode->io_tree, page_start, page_end,
 			      &cached_state);
 		unlock_page(page);
-		btrfs_start_ordered_extent(ordered, 1);
+		btrfs_start_ordered_extent(ordered);
 		btrfs_put_ordered_extent(ordered);
 		goto again;
 	}
@@ -4987,7 +4987,7 @@ int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
 		unlock_extent(io_tree, block_start, block_end, &cached_state);
 		unlock_page(page);
 		put_page(page);
-		btrfs_start_ordered_extent(ordered, 1);
+		btrfs_start_ordered_extent(ordered);
 		btrfs_put_ordered_extent(ordered);
 		goto again;
 	}
@@ -7392,7 +7392,7 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
 			 */
 			if (writing ||
 			    test_bit(BTRFS_ORDERED_DIRECT, &ordered->flags))
-				btrfs_start_ordered_extent(ordered, 1);
+				btrfs_start_ordered_extent(ordered);
 			else
 				ret = nowait ? -EAGAIN : -ENOTBLK;
 			btrfs_put_ordered_extent(ordered);
@@ -8552,7 +8552,7 @@ vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf)
 		unlock_extent(io_tree, page_start, page_end, &cached_state);
 		unlock_page(page);
 		up_read(&BTRFS_I(inode)->i_mmap_lock);
-		btrfs_start_ordered_extent(ordered, 1);
+		btrfs_start_ordered_extent(ordered);
 		btrfs_put_ordered_extent(ordered);
 		goto again;
 	}

fs/btrfs/ordered-data.c

@@ -616,7 +616,7 @@ static void btrfs_run_ordered_extent_work(struct btrfs_work *work)
 	struct btrfs_ordered_extent *ordered;
 
 	ordered = container_of(work, struct btrfs_ordered_extent, flush_work);
-	btrfs_start_ordered_extent(ordered, 1);
+	btrfs_start_ordered_extent(ordered);
 	complete(&ordered->completion);
 }
 
@@ -716,13 +716,12 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
 }
 
 /*
- * Used to start IO or wait for a given ordered extent to finish.
+ * Start IO and wait for a given ordered extent to finish.
  *
- * If wait is one, this effectively waits on page writeback for all the pages
- * in the extent, and it waits on the io completion code to insert
- * metadata into the btree corresponding to the extent
+ * Wait on page writeback for all the pages in the extent and the IO completion
+ * code to insert metadata into the btree corresponding to the extent.
  */
-void btrfs_start_ordered_extent(struct btrfs_ordered_extent *entry, int wait)
+void btrfs_start_ordered_extent(struct btrfs_ordered_extent *entry)
 {
 	u64 start = entry->file_offset;
 	u64 end = start + entry->num_bytes - 1;
@@ -744,12 +743,10 @@ void btrfs_start_ordered_extent(struct btrfs_ordered_extent *entry, int wait)
 	 */
 	if (!test_bit(BTRFS_ORDERED_DIRECT, &entry->flags))
 		filemap_fdatawrite_range(inode->vfs_inode.i_mapping, start, end);
-	if (wait) {
-		if (!freespace_inode)
-			btrfs_might_wait_for_event(inode->root->fs_info, btrfs_ordered_extent);
-		wait_event(entry->wait, test_bit(BTRFS_ORDERED_COMPLETE,
-						 &entry->flags));
-	}
+
+	if (!freespace_inode)
+		btrfs_might_wait_for_event(inode->root->fs_info, btrfs_ordered_extent);
+	wait_event(entry->wait, test_bit(BTRFS_ORDERED_COMPLETE, &entry->flags));
 }
 
 /*
@@ -800,7 +797,7 @@ int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
 			btrfs_put_ordered_extent(ordered);
 			break;
 		}
-		btrfs_start_ordered_extent(ordered, 1);
+		btrfs_start_ordered_extent(ordered);
 		end = ordered->file_offset;
 		/*
 		 * If the ordered extent had an error save the error but don't
@@ -1061,7 +1058,7 @@ void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start,
 			break;
 		}
 		unlock_extent(&inode->io_tree, start, end, cachedp);
-		btrfs_start_ordered_extent(ordered, 1);
+		btrfs_start_ordered_extent(ordered);
 		btrfs_put_ordered_extent(ordered);
 	}
 }

fs/btrfs/ordered-data.h

@@ -187,7 +187,7 @@ void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
 			   struct btrfs_ordered_sum *sum);
 struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct btrfs_inode *inode,
 							 u64 file_offset);
-void btrfs_start_ordered_extent(struct btrfs_ordered_extent *entry, int wait);
+void btrfs_start_ordered_extent(struct btrfs_ordered_extent *entry);
 int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
 struct btrfs_ordered_extent *
 btrfs_lookup_first_ordered_extent(struct btrfs_inode *inode, u64 file_offset);