From: Kees Cook <keescook@chromium.org>
Date: Fri, 14 Feb 2014 19:19:03 +0000 (+0100)
Subject: ARM: 7963/1: mm: report both sections from PMD
X-Git-Tag: upstream/snapshot3+hdmi~3319^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cd91b2fecfa66967e6ad732a9af860eb96c31ba4;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

ARM: 7963/1: mm: report both sections from PMD

On 2-level page table systems, the PMD has 2 section entries. Report
these, otherwise ARM_PTDUMP will miss reporting permission changes on
odd section boundaries.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c
index 2b3a564..ef69152 100644
--- a/arch/arm/mm/dump.c
+++ b/arch/arm/mm/dump.c
@@ -264,6 +264,9 @@ static void walk_pmd(struct pg_state *st, pud_t *pud, unsigned long start)
 			note_page(st, addr, 3, pmd_val(*pmd));
 		else
 			walk_pte(st, pmd, addr);
+
+		if (SECTION_SIZE < PMD_SIZE && pmd_large(pmd[1]))
+			note_page(st, addr + SECTION_SIZE, 3, pmd_val(pmd[1]));
 	}
 }