[PATCH 1/4] btrfs: inode: use min() to replace open-code in btrfs_invalidatepage()

[Qu Wenruo <wqu@suse.com>]

In btrfs_invalidatepage() we introduce a temporary variable, new_len, to
update ordered->truncated_len.

But we can use min() to replace it completely and no need for the
variable.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/inode.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index af3439b21bc4..dced71bccaac 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8219,15 +8219,13 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
 		 */
 		if (TestClearPagePrivate2(page)) {
 			struct btrfs_ordered_inode_tree *tree;
-			u64 new_len;
 
 			tree = &inode->ordered_tree;
 
 			spin_lock_irq(&tree->lock);
 			set_bit(BTRFS_ORDERED_TRUNCATED, &ordered->flags);
-			new_len = start - ordered->file_offset;
-			if (new_len < ordered->truncated_len)
-				ordered->truncated_len = new_len;
+			ordered->truncated_len = min(ordered->truncated_len,
+					start - ordered->file_offset);
 			spin_unlock_irq(&tree->lock);
 
 			ASSERT(end - start + 1 < U32_MAX);
-- 
2.29.2