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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2015-02-12 02:26:47 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 04:06:04 +0300
commit8aa76875dc15b2dd21fa74eb7c12dc3c75f4b6b6 (patch)
treef7a106df217482745d338eeaa7033b7dcb7646af
parent4155b8e0a79570d41ae77b5bf7df375bd4c36610 (diff)
downloadlinux-8aa76875dc15b2dd21fa74eb7c12dc3c75f4b6b6.tar.xz
arm: define __PAGETABLE_PMD_FOLDED for !LPAE
ARM uses custom implementation of PMD folding in 2-level page table case. Generic code expects to see __PAGETABLE_PMD_FOLDED to be defined if PMD is folded, but ARM doesn't do this. Let's fix it. Defining __PAGETABLE_PMD_FOLDED will drop out unused __pmd_alloc(). It also fixes problems with recently-introduced pmd accounting on ARM without LPAE. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Nishanth Menon <nm@ti.com> Reported-by: Simon Horman <horms@verge.net.au> Tested-by: Simon Horman <horms+renesas@verge.net.au> Tested-by: Fabio Estevam <festevam@gmail.com> Tested-by: Felipe Balbi <balbi@ti.com> Tested-by: Nishanth Menon <nm@ti.com> Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: David Rientjes <rientjes@google.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/arm/include/asm/pgtable-2level.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/pgtable-2level.h b/arch/arm/include/asm/pgtable-2level.h
index bcc5e300413f..bfd662e49a25 100644
--- a/arch/arm/include/asm/pgtable-2level.h
+++ b/arch/arm/include/asm/pgtable-2level.h
@@ -10,6 +10,8 @@
#ifndef _ASM_PGTABLE_2LEVEL_H
#define _ASM_PGTABLE_2LEVEL_H
+#define __PAGETABLE_PMD_FOLDED
+
/*
* Hardware-wise, we have a two level page table structure, where the first
* level has 4096 entries, and the second level has 256 entries. Each entry