Use the proper macro do to these sizeof calculations.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
index 958fd78080bd..b9648290dffb 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
@@ -53,7 +53,7 @@ nvkm_vmm_pt_new(const struct nvkm_vmm_desc *desc, bool sparse,
 		}
 	}
 
-	if (!(pgt = kzalloc(sizeof(*pgt) + (sizeof(pgt->pte[0]) * lpte), GFP_KERNEL)))
+	if (!(pgt = kzalloc_flex(*pgt, pte, lpte)))
 		return NULL;
 	pgt->page = page ? page->shift : 0;
 	pgt->sparse = sparse;
-- 
2.53.0