From: Catalin Marinas <catalin.marinas@arm.com>
Date: Mon, 18 Feb 2013 16:51:20 +0000 (+0100)
Subject: ARM: 7654/1: Preserve L_PTE_VALID in pte_modify()
X-Git-Tag: v3.9-rc1~8^2^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=69dde4c52dbac2891b49ff9723d9c84efc5baf6f;p=pandora-kernel.git

ARM: 7654/1: Preserve L_PTE_VALID in pte_modify()

Following commit 26ffd0d4 (ARM: mm: introduce present, faulting entries
for PAGE_NONE), if a page has been mapped as PROT_NONE, the L_PTE_VALID
bit is cleared by the set_pte_ext() code. With LPAE the software and
hardware pte share the same location and subsequent modifications of pte
range (change_protection()) will leave the L_PTE_VALID bit cleared.

This patch adds the L_PTE_VALID bit to the newprot mask in pte_modify().

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Subash Patel <subash.rp@samsung.com>
Tested-by: Subash Patel <subash.rp@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org> # 3.8.x
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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