On Sat, Jun 27, 2020 at 02:45:14AM +0530, Kanchan Joshi wrote:

For block IO path (which is the scope of this patchset) there is no
probelm in using RWF_APPEND for zone-append, because it does not do
anything for block device. We can use that, avoiding introduction of
RWF_ZONE_APPEND in user-space.

No, you are not just touching the block I/O path.  This is all over the
general file code, and all RWF_* flag are about file I/O.