[PATCH 3/4] drm/gpuvm: use const for drm_gpuva_op_* ptrs

[Alice Ryhl <aliceryhl@google.com>]

These methods just read the values stored in the op pointers without
modifying them, so it is appropriate to use const ptrs here.

This allows us to avoid const -> mut pointer casts in Rust.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
---
 drivers/gpu/drm/drm_gpuvm.c | 6 +++---
 include/drm/drm_gpuvm.h     | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/drm_gpuvm.c b/drivers/gpu/drm/drm_gpuvm.c
index 9cd06c7600dc32ceee0f0beb5e3daf31698a66b3..e06b58aabb8ea6ebd92c625583ae2852c9d2caf1 100644
--- a/drivers/gpu/drm/drm_gpuvm.c
+++ b/drivers/gpu/drm/drm_gpuvm.c
@@ -2283,7 +2283,7 @@ EXPORT_SYMBOL_GPL(drm_gpuvm_interval_empty);
 void
 drm_gpuva_map(struct drm_gpuvm *gpuvm,
 	      struct drm_gpuva *va,
-	      struct drm_gpuva_op_map *op)
+	      const struct drm_gpuva_op_map *op)
 {
 	drm_gpuva_init_from_op(va, op);
 	drm_gpuva_insert(gpuvm, va);
@@ -2303,7 +2303,7 @@ EXPORT_SYMBOL_GPL(drm_gpuva_map);
 void
 drm_gpuva_remap(struct drm_gpuva *prev,
 		struct drm_gpuva *next,
-		struct drm_gpuva_op_remap *op)
+		const struct drm_gpuva_op_remap *op)
 {
 	struct drm_gpuva *va = op->unmap->va;
 	struct drm_gpuvm *gpuvm = va->vm;
@@ -2330,7 +2330,7 @@ EXPORT_SYMBOL_GPL(drm_gpuva_remap);
  * Removes the &drm_gpuva associated with the &drm_gpuva_op_unmap.
  */
 void
-drm_gpuva_unmap(struct drm_gpuva_op_unmap *op)
+drm_gpuva_unmap(const struct drm_gpuva_op_unmap *op)
 {
 	drm_gpuva_remove(op->va);
 }
diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h
index 0d3fc1f6cac9966a42f3bc82b0b491bfefaf5b96..655bd9104ffb24170fca14dfa034ee79f5400930 100644
--- a/include/drm/drm_gpuvm.h
+++ b/include/drm/drm_gpuvm.h
@@ -1121,7 +1121,7 @@ void drm_gpuva_ops_free(struct drm_gpuvm *gpuvm,
 			struct drm_gpuva_ops *ops);
 
 static inline void drm_gpuva_init_from_op(struct drm_gpuva *va,
-					  struct drm_gpuva_op_map *op)
+					  const struct drm_gpuva_op_map *op)
 {
 	va->va.addr = op->va.addr;
 	va->va.range = op->va.range;
@@ -1265,13 +1265,13 @@ int drm_gpuvm_sm_unmap_exec_lock(struct drm_gpuvm *gpuvm, struct drm_exec *exec,
 
 void drm_gpuva_map(struct drm_gpuvm *gpuvm,
 		   struct drm_gpuva *va,
-		   struct drm_gpuva_op_map *op);
+		   const struct drm_gpuva_op_map *op);
 
 void drm_gpuva_remap(struct drm_gpuva *prev,
 		     struct drm_gpuva *next,
-		     struct drm_gpuva_op_remap *op);
+		     const struct drm_gpuva_op_remap *op);
 
-void drm_gpuva_unmap(struct drm_gpuva_op_unmap *op);
+void drm_gpuva_unmap(const struct drm_gpuva_op_unmap *op);
 
 /**
  * drm_gpuva_op_remap_to_unmap_range() - Helper to get the start and range of

-- 
2.52.0.487.g5c8c507ade-goog