From: Goldwyn Rodrigues <rgoldwyn@suse.com>
Date: Wed, 14 Oct 2020 14:55:44 +0000 (-0500)
Subject: btrfs: use round_down while calculating start position in btrfs_dirty_pages()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=13f0dd8f786152404fa5bc1f9436aad83556a311;p=linux.git

btrfs: use round_down while calculating start position in btrfs_dirty_pages()

round_down looks prettier than the bit mask operations.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 7c5e3d4065741..c7ed30edf1cd4 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -474,7 +474,7 @@ int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
 	loff_t isize = i_size_read(&inode->vfs_inode);
 	unsigned int extra_bits = 0;
 
-	start_pos = pos & ~((u64) fs_info->sectorsize - 1);
+	start_pos = round_down(pos, fs_info->sectorsize);
 	num_bytes = round_up(write_bytes + pos - start_pos,
 			     fs_info->sectorsize);