linux-kernel - Re: [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL

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Message-ID: <20191217151549.GH1666@brightrain.aerifal.cx>
Date:   Tue, 17 Dec 2019 10:15:49 -0500
From:   Rich Felker <dalias@...c.org>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     linux-sh@...r.kernel.org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Mike Rapoport <rppt@...ux.ibm.com>
Subject: Re: [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK

On Tue, Dec 17, 2019 at 04:21:48PM +0200, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@...ux.ibm.com>
> 
> Hi,
> 
> These patches update the SuperH page table folding/unfolding to take into
> account the 5th level.

Is this only for 64-bit/sh5? If so, I'd really like to avoid having
patch churn that nominally keeps it working, since it doesn't; GCC
dropped support a long time ago and it was experimental to begin with,
never appeared in production. Has anyone looked lately at what it
would take to remove it?

Rich