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-rw-r--r--arch/s390/mm/fault.c28
-rw-r--r--arch/s390/mm/init.c2
-rw-r--r--arch/s390/mm/pgtable.c6
3 files changed, 9 insertions, 27 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);
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index f0258ca3b17e..c634dfbe92e9 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -40,7 +40,9 @@
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE)));
+
char empty_zero_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+EXPORT_SYMBOL(empty_zero_page);
/*
* paging_init() sets up the page tables
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 6b6ddc4ea02b..be6c1cf4ad5a 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -258,6 +258,10 @@ int s390_enable_sie(void)
struct task_struct *tsk = current;
struct mm_struct *mm, *old_mm;
+ /* Do we have switched amode? If no, we cannot do sie */
+ if (!switch_amode)
+ return -EINVAL;
+
/* Do we have pgstes? if yes, we are done */
if (tsk->mm->context.has_pgste)
return 0;
@@ -292,7 +296,7 @@ int s390_enable_sie(void)
tsk->mm = tsk->active_mm = mm;
preempt_disable();
update_mm(mm, tsk);
- cpu_set(smp_processor_id(), mm->cpu_vm_mask);
+ cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
preempt_enable();
task_unlock(tsk);
mmput(old_mm);