diff options
Diffstat (limited to 'arch/x86_64/mm/pageattr.c')
| -rw-r--r-- | arch/x86_64/mm/pageattr.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c index bf4aa8dd4254..d653d0bf3df6 100644 --- a/arch/x86_64/mm/pageattr.c +++ b/arch/x86_64/mm/pageattr.c @@ -51,6 +51,7 @@ static struct page *split_large_page(unsigned long address, pgprot_t prot, SetPagePrivate(base); page_private(base) = 0; + address = __pa(address); addr = address & LARGE_PAGE_MASK; pbase = (pte_t *)page_address(base); for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) { @@ -100,12 +101,13 @@ static inline void save_page(struct page *fpage) * No more special protections in this 2/4MB area - revert to a * large page again. */ -static void revert_page(unsigned long address, unsigned long pfn, pgprot_t ref_prot) +static void revert_page(unsigned long address, pgprot_t ref_prot) { pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t large_pte; + unsigned long pfn; pgd = pgd_offset_k(address); BUG_ON(pgd_none(*pgd)); @@ -113,6 +115,7 @@ static void revert_page(unsigned long address, unsigned long pfn, pgprot_t ref_p BUG_ON(pud_none(*pud)); pmd = pmd_offset(pud, address); BUG_ON(pmd_val(*pmd) & _PAGE_PSE); + pfn = (__pa(address) & LARGE_PAGE_MASK) >> PAGE_SHIFT; large_pte = pfn_pte(pfn, ref_prot); large_pte = pte_mkhuge(large_pte); set_pte((pte_t *)pmd, large_pte); @@ -138,8 +141,7 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, */ struct page *split; ref_prot2 = pte_pgprot(pte_clrhuge(*kpte)); - split = split_large_page(pfn << PAGE_SHIFT, prot, - ref_prot2); + split = split_large_page(address, prot, ref_prot2); if (!split) return -ENOMEM; set_pte(kpte, mk_pte(split, ref_prot2)); @@ -158,7 +160,7 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, if (page_private(kpte_page) == 0) { save_page(kpte_page); - revert_page(address, pfn, ref_prot); + revert_page(address, ref_prot); } return 0; } @@ -178,7 +180,6 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, */ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot) { - unsigned long phys_base_pfn = __pa_symbol(__START_KERNEL_map) >> PAGE_SHIFT; int err = 0, kernel_map = 0; int i; @@ -199,11 +200,10 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot) } /* Handle kernel mapping too which aliases part of the * lowmem */ - if ((pfn >= phys_base_pfn) && - ((pfn - phys_base_pfn) < (KERNEL_TEXT_SIZE >> PAGE_SHIFT))) { + if (__pa(address) < KERNEL_TEXT_SIZE) { unsigned long addr2; pgprot_t prot2; - addr2 = __START_KERNEL_map + ((pfn - phys_base_pfn) << PAGE_SHIFT); + addr2 = __START_KERNEL_map + __pa(address); /* Make sure the kernel mappings stay executable */ prot2 = pte_pgprot(pte_mkexec(pfn_pte(0, prot))); err = __change_page_attr(addr2, pfn, prot2, |