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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-12-01 10:16:22 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-12-01 10:16:22 +0300 |
| commit | 838632438145ac6863377eb12d8b8eef9c55d288 (patch) | |
| tree | fbb0757df837f3c75a99c518a3596c38daef162d /arch/mips/include/asm/pgtable.h | |
| parent | 9996508b3353063f2d6c48c1a28a84543d72d70b (diff) | |
| parent | 29e553631b2a0d4eebd23db630572e1027a9967a (diff) | |
| download | linux-838632438145ac6863377eb12d8b8eef9c55d288.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/mips/include/asm/pgtable.h')
| -rw-r--r-- | arch/mips/include/asm/pgtable.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index 1a9f9b257551..d6eb6134abec 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -76,6 +76,16 @@ extern unsigned long zero_page_mask; #define ZERO_PAGE(vaddr) \ (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) +#define is_zero_pfn is_zero_pfn +static inline int is_zero_pfn(unsigned long pfn) +{ + extern unsigned long zero_pfn; + unsigned long offset_from_zero_pfn = pfn - zero_pfn; + return offset_from_zero_pfn <= (zero_page_mask >> PAGE_SHIFT); +} + +#define my_zero_pfn(addr) page_to_pfn(ZERO_PAGE(addr)) + extern void paging_init(void); /* |