btrfs: Use explicit round_down macro in btrfs resize ioctl handler

No functional changes, just make the code more self-explanatory.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 335e252..3e744dd 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1569,8 +1569,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
                goto out_free;
        }
 
-       new_size = div_u64(new_size, fs_info->sectorsize);
-       new_size *= fs_info->sectorsize;
+       new_size = round_down(new_size, fs_info->sectorsize);
 
        btrfs_info_in_rcu(fs_info, "new size for %s is %llu",
                          rcu_str_deref(device->name), new_size);