diff options
Diffstat (limited to 'arch/x86/mm/fault.c')
| -rw-r--r-- | arch/x86/mm/fault.c | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 629fdf13f846..859519f5b342 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -1310,7 +1310,7 @@ void do_user_addr_fault(struct pt_regs *regs, struct task_struct *tsk; struct mm_struct *mm; vm_fault_t fault, major = 0; - unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; + unsigned int flags = FAULT_FLAG_DEFAULT; tsk = current; mm = tsk->mm; @@ -1464,27 +1464,23 @@ good_area: fault = handle_mm_fault(vma, address, flags); major |= fault & VM_FAULT_MAJOR; + /* Quick path to respond to signals */ + if (fault_signal_pending(fault, regs)) { + if (!user_mode(regs)) + no_context(regs, hw_error_code, address, SIGBUS, + BUS_ADRERR); + return; + } + /* * If we need to retry the mmap_sem has already been released, * and if there is a fatal signal pending there is no guarantee * that we made any progress. Handle this case first. */ - if (unlikely(fault & VM_FAULT_RETRY)) { - /* Retry at most once */ - if (flags & FAULT_FLAG_ALLOW_RETRY) { - flags &= ~FAULT_FLAG_ALLOW_RETRY; - flags |= FAULT_FLAG_TRIED; - if (!fatal_signal_pending(tsk)) - goto retry; - } - - /* User mode? Just return to handle the fatal exception */ - if (flags & FAULT_FLAG_USER) - return; - - /* Not returning to user mode? Handle exceptions or die: */ - no_context(regs, hw_error_code, address, SIGBUS, BUS_ADRERR); - return; + if (unlikely((fault & VM_FAULT_RETRY) && + (flags & FAULT_FLAG_ALLOW_RETRY))) { + flags |= FAULT_FLAG_TRIED; + goto retry; } up_read(&mm->mmap_sem); |