Hi all, I've recently been looking at the XFS fallocate implementation and got upset about the messing parsing of the mode argument, which mixes modes and an optional flag in a really confusing way. This series tries to clean this up by better defining what is the operation mode and what is an optional flag, so that both the core code and file systems can use switch statements to switch on the mode. Changes since v1: - fix the IS_APPEND check - ensure space is allocated after unshare
