On Tue, Sep 18, 2012 at 05:52:23PM +0800, Liu Bo wrote:

Btrfs uses inclusive range end for lock_extent(), unlock_extent() and
related functions, so we made off-by-one errors in file clone.

We're lucky that it's off-by-one in a way that it locks more than it
should. The function is full of such calculations, I didn't spot any
other instances, but another review round would not harm.

Reviewed-by: David Sterba <redacted>