linux-kernel - [PATCHv3 13/17] tile: expose number of page table levels

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Message-Id: <1424950520-90188-14-git-send-email-kirill.shutemov@linux.intel.com>
Date:	Thu, 26 Feb 2015 13:35:16 +0200
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Chris Metcalf <cmetcalf@...hip.com>
Subject: [PATCHv3 13/17] tile: expose number of page table levels

We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Chris Metcalf <cmetcalf@...hip.com>
Tested-by: Guenter Roeck <linux@...ck-us.net>
---
 arch/tile/Kconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 7cca41842a9e..0142d578b5a8 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -147,6 +147,11 @@ config ARCH_DEFCONFIG
 	default "arch/tile/configs/tilepro_defconfig" if !TILEGX
 	default "arch/tile/configs/tilegx_defconfig" if TILEGX
 
+config PGTABLE_LEVELS
+	int
+	default 3 if 64BIT
+	default 2
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
-- 
2.1.4

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