From: Hugh Dickins <hughd@google.com>
Date: Tue, 23 Apr 2013 10:20:35 +0000 (+0100)
Subject: ARM: 7701/1: mm: Allow arch code to control the user page table ceiling
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~51^2~1^5~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a0a9434dd50aac5971d63207ff1e25e69c9abdb3;p=pandora-kernel.git

ARM: 7701/1: mm: Allow arch code to control the user page table ceiling

On architectures where a pgd entry may be shared between user and kernel
(e.g. ARM+LPAE), freeing page tables needs a ceiling other than 0. This
patch introduces a generic USER_PGTABLES_CEILING that arch code can
override. It is the responsibility of the arch code setting the ceiling
to ensure the complete freeing of the page tables (usually in
pgd_free()).

[catalin.marinas@arm.com: commit log; shift_arg_pages(), asm-generic/pgtables.h changes]

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@vger.kernel.org> # 3.3+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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