diff options
Diffstat (limited to 'arch/s390/mm/fault.c')
| -rw-r--r-- | arch/s390/mm/fault.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 5a9e9a77dc16..fc102e70d9c2 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -442,6 +442,29 @@ no_context: } #endif +int __handle_fault(unsigned long uaddr, unsigned long int_code, int write_user) +{ + struct pt_regs regs; + int access, fault; + + regs.psw.mask = psw_kernel_bits; + if (!irqs_disabled()) + regs.psw.mask |= PSW_MASK_IO | PSW_MASK_EXT; + 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; + 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); + } + return fault ? -EFAULT : 0; +} + #ifdef CONFIG_PFAULT /* * 'pfault' pseudo page faults routines. |