linux-kernel - [RESEND PATCH 0/4] Rework sparc32 page-table layout

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Message-Id: <20200414214011.2699-1-will@kernel.org>
Date:   Tue, 14 Apr 2020 22:40:07 +0100
From:   Will Deacon <will@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Will Deacon <will@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        sparclinux@...r.kernel.org, kernel-team@...roid.com
Subject: [RESEND PATCH 0/4] Rework sparc32 page-table layout

Hi all,

This is a reposting of the patch series I sent previously to rework the
sparc32 page-table layout so that 'pmd_t' can be used safely with
READ_ONCE():

https://lore.kernel.org/lkml/20200324104005.11279-1-will@kernel.org

This is blocking the READ_ONCE() rework, which in turn allows us to
bump the minimum GCC version for building the kernel up to 4.8.

Cheers,

Will

Cc: "David S. Miller" <davem@...emloft.net>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Nick Desaulniers <ndesaulniers@...gle.com>
Cc: Matt Fleming <matt@...eblueprint.co.uk>
Cc: sparclinux@...r.kernel.org
Cc: kernel-team@...roid.com

--->8

Will Deacon (4):
  sparc32: mm: Fix argument checking in __srmmu_get_nocache()
  sparc32: mm: Restructure sparc32 MMU page-table layout
  sparc32: mm: Change pgtable_t type to pte_t * instead of struct page *
  sparc32: mm: Reduce allocation size for PMD and PTE tables

 arch/sparc/include/asm/page_32.h    | 12 ++--
 arch/sparc/include/asm/pgalloc_32.h | 11 ++--
 arch/sparc/include/asm/pgtable_32.h | 40 +++++++-----
 arch/sparc/include/asm/pgtsrmmu.h   | 36 +----------
 arch/sparc/include/asm/viking.h     |  5 +-
 arch/sparc/kernel/head_32.S         |  8 +--
 arch/sparc/mm/hypersparc.S          |  3 +-
 arch/sparc/mm/srmmu.c               | 95 ++++++++++-------------------
 arch/sparc/mm/viking.S              |  5 +-
 9 files changed, 85 insertions(+), 130 deletions(-)

-- 
2.26.0.110.g2183baf09c-goog