linux-kernel - Re: [PATCH V4 06/17] riscv: compat: Add basic compat date type implementation

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Date:   Sun, 30 Jan 2022 13:47:16 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Anup Patel <anup@...infault.org>,
        gregkh <gregkh@...uxfoundation.org>,
        liush <liush@...winnertech.com>, Wei Fu <wefu@...hat.com>,
        Drew Fustini <drew@...gleboard.org>,
        Wang Junqiang <wangjunqiang@...as.ac.cn>,
        Christoph Hellwig <hch@....de>,
        Christoph Hellwig <hch@...radead.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        linux-csky@...r.kernel.org,
        linux-s390 <linux-s390@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Parisc List <linux-parisc@...r.kernel.org>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH V4 06/17] riscv: compat: Add basic compat date type implementation

On Sun, Jan 30, 2022 at 5:56 AM Arnd Bergmann <arnd@...db.de> wrote:
>
> On Sat, Jan 29, 2022 at 1:17 PM <guoren@...nel.org> wrote:
> > +
> > +#define COMPAT_RLIM_INFINITY   0x7fffffff
> >
> > +#define F_GETLK64      12
> > +#define F_SETLK64      13
> > +#define F_SETLKW64     14
>
> These now come from the generic definitions I think. The flock definitions
> are just the normal ones,
Yes, it could be removed after Christoph Hellwig's patch merged.

> and AFAICT the RLIM_INIFINITY definition here
> is actually wrong and should be the default 0xffffffffu to match the
> native (~0UL) definition.
Yes, native rv32 used ~0UL, although its task_size is only 2.4GB.

I would remove #define COMPAT_RLIM_INFINITY   0x7fffffff

>
>             Arnd



-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/