linux-kernel - Re: [PATCH 2/2] riscv/include/uapi: Define a custom _

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Message-ID: <CAK8P3a37GLzp+w6m0SEV+9j_6sH91SuStyAEW-VzuJ5_dUCnZw@mail.gmail.com>
Date:   Wed, 3 Jul 2019 10:40:45 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Alistair Francis <alistair.francis@....com>
Cc:     linux-riscv-bounces@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alistair Francis <alistair23@...il.com>
Subject: Re: [PATCH 2/2] riscv/include/uapi: Define a custom __SIGINFO struct
 for RV32

On Wed, Jul 3, 2019 at 2:21 AM Alistair Francis
<alistair.francis@....com> wrote:
>
> The glibc implementation of siginfo_t results in an allignment of 8 bytes
> for the union _sifields on RV32. The kernel has an allignment of 4 bytes
> for the _sifields union. This results in information being lost when
> glibc parses the siginfo_t struct.

I think the problem is that you incorrectly defined clock_t to 64-bit,
while it is 32 bit in the kernel. You should fix the clock_t definition
instead, it would otherwise cause additional problems.

        Arnd