From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Date: Tue, 24 Mar 2020 10:40:01 +0000 Subject: [PATCH 0/4] Rework sparc32 page-table layout Message-Id: <20200324104005.11279-1-will@kernel.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org Cc: kernel-team@android.com, Will Deacon , "David S. Miller" , Peter Zijlstra , Nick Desaulniers , Matt Fleming , sparclinux@vger.kernel.org Hi folks, This series of patches reworks the sparc32 page-table layout so that 'pmd_t' no longer embeds an array of 16 physical pointers, which means that we can finally enforce atomicity for accesses made using READ_ONCE(): https://lkml.kernel.org/r/20200123153341.19947-1-will@kernel.org I've tested this with QEMU by booting Debian Etch. Please take a look! Cheers, Will Cc: "David S. Miller" Cc: Peter Zijlstra Cc: Nick Desaulniers Cc: Matt Fleming Cc: sparclinux@vger.kernel.org --->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(-) -- 2.20.1