linux-kernel - [PATCH 0/2] x86/mm: vmalloc_fault fix for CONFIG

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Message-Id: <20180313170347.3829-1-toshi.kani@hpe.com>
Date:   Tue, 13 Mar 2018 11:03:45 -0600
From:   Toshi Kani <toshi.kani@....com>
To:     tglx@...utronix.de, mingo@...hat.com, hpa@...or.com
Cc:     bp@...en8.de, luto@...nel.org, gratian.crisan@...com,
        x86@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] x86/mm: vmalloc_fault fix for CONFIG_HUGETLBFS off

Gratian Crisan reported that vmalloc_fault() crashes when
CONFIG_HUGETLBFS is not set since the function inadvertently
uses pXn_huge(), which always return 0 in this case. [1]
ioremap() does not depend on CONFIG_HUGETLBFS.

Patch 01 fixes the issue in vmalloc_fault().
Patch 02 is a clean-up for vmalloc_fault().

[1] https://lkml.org/lkml/2018/3/8/1281

---
Toshi Kani (2):
 1/2 x86/mm: fix vmalloc_fault to use pXd_large
 2/2 x86/mm: remove pointless checks in vmalloc_fault

---
 arch/x86/mm/fault.c | 62 +++++++++++++++++------------------------------------
 1 file changed, 20 insertions(+), 42 deletions(-)