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From:   Zong Li <zongbox@gmail.com>
Date:   Thu, 21 Jun 2018 23:19:21 +0800
Message-ID: <CA+ZOyagG+wV0vCZ1S4+C+k+iw1dm=ntupsb=tz7eQ5j82qqihQ@mail.gmail.com>
Subject: Re: [PATCH 4/5] RISC-V: Change variable type for 32-bit compatible
To:     hch@infradead.org
Cc:     Zong Li <zong@andestech.com>, linux-riscv@lists.infradead.org,
        Palmer Dabbelt <palmer@sifive.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        aou@eecs.berkeley.edu, greentime@adnestech.com
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> > > -     s64 offset = (void *)v - (void *)location;
> > > +     uintptr_t offset = (void *)v - (void *)location;
> >
> > s64 is signed, uintptr is not, so this might change behavior and needs
> > an explanation.
> >
>
> Yes, it should be intptr_t. Thanks!

Correct, it should be ptrdiff_t. In kernel, there is no intptr_t definition.