netdev - Re: [PATCH v2 01/17] y2038: compat: Move common compat types to asm-generic/compat.h

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Date:   Tue, 17 Jul 2018 05:49:25 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     tglx@...utronix.de, y2038@...ts.linaro.org, hch@...radead.org,
        linux-api@...r.kernel.org, linux-arch@...r.kernel.org,
        libc-alpha@...rceware.org, albert.aribaud@...ev.fr,
        netdev@...r.kernel.org, viro@...iv.linux.org.uk,
        peterz@...radead.org, dvhart@...radead.org, ebiederm@...ssion.com,
        linux@...inikbrodowski.net
Subject: Re: [PATCH v2 01/17] y2038: compat: Move common compat types to
 asm-generic/compat.h

On Mon, Jul 16, 2018 at 06:10:47PM +0200, Arnd Bergmann wrote:
> While converting compat system call handlers to work on 32-bit
> architectures, I found a number of types used in those handlers
> that are identical between all architectures.
> 
> Let's move all the identical ones into asm-generic/compat.h to avoid
> having to add even more identical definitions of those types.
> 
> For unknown reasons, mips defines __compat_gid32_t, __compat_uid32_t
> and compat_caddr_t as signed, while all others have them unsigned.
> This seems to be a mistake, but I'm leaving it alone here. The other
> types all differ by size or alignment on at least on architecture.
> 
> compat_aio_context_t is currently defined in linux/compat.h but
> also needed for compat_sys_io_getevents(), so let's move it into
> the same place.
> 
> While we still have not decided whether the 32-bit time handling
> will always use the compat syscalls, or in which form, I think this
> is a useful cleanup that we can merge regardless.

Looks good:

Reviewed-by: Christoph Hellwig <hch@....de>