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mips: add support for folded p4d page tables

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Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate, replace 5leve-fixup.h with pgtable-nop4d.h and
drop usage of __ARCH_USE_5LEVEL_HACK.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: Mike Rapoport <rppt@kernel.org>
This commit is contained in:
Mike Rapoport
2019-11-21 18:21:33 +02:00
committed by Paul Burton
parent 31168f033e
commit 2bee1b5848
14 changed files with 75 additions and 39 deletions
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arch/mips/include/asm/pgtable-32.h
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@@ -16,7 +16,6 @@
#include <asm/cachectl.h>
#include <asm/fixmap.h>
#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopmd.h>
#ifdef CONFIG_HIGHMEM