linux-kernel - Re: [PATCH 12/18] kernel: add ksys

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Message-ID: <20180514120756.GA11638@infradead.org>
Date:   Mon, 14 May 2018 05:07:56 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Mark Rutland <mark.rutland@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        catalin.marinas@....com, dave.martin@....com, james.morse@....com,
        linux@...inikbrodowski.net, linux-fsdevel@...r.kernel.org,
        marc.zyngier@....com, viro@...iv.linux.org.uk, will.deacon@....com
Subject: Re: [PATCH 12/18] kernel: add ksys_personality()

On Mon, May 14, 2018 at 10:46:34AM +0100, Mark Rutland wrote:
> Using this helper allows us to avoid the in-kernel call to the
> sys_personality() syscall. The ksys_ prefix denotes that this function
> is meant as a drop-in replacement for the syscall. In particular, it
> uses the same calling convention as sys_personality().
> 
> This is necessary to enable conversion of arm64's syscall handling to
> use pt_regs wrappers.

Plese just opencode the trivial sys_personality logic instead.