diff options
Diffstat (limited to 'arch/s390/include/asm/mmu_context.h')
| -rw-r--r-- | arch/s390/include/asm/mmu_context.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h index 4c2fbf48c9c..28ec870655a 100644 --- a/arch/s390/include/asm/mmu_context.h +++ b/arch/s390/include/asm/mmu_context.h @@ -20,12 +20,25 @@ static inline int init_new_context(struct task_struct *tsk, #ifdef CONFIG_64BIT mm->context.asce_bits |= _ASCE_TYPE_REGION3; #endif - if (current->mm->context.pgstes) { + if (current->mm->context.alloc_pgste) { + /* + * alloc_pgste indicates, that any NEW context will be created + * with extended page tables. The old context is unchanged. The + * page table allocation and the page table operations will + * look at has_pgste to distinguish normal and extended page + * tables. The only way to create extended page tables is to + * set alloc_pgste and then create a new context (e.g. dup_mm). + * The page table allocation is called after init_new_context + * and if has_pgste is set, it will create extended page + * tables. + */ mm->context.noexec = 0; - mm->context.pgstes = 1; + mm->context.has_pgste = 1; + mm->context.alloc_pgste = 1; } else { mm->context.noexec = s390_noexec; - mm->context.pgstes = 0; + mm->context.has_pgste = 0; + mm->context.alloc_pgste = 0; } mm->context.asce_limit = STACK_TOP_MAX; crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm)); |