linux-kernel - Re: [tip:x86/x32] x32: Fix alignment fail in struct compat

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Message-ID: <CAMe9rOpfPQghra1PQTUwsFOvjgNpzFDEGS5=BbFBjn=HZGL93g@mail.gmail.com>
Date:	Wed, 18 Apr 2012 11:01:32 -0700
From:	"H.J. Lu" <hjl.tools@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/x32] x32: Fix alignment fail in struct compat_siginfo

On Wed, Apr 18, 2012 at 10:47 AM, H. Peter Anvin <hpa@...or.com> wrote:
> On 04/18/2012 10:38 AM, H.J. Lu wrote:
>>
>> It doesn't match struct siginfo in include/asm-generic/siginfo.h for
>> x32.
>>
>
> What is missing (from either)?
>

include/asm-generic/siginfo.h has

                /* SIGCHLD */
                struct {
                        __kernel_pid_t _pid;    /* which child */
                        __ARCH_SI_UID_T _uid;   /* sender's uid */
                        int _status;            /* exit code */
                        __kernel_clock_t _utime;
                        __kernel_clock_t _stime;
                } _sigchld;


Although x32 __kernel_clock_t is s64 with 64bit alignment, in
_sigchld, it must be compat_s64 with 32bit alignment.

-- 
H.J.
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