diff options
Diffstat (limited to 'arch/m32r/mm/fault.c')
| -rw-r--r-- | arch/m32r/mm/fault.c | 35 |
1 files changed, 15 insertions, 20 deletions
diff --git a/arch/m32r/mm/fault.c b/arch/m32r/mm/fault.c index 4a71df4c1b3..e9c6a8014bd 100644 --- a/arch/m32r/mm/fault.c +++ b/arch/m32r/mm/fault.c @@ -26,7 +26,6 @@ #include <linux/module.h> #include <asm/m32r.h> -#include <asm/system.h> #include <asm/uaccess.h> #include <asm/hardirq.h> #include <asm/mmu_context.h> @@ -79,7 +78,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, struct mm_struct *mm; struct vm_area_struct * vma; unsigned long page, addr; - int write; + unsigned long flags = 0; int fault; siginfo_t info; @@ -118,9 +117,12 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, if (in_atomic() || !mm) goto bad_area_nosemaphore; + if (error_code & ACE_USERMODE) + flags |= FAULT_FLAG_USER; + /* When running in the kernel we expect faults to occur only to * addresses in user space. All other faults represent errors in the - * kernel and should generate an OOPS. Unfortunatly, in the case of an + * kernel and should generate an OOPS. Unfortunately, in the case of an * erroneous fault occurring in a code path which already holds mmap_sem * we will deadlock attempting to validate the fault against the * address space. Luckily the kernel only validly references user @@ -128,7 +130,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, * exceptions table. * * As the vast majority of faults will be valid we will only perform - * the source reference check when there is a possibilty of a deadlock. + * the source reference check when there is a possibility of a deadlock. * Attempt to lock the address space, if we cannot we then validate the * source. If this is invalid we can skip the address space check, * thus avoiding the deadlock. @@ -167,14 +169,13 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, */ good_area: info.si_code = SEGV_ACCERR; - write = 0; switch (error_code & (ACE_WRITE|ACE_PROTECTION)) { default: /* 3: write, present */ /* fall through */ case ACE_WRITE: /* write, not present */ if (!(vma->vm_flags & VM_WRITE)) goto bad_area; - write++; + flags |= FAULT_FLAG_WRITE; break; case ACE_PROTECTION: /* read, present */ case 0: /* read, not present */ @@ -188,7 +189,6 @@ good_area: if ((error_code & ACE_INSTRUCTION) && !(vma->vm_flags & VM_EXEC)) goto bad_area; -survive: /* * If for any reason at all we couldn't handle the fault, * make sure we exit gracefully rather than endlessly redo @@ -196,7 +196,7 @@ survive: */ addr = (address & PAGE_MASK); set_thread_fault_code(error_code); - fault = handle_mm_fault(mm, vma, addr, write); + fault = handle_mm_fault(mm, vma, addr, flags); if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) goto out_of_memory; @@ -271,15 +271,10 @@ no_context: */ out_of_memory: up_read(&mm->mmap_sem); - if (is_global_init(tsk)) { - yield(); - down_read(&mm->mmap_sem); - goto survive; - } - printk("VM: killing process %s\n", tsk->comm); - if (error_code & ACE_USERMODE) - do_group_exit(SIGKILL); - goto no_context; + if (!(error_code & ACE_USERMODE)) + goto no_context; + pagefault_out_of_memory(); + return; do_sigbus: up_read(&mm->mmap_sem); @@ -336,7 +331,7 @@ vmalloc_fault: addr = (address & PAGE_MASK); set_thread_fault_code(error_code); - update_mmu_cache(NULL, addr, *pte_k); + update_mmu_cache(NULL, addr, pte_k); set_thread_fault_code(0); return; } @@ -349,7 +344,7 @@ vmalloc_fault: #define ITLB_END (unsigned long *)(ITLB_BASE + (NR_TLB_ENTRIES * 8)) #define DTLB_END (unsigned long *)(DTLB_BASE + (NR_TLB_ENTRIES * 8)) void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr, - pte_t pte) + pte_t *ptep) { volatile unsigned long *entry1, *entry2; unsigned long pte_data, flags; @@ -365,7 +360,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr, vaddr = (vaddr & PAGE_MASK) | get_asid(); - pte_data = pte_val(pte); + pte_data = pte_val(*ptep); #ifdef CONFIG_CHIP_OPSP entry1 = (unsigned long *)ITLB_BASE; |