[PATCH 3/4] vfio/spapr_tce: use mmgrab

Julia Lawall
2019-12-29T16:19:50Z

Mmgrab was introduced in commit f1f1007644ff ("mm: add new mmgrab()
helper") and most of the kernel was updated to use it. Update a
remaining file.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

<smpl>
@@ expression e; @@
- atomic_inc(&e->mm_count);
+ mmgrab(e);
</smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

---
drivers/vfio/vfio_iommu_spapr_tce.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 26cef65b41e7..16b3adc508db 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -79,7 +79,7 @@ static long tce_iommu_mm_set(struct tce_container *container)
}
BUG_ON(!current->mm);
container->mm = current->mm;
- atomic_inc(&container->mm->mm_count);
+ mmgrab(container->mm);

return 0;
}