[S390] page fault: invoke oom-killer

s390 arch backend for 1c0fe6e3bda0464728c23c8d84aa47567e8b716c
"mm: invoke oom-killer from page fault".

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 26 deletions

diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 4d537205e83c..833e8366c351 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -200,29 +200,6 @@ static void do_low_address(struct pt_regs *regs, unsigned long error_code)
         do_no_context(regs, error_code, 0);
 }
 
-/*
- * We ran out of memory, or some other thing happened to us that made
- * us unable to handle the page fault gracefully.
- */
-static int do_out_of_memory(struct pt_regs *regs, unsigned long error_code,
-                            unsigned long address)
-{
-        struct task_struct *tsk = current;
-        struct mm_struct *mm = tsk->mm;
-
-        up_read(&mm->mmap_sem);
-        if (is_global_init(tsk)) {
-                yield();
-                down_read(&mm->mmap_sem);
-                return 1;
-        }
-        printk("VM: killing process %s\n", tsk->comm);
-        if (regs->psw.mask & PSW_MASK_PSTATE)
-                do_group_exit(SIGKILL);
-        do_no_context(regs, error_code, address);
-        return 0;
-}
-
 static void do_sigbus(struct pt_regs *regs, unsigned long error_code,
                       unsigned long address)
 {
@@ -367,7 +344,6 @@ good_area:
                         goto bad_area;
         }
 
-survive:
         if (is_vm_hugetlb_page(vma))
                 address &= HPAGE_MASK;
         /*
@@ -378,8 +354,8 @@ survive:
         fault = handle_mm_fault(mm, vma, address, write);
         if (unlikely(fault & VM_FAULT_ERROR)) {
                 if (fault & VM_FAULT_OOM) {
-                        if (do_out_of_memory(regs, error_code, address))
-                                goto survive;
+                        up_read(&mm->mmap_sem);
+                        pagefault_out_of_memory();
                         return;
                 } else if (fault & VM_FAULT_SIGBUS) {
                         do_sigbus(regs, error_code, address);