Re: [PATCH v9 3/3] mm/madvise: introduce process_madvise() syscall: an external memory hinting API

[Florian Weimer]

* Minchan Kim:

> On Tue, Sep 01, 2020 at 08:46:02PM +0200, Florian Weimer wrote:
>> * Minchan Kim:
>> 
>> >       ssize_t process_madvise(int pidfd, const struct iovec *iovec,
>> >                 unsigned long vlen, int advice, unsigned int flags);
>> 
>> size_t for vlen provides a clearer hint regarding the type of special
>> treatment needed for ILP32 here (zero extension, not changing the type
>> to long long).
>> 
>
> All existing system calls using iove in Linux uses unsigned long so
> I want to be consistent with them unless process_madvise need something
> speicial.

Userspace uses int, following POSIX (where applicable).  There is no
consistency to be had here.