linux-kernel - Re: [Y2038] [PATCH 08/23] y2038: ipc: remove __kernel_time

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Date:   Wed, 20 Nov 2019 22:49:19 +0000
From:   Ben Hutchings <ben.hutchings@...ethink.co.uk>
To:     Arnd Bergmann <arnd@...db.de>, y2038@...ts.linaro.org,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Helge Deller <deller@....de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "David S. Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org
Cc:     linux-arch@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        "H. Peter Anvin" <hpa@...or.com>, sparclinux@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [Y2038] [PATCH 08/23] y2038: ipc: remove __kernel_time_t
 reference from headers

On Fri, 2019-11-08 at 22:07 +0100, Arnd Bergmann wrote:
[...]
> --- a/arch/x86/include/uapi/asm/sembuf.h
> +++ b/arch/x86/include/uapi/asm/sembuf.h
> @@ -21,9 +21,9 @@ struct semid64_ds {
>  	unsigned long	sem_ctime;	/* last change time */
>  	unsigned long	sem_ctime_high;
>  #else
> -	__kernel_time_t	sem_otime;	/* last semop time */
> +	long		sem_otime;	/* last semop time */
>  	__kernel_ulong_t __unused1;
> -	__kernel_time_t	sem_ctime;	/* last change time */
> +	long		sem_ctime;	/* last change time */
>  	__kernel_ulong_t __unused2;
>  #endif
>  	__kernel_ulong_t sem_nsems;	/* no. of semaphores in array */
[...]

We need to use __kernel_long_t here to do the right thing on x32.

Ben.

-- 
Ben Hutchings, Software Developer                         Codethink Ltd
https://www.codethink.co.uk/                 Dale House, 35 Dale Street
                                     Manchester, M1 2HF, United Kingdom