[PATCH 1/4] drm/amdgpu: Explicitly add a flexible array at the end of 'struct amdgpu_bo_list'

[Christophe JAILLET]

'struct amdgpu_bo_list' is really used as if it was ended by a flex array.
So make it more explicit and add a 'struct amdgpu_bo_list_entry entries[]'
field at the end of the structure.

This way, struct_size() can be used when it is allocated.
It is less verbose.

Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c | 5 +----
 drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.h | 2 ++
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
index b6298e901cbd..571fed04eb7a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
@@ -75,7 +75,6 @@ int amdgpu_bo_list_create(struct amdgpu_device *adev, struct 
drm_file *filp,
        struct amdgpu_bo_list_entry *array;
        struct amdgpu_bo_list *list;
        uint64_t total_size = 0;
-       size_t size;
        unsigned i;
        int r;
 
@@ -83,9 +82,7 @@ int amdgpu_bo_list_create(struct amdgpu_device *adev, struct 
drm_file *filp,
                                / sizeof(struct amdgpu_bo_list_entry))
                return -EINVAL;
 
-       size = sizeof(struct amdgpu_bo_list);
-       size += num_entries * sizeof(struct amdgpu_bo_list_entry);
-       list = kvmalloc(size, GFP_KERNEL);
+       list = kvmalloc(struct_size(list, entries, num_entries), GFP_KERNEL);
        if (!list)
                return -ENOMEM;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.h
index 26c01cb131f2..368e50b30160 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.h
@@ -55,6 +55,8 @@ struct amdgpu_bo_list {
        /* Protect access during command submission.
         */
        struct mutex bo_list_mutex;
+
+       struct amdgpu_bo_list_entry entries[];
 };
 
 int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id,
-- 
2.34.1