linux-kernel - Re: [PATCH 07/11] signal/arm64: Document conflicts with SI

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Message-ID: <20180117173944.GK22781@e103592.cambridge.arm.com>
Date:   Wed, 17 Jan 2018 17:39:44 +0000
From:   Dave Martin <Dave.Martin@....com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linux-arch@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Nicolas Pitre <nico@...aro.org>,
        Tony Lindgren <tony@...mide.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Tyler Baicar <tbaicar@...eaurora.org>,
        Will Deacon <will.deacon@....com>,
        linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
        James Morse <james.morse@....com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Olof Johansson <olof@...om.net>,
        Santosh Shilimkar <santosh.shilimkar@...com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 07/11] signal/arm64: Document conflicts with SI_USER and
 SIGFPE, SIGTRAP, SIGBUS

On Wed, Jan 17, 2018 at 11:24:06AM -0600, Eric W. Biederman wrote:
> Dave Martin <Dave.Martin@....com> writes:

[...]

> > Should si_code simply be ignored for the SIGKILL case?
> 
> I know what x86 does in a similar case is it uses force_sig instead of
> force_sig_info.  Then the generic code gets to worry about 
> 
> If the appropriate paths generic paths get to worry about what siginfo
> to fill in in that case.  Which for SI_KERNEL is zero for everything
> except the si_code and the si_signo.
> 
> That seems perfectly reasonable.

OK, I'll go with SI_KERNEL then.

Cheers
---Dave