[tip:x86/mm] x86, mm: Enable ARCH_DMA_ADDR_T_64BIT with X86_64 || HIGHMEM64G

[tip-bot for FUJITA Tomonori]

Commit-ID:  66f2b061546974b96b7b238a92ce89a87ecf0754
Gitweb:     http://git.kernel.org/tip/66f2b061546974b96b7b238a92ce89a87ecf0754
Author:     FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
AuthorDate: Wed, 20 Oct 2010 15:55:35 -0700
Committer:  H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Wed, 20 Oct 2010 16:02:42 -0700

x86, mm: Enable ARCH_DMA_ADDR_T_64BIT with X86_64 || HIGHMEM64G

Set CONFIG_ARCH_DMA_ADDR_T_64BIT when we set dma_addr_t to 64 bits in
<asm/types.h>; this allows Kconfig decisions based on this property.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
LKML-Reference: <201010202255.o9KMtZXu009370@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Acked-by: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
 arch/x86/Kconfig |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index cea0cd9..2924f4e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1148,6 +1148,9 @@ config X86_PAE
 config ARCH_PHYS_ADDR_T_64BIT
 	def_bool X86_64 || X86_PAE
 
+config ARCH_DMA_ADDR_T_64BIT
+	def_bool X86_64 || HIGHMEM64G
+
 config DIRECT_GBPAGES
 	bool "Enable 1GB pages for kernel pagetables" if EMBEDDED
 	default y
--
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