Re: [PATCH] io_uring/sync: check unused sqe fields for fallocate

[Christoph Hellwig]

On Fri, Jul 17, 2026 at 10:13:12AM +0800, Yi Xie wrote:
> Zero check unused SQE fields addr3 and pad2 for fallocate. They're
> not needed now, but could be used sometime in the future.

This is the right thing to do for a newly added command.  But
d63d1b5edb7b8 has been around more than 6 years, it's too late now
as old kernels won't have this check, so you can't ever use it for
new features.