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- From 997e91885e700a7b175c98f0e64670ed4fd57bc0 Mon Sep 17 00:00:00 2001
- From: Eric Anholt <eric@anholt.net>
- Date: Wed, 19 Nov 2014 12:06:38 -0800
- Subject: [PATCH] drm: Put an optional field in the driver struct for GEM obj
- struct size.
- This allows a driver to derive from the CMA object without copying all
- of the code.
- Signed-off-by: Eric Anholt <eric@anholt.net>
- ---
- drivers/gpu/drm/drm_gem_cma_helper.c | 5 ++++-
- include/drm/drmP.h | 1 +
- 2 files changed, 5 insertions(+), 1 deletion(-)
- --- a/drivers/gpu/drm/drm_gem_cma_helper.c
- +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
- @@ -58,8 +58,11 @@ __drm_gem_cma_create(struct drm_device *
- struct drm_gem_cma_object *cma_obj;
- struct drm_gem_object *gem_obj;
- int ret;
- + size_t obj_size = (drm->driver->gem_obj_size ?
- + drm->driver->gem_obj_size :
- + sizeof(*cma_obj));
-
- - cma_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);
- + cma_obj = kzalloc(obj_size, GFP_KERNEL);
- if (!cma_obj)
- return ERR_PTR(-ENOMEM);
-
- --- a/include/drm/drmP.h
- +++ b/include/drm/drmP.h
- @@ -653,6 +653,7 @@ struct drm_driver {
-
- u32 driver_features;
- int dev_priv_size;
- + size_t gem_obj_size;
- const struct drm_ioctl_desc *ioctls;
- int num_ioctls;
- const struct file_operations *fops;
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