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[RESEND PATCH v2 7/9] drm/nouveau: Constify ioreadX() iomem argument (as in generic implementation)

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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 1b62ccc57aef..d95bdd65dbca 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);
 	else
 		return *mem;
 }
-- 
2.17.1




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