diff options
Diffstat (limited to 'arch/s390/mm/fault.c')
| -rw-r--r-- | arch/s390/mm/fault.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 095f782a551..9564fc779b2 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -303,9 +303,24 @@ static inline int do_exception(struct pt_regs *regs, int access, flags = FAULT_FLAG_ALLOW_RETRY; if (access == VM_WRITE || (trans_exc_code & store_indication) == 0x400) flags |= FAULT_FLAG_WRITE; -retry: down_read(&mm->mmap_sem); +#ifdef CONFIG_PGSTE + if (test_tsk_thread_flag(current, TIF_SIE) && S390_lowcore.gmap) { + address = gmap_fault(address, + (struct gmap *) S390_lowcore.gmap); + if (address == -EFAULT) { + fault = VM_FAULT_BADMAP; + goto out_up; + } + if (address == -ENOMEM) { + fault = VM_FAULT_OOM; + goto out_up; + } + } +#endif + +retry: fault = VM_FAULT_BADMAP; vma = find_vma(mm, address); if (!vma) @@ -356,6 +371,7 @@ retry: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + down_read(&mm->mmap_sem); goto retry; } } |