From e0a45e3580a033669b24b04c3535515d69bb9702 Mon Sep 17 00:00:00 2001 From: "David S. Miller" <davem@davemloft.net> Date: Wed, 18 Sep 2013 14:22:34 -0700 Subject: [PATCH] sparc64: Define PAGE_OFFSET in terms of physical address bits. This makes clearer the implications for a given choosen value. Based upon patches by Bob Picco. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Bob Picco <bob.picco@oracle.com> --- arch/sparc/include/asm/page_64.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index d95931247feb2..9dd0f7360822f 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -117,7 +117,9 @@ typedef pte_t *pgtable_t; /* We used to stick this into a hard-coded global register (%g4) * but that does not make sense anymore. */ -#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL) +#define MAX_SUPPORTED_PA_BITS 43 +#define PAGE_OFFSET_BY_BITS(X) (-(_AC(1,UL) << (X))) +#define PAGE_OFFSET PAGE_OFFSET_BY_BITS(MAX_SUPPORTED_PA_BITS) #ifndef __ASSEMBLY__ -- 2.30.2