[RFT 08/13] drm/nouveau: Constify ioreadX() iomem argument (as in generic implementation)

From: Krzysztof Kozlowski
Date: Tue Jan 07 2020 - 11:55:00 EST

The ioreadX() helpers have inconsistent interface. On some architectures
void *__iomem address argument is a pointer to const, on some not.

Implementations of ioreadX() do not modify the memory under the address
so they can be converted to a "const" version for const-safety and
consistency among architectures.

Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
drivers/gpu/drm/nouveau/nouveau_bo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index f8015e0318d7..5120d062c2df 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -613,7 +613,7 @@ nouveau_bo_rd32(struct nouveau_bo *nvbo, unsigned index)
mem += index;

if (is_iomem)
- return ioread32_native((void __force __iomem *)mem);
+ return ioread32_native((const void __force __iomem *)mem);
return *mem;