From: Jungseok Lee <jungseoklee85@gmail.com>
Date: Sat, 20 Dec 2014 00:49:40 +0000 (+0000)
Subject: arm64: mm: Add pgd_page to support RCU fast_gup
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~359^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5d96e0cba26323c3daeb9f7cdfd4efe70985e2c6;p=pandora-kernel.git

arm64: mm: Add pgd_page to support RCU fast_gup

This patch adds pgd_page definition in order to keep supporting
HAVE_GENERIC_RCU_GUP configuration. In addition, it changes pud_page
expression to align with pmd_page for readability.

An introduction of pgd_page resolves the following build breakage
under 4KB + 4Level memory management combo.

mm/gup.c: In function 'gup_huge_pgd':
mm/gup.c:889:2: error: implicit declaration of function 'pgd_page' [-Werror=implicit-function-declaration]
  head = pgd_page(orig);
  ^
mm/gup.c:889:7: warning: assignment makes pointer from integer without a cast
  head = pgd_page(orig);

Cc: Will Deacon <will.deacon@arm.com>
Cc: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Jungseok Lee <jungseoklee85@gmail.com>
[catalin.marinas@arm.com: remove duplicate pmd_page definition]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

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