linux-kernel - Re: Linux 3.0.70

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Date:	Wed, 20 Mar 2013 16:38:21 -0600
From:	Shuah Khan <shuahkhan@...il.com>
To:	Andrew Collins <bsderandrew@...il.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: Re: Linux 3.0.70

On Wed, Mar 20, 2013 at 4:04 PM, Andrew Collins <bsderandrew@...il.com> wrote:
> Kees Cook (1):
>       signal: always clear sa_restorer on execve
>
> This commit seems to cause the following build breakage on MIPS in 3.0.70:
>
> kernel/signal.c: In function 'flush_signal_handlers':
> kernel/signal.c:441:9: error: 'struct sigaction' has no member named
> 'sa_restorer'
> make[3]: *** [kernel/signal.o] Error 1
> make[2]: *** [kernel] Error 2
> make[2]: *** Waiting for unfinished jobs....
>
> I'm testing with a variety of additional patches applied and it's a
> bit difficult to test vanilla, but this looks unrelated to my local
> patches.  Looks like MIPS defines SA_RESTORER but doesn't have a
> sa_restorer in sigaction so:
>
> --- a/kernel/signal.c
> +++ b/kernel/signal.c
> @@ -437,6 +437,9 @@ flush_signal_handlers(struct task_struct *t, int
> force_default)
>                 if (force_default || ka->sa.sa_handler != SIG_IGN)
>                         ka->sa.sa_handler = SIG_DFL;
>                 ka->sa.sa_flags = 0;
> +#ifdef SA_RESTORER
> +               ka->sa.sa_restorer = NULL;
> +#endif
>                 sigemptyset(&ka->sa.sa_mask);
>                 ka++;
>         }
>
> goes kaboom.
>

Greg,

I confirmed both mips and mipsel cross-compiles fail on all three
releases with this commit. I was focused on chasing the suspend/resume
problem and missed this failure in my cross-compile testing. :(

-- Shuah
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