diff options
| -rw-r--r-- | arch/x86/mm/pageattr.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index effcd78d5f4..d18c41d752f 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -3,6 +3,7 @@ * Thanks to Ben LaHaise for precious feedback. */ #include <linux/highmem.h> +#include <linux/bootmem.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/slab.h> @@ -144,13 +145,15 @@ out_unlock: } static int -__change_page_attr(unsigned long address, struct page *page, pgprot_t prot) +__change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot) { struct page *kpte_page; int level, err = 0; pte_t *kpte; - BUG_ON(PageHighMem(page)); +#ifdef CONFIG_X86_32 + BUG_ON(pfn > max_low_pfn); +#endif repeat: kpte = lookup_address(address, &level); @@ -164,7 +167,7 @@ repeat: prot = check_exec(prot, address); if (level == PG_LEVEL_4K) { - set_pte_atomic(kpte, mk_pte(page, canon_pgprot(prot))); + set_pte_atomic(kpte, pfn_pte(pfn, canon_pgprot(prot))); } else { err = split_large_page(kpte, address); if (!err) @@ -203,7 +206,7 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot) unsigned long pfn = __pa(address) >> PAGE_SHIFT; if (!kernel_map || pte_present(pfn_pte(0, prot))) { - err = __change_page_attr(address, pfn_to_page(pfn), prot); + err = __change_page_attr(address, pfn, prot); if (err) break; } @@ -219,7 +222,7 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot) 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_to_page(pfn), prot2); + err = __change_page_attr(addr2, pfn, prot2); } #endif } |