Suparna Bhattacharya writes:

quoted

This looks like it will have the same problem on s390 as
sys_sync_file_range.  Maybe the prototype should be:

asmlinkage long sys_fallocate(loff_t offset, loff_t len, int fd, int mode)

Yes, but the trouble is that there was a contrary viewpoint preferring that fd
first be maintained as a convention like other syscalls (see the following
posts)

Of course the interface used by an application program would have the
fd first.  Glibc can do the translation.

Paul.