diff options
Diffstat (limited to 'arch/um/kernel/tt/tlb.c')
| -rw-r--r-- | arch/um/kernel/tt/tlb.c | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/arch/um/kernel/tt/tlb.c b/arch/um/kernel/tt/tlb.c index f1d85db..ae6217c 100644 --- a/arch/um/kernel/tt/tlb.c +++ b/arch/um/kernel/tt/tlb.c @@ -74,42 +74,6 @@ void flush_tlb_kernel_range_tt(unsigned long start, unsigned long end) atomic_inc(&vmchange_seq); } -static void protect_vm_page(unsigned long addr, int w, int must_succeed) -{ - int err; - - err = protect_memory(addr, PAGE_SIZE, 1, w, 1, must_succeed); - if(err == 0) return; - else if((err == -EFAULT) || (err == -ENOMEM)){ - flush_tlb_kernel_range(addr, addr + PAGE_SIZE); - protect_vm_page(addr, w, 1); - } - else panic("protect_vm_page : protect failed, errno = %d\n", err); -} - -void mprotect_kernel_vm(int w) -{ - struct mm_struct *mm; - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - unsigned long addr; - - mm = &init_mm; - for(addr = start_vm; addr < end_vm;){ - pgd = pgd_offset(mm, addr); - pud = pud_offset(pgd, addr); - pmd = pmd_offset(pud, addr); - if(pmd_present(*pmd)){ - pte = pte_offset_kernel(pmd, addr); - if(pte_present(*pte)) protect_vm_page(addr, w, 0); - addr += PAGE_SIZE; - } - else addr += PMD_SIZE; - } -} - void flush_tlb_kernel_vm_tt(void) { flush_tlb_kernel_range(start_vm, end_vm); |
