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drm/gem: Drop struct_mutex requirement from drm_gem_mmap_obj

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commit 131e663bd6
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 9 23:32:33 2015 +0200

    drm/gem: rip out drm vma accounting for gem mmaps

there is no need for this any more.

v2: Fixup compile noise spotted by 0-day build.

Link: http://mid.gmane.org/1444894601-5200-9-git-send-email-daniel.vetter@ffwll.ch
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2015-10-15 09:36:24 +02:00
parent 70d994704e
commit 4e270f0880
6 changed files with 0 additions and 19 deletions
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4
drivers/gpu/drm/drm_gem.c
View File

@ -810,8 +810,6 @@ EXPORT_SYMBOL(drm_gem_vm_close);
* drm_gem_mmap() prevents unprivileged users from mapping random objects. So * drm_gem_mmap() prevents unprivileged users from mapping random objects. So
* callers must verify access restrictions before calling this helper. * callers must verify access restrictions before calling this helper.
* *
* NOTE: This function has to be protected with dev->struct_mutex
*
* Return 0 or success or -EINVAL if the object size is smaller than the VMA * Return 0 or success or -EINVAL if the object size is smaller than the VMA
* size, or if no gem_vm_ops are provided. * size, or if no gem_vm_ops are provided.
*/ */
@ -820,8 +818,6 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
{ {
struct drm_device *dev = obj->dev; struct drm_device *dev = obj->dev;
lockdep_assert_held(&dev->struct_mutex);
/* Check for valid size. */ /* Check for valid size. */
if (obj_size < vma->vm_end - vma->vm_start) if (obj_size < vma->vm_end - vma->vm_start)
return -EINVAL; return -EINVAL;

2
drivers/gpu/drm/drm_gem_cma_helper.c
View File

@ -484,9 +484,7 @@ int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
struct drm_device *dev = obj->dev; struct drm_device *dev = obj->dev;
int ret; int ret;
mutex_lock(&dev->struct_mutex);
ret = drm_gem_mmap_obj(obj, obj->size, vma); ret = drm_gem_mmap_obj(obj, obj->size, vma);
mutex_unlock(&dev->struct_mutex);
if (ret < 0) if (ret < 0)
return ret; return ret;

5
drivers/gpu/drm/msm/msm_fbdev.c
View File

@ -68,12 +68,7 @@ static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
if (drm_device_is_unplugged(dev)) if (drm_device_is_unplugged(dev))
return -ENODEV; return -ENODEV;
mutex_lock(&dev->struct_mutex);
ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma); ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);
mutex_unlock(&dev->struct_mutex);
if (ret) { if (ret) {
pr_err("%s:drm_gem_mmap_obj fail\n", __func__); pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
return ret; return ret;

2
drivers/gpu/drm/msm/msm_gem_prime.c
View File

@ -45,9 +45,7 @@ int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
{ {
int ret; int ret;
mutex_lock(&obj->dev->struct_mutex);
ret = drm_gem_mmap_obj(obj, obj->size, vma); ret = drm_gem_mmap_obj(obj, obj->size, vma);
mutex_unlock(&obj->dev->struct_mutex);
if (ret < 0) if (ret < 0)
return ret; return ret;

3
drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
View File

@ -140,15 +140,12 @@ static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
struct vm_area_struct *vma) struct vm_area_struct *vma)
{ {
struct drm_gem_object *obj = buffer->priv; struct drm_gem_object *obj = buffer->priv;
struct drm_device *dev = obj->dev;
int ret = 0; int ret = 0;
if (WARN_ON(!obj->filp)) if (WARN_ON(!obj->filp))
return -EINVAL; return -EINVAL;
mutex_lock(&dev->struct_mutex);
ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma); ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma);
mutex_unlock(&dev->struct_mutex);
if (ret < 0) if (ret < 0)
return ret; return ret;

3
drivers/gpu/drm/rockchip/rockchip_drm_gem.c
View File

@ -79,12 +79,9 @@ static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
int rockchip_gem_mmap_buf(struct drm_gem_object *obj, int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
struct vm_area_struct *vma) struct vm_area_struct *vma)
{ {
struct drm_device *drm = obj->dev;
int ret; int ret;
mutex_lock(&drm->struct_mutex);
ret = drm_gem_mmap_obj(obj, obj->size, vma); ret = drm_gem_mmap_obj(obj, obj->size, vma);
mutex_unlock(&drm->struct_mutex);
if (ret) if (ret)
return ret; return ret;