From: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Date: Tue, 14 Apr 2015 22:46:05 +0000 (-0700)
Subject: sparc: expose number of page table levels
X-Git-Tag: firefly_0821_release~176^2~1984^2~49
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=81a2936c1a98dd007c510dc523c5bbdce263878b;p=firefly-linux-kernel-4.4.55.git

sparc: 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@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index efb00ec75805..e49502acbab4 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -146,6 +146,10 @@ config GENERIC_ISA_DMA
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	def_bool y if SPARC64
 
+config PGTABLE_LEVELS
+	default 4 if 64BIT
+	default 3
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"