diff options
Diffstat (limited to 'arch/s390/mm/fault.c')
| -rw-r--r-- | arch/s390/mm/fault.c | 36 |
1 files changed, 14 insertions, 22 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index bae2c282221..b6570069b12 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -333,12 +333,6 @@ static inline int do_exception(struct pt_regs *regs, int access, goto out; address = trans_exc_code & __FAIL_ADDR_MASK; - /* - * When we get here, the fault happened in the current - * task's user address space, so we can switch on the - * interrupts again and then search the VMAs - */ - local_irq_enable(); perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address); down_read(&mm->mmap_sem); @@ -397,20 +391,20 @@ out: return fault; } -void __kprobes do_protection_exception(struct pt_regs *regs, long int_code) +void __kprobes do_protection_exception(struct pt_regs *regs, long pgm_int_code, + unsigned long trans_exc_code) { - unsigned long trans_exc_code = S390_lowcore.trans_exc_code; int fault; /* Protection exception is supressing, decrement psw address. */ - regs->psw.addr -= (int_code >> 16); + regs->psw.addr -= (pgm_int_code >> 16); /* * Check for low-address protection. This needs to be treated * as a special case because the translation exception code * field is not guaranteed to contain valid data in this case. */ if (unlikely(!(trans_exc_code & 4))) { - do_low_address(regs, int_code, trans_exc_code); + do_low_address(regs, pgm_int_code, trans_exc_code); return; } fault = do_exception(regs, VM_WRITE, trans_exc_code); @@ -418,9 +412,9 @@ void __kprobes do_protection_exception(struct pt_regs *regs, long int_code) do_fault_error(regs, 4, trans_exc_code, fault); } -void __kprobes do_dat_exception(struct pt_regs *regs, long int_code) +void __kprobes do_dat_exception(struct pt_regs *regs, long pgm_int_code, + unsigned long trans_exc_code) { - unsigned long trans_exc_code = S390_lowcore.trans_exc_code; int access, fault; access = VM_READ | VM_EXEC | VM_WRITE; @@ -431,21 +425,19 @@ void __kprobes do_dat_exception(struct pt_regs *regs, long int_code) #endif fault = do_exception(regs, access, trans_exc_code); if (unlikely(fault)) - do_fault_error(regs, int_code & 255, trans_exc_code, fault); + do_fault_error(regs, pgm_int_code & 255, trans_exc_code, fault); } #ifdef CONFIG_64BIT -void __kprobes do_asce_exception(struct pt_regs *regs, long int_code) +void __kprobes do_asce_exception(struct pt_regs *regs, long pgm_int_code, + unsigned long trans_exc_code) { - unsigned long trans_exc_code = S390_lowcore.trans_exc_code; struct mm_struct *mm = current->mm; struct vm_area_struct *vma; if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm)) goto no_context; - local_irq_enable(); - down_read(&mm->mmap_sem); vma = find_vma(mm, trans_exc_code & __FAIL_ADDR_MASK); up_read(&mm->mmap_sem); @@ -457,16 +449,16 @@ void __kprobes do_asce_exception(struct pt_regs *regs, long int_code) /* User mode accesses just cause a SIGSEGV */ if (regs->psw.mask & PSW_MASK_PSTATE) { - do_sigsegv(regs, int_code, SEGV_MAPERR, trans_exc_code); + do_sigsegv(regs, pgm_int_code, SEGV_MAPERR, trans_exc_code); return; } no_context: - do_no_context(regs, int_code, trans_exc_code); + do_no_context(regs, pgm_int_code, trans_exc_code); } #endif -int __handle_fault(unsigned long uaddr, unsigned long int_code, int write_user) +int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write) { struct pt_regs regs; int access, fault; @@ -477,14 +469,14 @@ int __handle_fault(unsigned long uaddr, unsigned long int_code, int write_user) regs.psw.addr = (unsigned long) __builtin_return_address(0); regs.psw.addr |= PSW_ADDR_AMODE; uaddr &= PAGE_MASK; - access = write_user ? VM_WRITE : VM_READ; + access = write ? VM_WRITE : VM_READ; fault = do_exception(®s, access, uaddr | 2); if (unlikely(fault)) { if (fault & VM_FAULT_OOM) { pagefault_out_of_memory(); fault = 0; } else if (fault & VM_FAULT_SIGBUS) - do_sigbus(®s, int_code, uaddr); + do_sigbus(®s, pgm_int_code, uaddr); } return fault ? -EFAULT : 0; } |