Just like other generic locks, insert a full barrier
in case of memory reorder.
Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
---
drivers/staging/erofs/internal.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index 2e0ef92c138b..f77653d33633 100644
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -209,6 +209,7 @@ static inline bool erofs_workgroup_try_to_freeze(struct erofs_workgroup *grp,
static inline void erofs_workgroup_unfreeze(struct erofs_workgroup *grp,
int orig_val)
{
+ smp_mb();
atomic_set(&grp->refcount, orig_val);
preempt_enable();
}
--
2.14.4
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
