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From: Mike Rapoport <rppt@kernel.org>
To: Rich Felker <dalias@libc.org>
Cc: linux-sh@vger.kernel.org,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Mike Rapoport <rppt@linux.ibm.com>,
	Mike Rapoport <rppt@kernel.org>
Subject: Re: [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK
Date: Tue, 17 Dec 2019 15:36:52 +0000	[thread overview]
Message-ID: <20191217153651.GB4094@rapoport-lnx> (raw)
In-Reply-To: <20191217151549.GH1666@brightrain.aerifal.cx>

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 <rppt@linux.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?

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.

WARNING: multiple messages have this Message-ID (diff)
From: Mike Rapoport <rppt@kernel.org>
To: Rich Felker <dalias@libc.org>
Cc: linux-sh@vger.kernel.org,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Mike Rapoport <rppt@linux.ibm.com>,
	Mike Rapoport <rppt@kernel.org>
Subject: Re: [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK
Date: Tue, 17 Dec 2019 17:36:52 +0200	[thread overview]
Message-ID: <20191217153651.GB4094@rapoport-lnx> (raw)
In-Reply-To: <20191217151549.GH1666@brightrain.aerifal.cx>

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 <rppt@linux.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?

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.

  reply	other threads:[~2019-12-17 15:36 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-17 14:21 [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK Mike Rapoport
2019-12-17 14:21 ` Mike Rapoport
2019-12-17 14:21 ` [PATCH 1/2] sh: drop __pXd_offset() macros that duplicate pXd_index() ones Mike Rapoport
2019-12-17 14:21   ` Mike Rapoport
2019-12-17 14:21 ` [PATCH 2/2] sh: add support for folded p4d page tables Mike Rapoport
2019-12-17 14:21   ` Mike Rapoport
2019-12-17 17:59   ` Geert Uytterhoeven
2019-12-17 17:59     ` Geert Uytterhoeven
2019-12-17 17:59     ` Geert Uytterhoeven
2019-12-17 18:32     ` Mike Rapoport
2019-12-17 18:32       ` Mike Rapoport
2019-12-17 15:15 ` [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK Rich Felker
2019-12-17 15:15   ` Rich Felker
2019-12-17 15:36   ` Mike Rapoport [this message]
2019-12-17 15:36     ` Mike Rapoport

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