linux-kernel - Re: [PATCH 0/1] mm/hugetlb: add more arch-defined huge_pte

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Date:	Wed, 13 Mar 2013 04:00:12 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Gerald Schaefer <gerald.schaefer@...ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, Hugh Dickins <hughd@...gle.com>,
	Hillf Danton <dhillf@...il.com>, Michal Hocko <mhocko@...e.cz>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Chris Metcalf <cmetcalf@...era.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-mm@...ck.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [PATCH 0/1] mm/hugetlb: add more arch-defined huge_pte_xxx
 functions

On Tue, Mar 12, 2013 at 07:48:25PM +0100, Gerald Schaefer wrote:
> This patch introduces those huge_pte_xxx functions and their
> implementation on all architectures supporting hugetlbfs. This change
> will be a no-op for all architectures other than s390.
> 
..

>  arch/ia64/include/asm/hugetlb.h    | 36 ++++++++++++++++++++++++
>  arch/mips/include/asm/hugetlb.h    | 36 ++++++++++++++++++++++++
>  arch/powerpc/include/asm/hugetlb.h | 36 ++++++++++++++++++++++++
>  arch/s390/include/asm/hugetlb.h    | 56 +++++++++++++++++++++++++++++++++++++-
>  arch/s390/include/asm/pgtable.h    | 20 --------------
>  arch/s390/mm/hugetlbpage.c         |  2 +-
>  arch/sh/include/asm/hugetlb.h      | 36 ++++++++++++++++++++++++
>  arch/sparc/include/asm/hugetlb.h   | 36 ++++++++++++++++++++++++
>  arch/tile/include/asm/hugetlb.h    | 36 ++++++++++++++++++++++++
>  arch/x86/include/asm/hugetlb.h     | 36 ++++++++++++++++++++++++
>  mm/hugetlb.c                       | 23 ++++++++--------
>  11 files changed, 320 insertions(+), 33 deletions(-)
> 
None of these wrappers are doing anything profound for most platforms, so
this would be a good candidate for an asm-generic/hugetlb.h (after which
s390 can continue to be special and no one else has to care).
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