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| author | David S. Miller <davem@davemloft.net> | 2013-09-18 23:22:34 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-11-13 00:22:33 +0100 |
| commit | e0a45e3580a033669b24b04c3535515d69bb9702 (patch) | |
| tree | ab6910d1bc0fc84ad9eafdb65d2ed39918485f51 /arch/sparc | |
| parent | sparc64: Use PAGE_OFFSET instead of a magic constant. (diff) | |
| download | linux-e0a45e3580a033669b24b04c3535515d69bb9702.tar.xz linux-e0a45e3580a033669b24b04c3535515d69bb9702.zip | |
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>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/include/asm/page_64.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index d95931247feb..9dd0f7360822 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__ |