s390/mm: fix race on mm->context.flush_mm

[mirror_ubuntu-artful-kernel.git] / arch / s390 / include / asm / mmu.h

diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h
index bd6f303045185b7dbb2a4bc4a14d4c7729a84e4a..3525fe6e7e4c55f01c20ca541a0400847313bd80 100644 (file)
--- a/arch/s390/include/asm/mmu.h
+++ b/arch/s390/include/asm/mmu.h
@@ -5,6 +5,7 @@
 #include <linux/errno.h>
 
 typedef struct {
+       spinlock_t lock;
        cpumask_t cpu_attach_mask;
        atomic_t flush_count;
        unsigned int flush_mm;
@@ -27,6 +28,7 @@ typedef struct {
 } mm_context_t;
 
 #define INIT_MM_CONTEXT(name)                                             \
+       .context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock),           \
        .context.pgtable_lock =                                            \
                        __SPIN_LOCK_UNLOCKED(name.context.pgtable_lock),   \
        .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \