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

Message ID 1578415992-24054-11-git-send-email-krzk@kernel.org (mailing list archive)
State RFC
Delegated to: Johannes Berg
Headers show
Series iomap: Constify ioreadX() iomem argument | expand

Commit Message

Krzysztof Kozlowski Jan. 7, 2020, 4:53 p.m. UTC 
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@kernel.org>
---
 drivers/gpu/drm/nouveau/nouveau_bo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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);
 	else
 		return *mem;
 }