From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f70.google.com (mail-pg0-f70.google.com [74.125.83.70]) by kanga.kvack.org (Postfix) with ESMTP id 91CBE6B02CF for ; Tue, 15 May 2018 17:40:47 -0400 (EDT) Received: by mail-pg0-f70.google.com with SMTP id f5-v6so676231pgq.19 for ; Tue, 15 May 2018 14:40:47 -0700 (PDT) Received: from g2t2353.austin.hpe.com (g2t2353.austin.hpe.com. [15.233.44.26]) by mx.google.com with ESMTPS id m13-v6si805229pgt.624.2018.05.15.14.40.45 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 15 May 2018 14:40:46 -0700 (PDT) From: Toshi Kani Subject: [PATCH v2 0/3] fix free pmd/pte page handlings on x86 Date: Tue, 15 May 2018 15:39:28 -0600 Message-Id: <20180515213931.23885-1-toshi.kani@hpe.com> Sender: owner-linux-mm@kvack.org List-ID: To: mhocko@suse.com, akpm@linux-foundation.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com Cc: cpandya@codeaurora.org, linux-mm@kvack.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org This series fixes two issues in the x86 ioremap free page handlings for pud/pmd mappings. Patch 01 fixes BUG_ON on x86-PAE reported by Joerg. It disables the free page handling on x86-PAE. Patch 02-03 fixes a possible issue with speculation which can cause stale page-directory cache. - Patch 02 is from Chintan's v9 01/04 patch [1], which adds a new arg 'addr'. This avoids merge conflicts with his series. - Patch 03 adds a TLB purge (INVLPG) to purge page-structure caches that may be cached by speculation. See the patch descriptions for more detal. [1] https://patchwork.kernel.org/patch/10371015/ v2: - Reordered patch-set, so that patch 01 can be applied independently. - Added a NULL pointer check for the page alloc in patch 03. --- Toshi Kani (2): 1/3 x86/mm: disable ioremap free page handling on x86-PAE 3/3 x86/mm: add TLB purge to free pmd/pte page interfaces Chintan Pandya (1): 2/3 ioremap: Update pgtable free interfaces with addr --- arch/arm64/mm/mmu.c | 4 +-- arch/x86/mm/pgtable.c | 59 +++++++++++++++++++++++++++++++++++++------ include/asm-generic/pgtable.h | 8 +++--- lib/ioremap.c | 4 +-- 4 files changed, 59 insertions(+), 16 deletions(-)