forked from Minki/linux
099d1c290e
Lets not trick ourselves into thinking "drm_device" objects are not ref-counted. That's just utterly stupid. We manage "drm_minor" objects on each drm-device and each minor can have an unlimited number of open handles. Each of these handles has the drm_minor (and thus the drm_device) as private-data in the file-handle. Therefore, we may not destroy "drm_device" until all these handles are closed. It is *not* possible to reset all these pointers atomically and restrict access to them, and this is *not* how this is done! Instead, we use ref-counts to make sure the object is valid and not freed. Note that we currently use "dev->open_count" for that, which is *exactly* the same as a reference-count, just open coded. So this patch doesn't change any semantics on DRM devices (well, this patch just introduces the ref-count, anyway. Follow-up patches will replace open_count by it). Also note that generic VFS revoke support could allow us to drop this ref-count again. We could then just synchronously disable any fops->xy() calls. However, this is not the case, yet, and no such patches are in sight (and I seriously question the idea of dropping the ref-cnt again). Signed-off-by: David Herrmann <dh.herrmann@gmail.com> |
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| .. | ||
| i2c | ||
| ttm | ||
| drm_agpsupport.h | ||
| drm_buffer.h | ||
| drm_cache.h | ||
| drm_core.h | ||
| drm_crtc_helper.h | ||
| drm_crtc.h | ||
| drm_dp_helper.h | ||
| drm_edid.h | ||
| drm_encoder_slave.h | ||
| drm_fb_cma_helper.h | ||
| drm_fb_helper.h | ||
| drm_fixed.h | ||
| drm_flip_work.h | ||
| drm_gem_cma_helper.h | ||
| drm_global.h | ||
| drm_hashtab.h | ||
| drm_mem_util.h | ||
| drm_memory.h | ||
| drm_mipi_dsi.h | ||
| drm_mm.h | ||
| drm_os_linux.h | ||
| drm_panel.h | ||
| drm_pciids.h | ||
| drm_rect.h | ||
| drm_sysfs.h | ||
| drm_usb.h | ||
| drm_vma_manager.h | ||
| drmP.h | ||
| exynos_drm.h | ||
| gma_drm.h | ||
| i915_drm.h | ||
| i915_pciids.h | ||
| i915_powerwell.h | ||
| intel-gtt.h | ||