From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Date: Tue, 17 Dec 2019 15:36:52 +0000 Subject: Re: [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK Message-Id: <20191217153651.GB4094@rapoport-lnx> List-Id: References: <20191217142150.10392-1-rppt@kernel.org> <20191217151549.GH1666@brightrain.aerifal.cx> In-Reply-To: <20191217151549.GH1666@brightrain.aerifal.cx> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Rich Felker Cc: linux-sh@vger.kernel.org, Yoshinori Sato , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport , Mike Rapoport On Tue, Dec 17, 2019 at 10:15:49AM -0500, Rich Felker wrote: > On Tue, Dec 17, 2019 at 04:21:48PM +0200, Mike Rapoport wrote: > > From: Mike Rapoport > > > > 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? This is a part of a generic cleanup of page table manipulations and removal of __ARCH_USE_5LEVEL_HACK and the related code from the kernel. So this is not related to a particular sh variant. > Rich -- Sincerely yours, Mike.