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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 #ifndef _DRM_DEVICE_H_
 #define _DRM_DEVICE_H_
 
 #include <linux/list.h>
 #include <linux/kref.h>
 #include <linux/mutex.h>
 #include <linux/idr.h>
 
 #include <drm/drm_legacy.h>
 #include <drm/drm_mode_config.h>
 
 struct drm_driver;
 struct drm_minor;
 struct drm_master;
 struct drm_vblank_crtc;
 struct drm_vma_offset_manager;
 struct drm_vram_mm;
 struct drm_fb_helper;
 
 struct inode;
 
 struct pci_dev;
 struct pci_controller;
 
 
 /**
  * enum switch_power_state - power state of drm device
  */
 
 enum switch_power_state {
     /** @DRM_SWITCH_POWER_ON: Power state is ON */
     DRM_SWITCH_POWER_ON = 0,
 
     /** @DRM_SWITCH_POWER_OFF: Power state is OFF */
     DRM_SWITCH_POWER_OFF = 1,
 
     /** @DRM_SWITCH_POWER_CHANGING: Power state is changing */
     DRM_SWITCH_POWER_CHANGING = 2,
 
     /** @DRM_SWITCH_POWER_DYNAMIC_OFF: Suspended */
     DRM_SWITCH_POWER_DYNAMIC_OFF = 3,
 };
 
 /**
  * struct drm_device - DRM device structure
  *
  * This structure represent a complete card that
  * may contain multiple heads.
  */
 struct drm_device {
     /** @if_version: Highest interface version set */
     int if_version;
 
     /** @ref: Object ref-count */
     struct kref ref;
 
     /** @dev: Device structure of bus-device */
     struct device *dev;
 
     /**
      * @managed:
      *
      * Managed resources linked to the lifetime of this &drm_device as
      * tracked by @ref.
      */
     struct {
         /** @managed.resources: managed resources list */
         struct list_head resources;
         /** @managed.final_kfree: pointer for final kfree() call */
         void *final_kfree;
         /** @managed.lock: protects @managed.resources */
         spinlock_t lock;
     } managed;
 
     /** @driver: DRM driver managing the device */
     const struct drm_driver *driver;
 
     /**
      * @dev_private:
      *
      * DRM driver private data. This is deprecated and should be left set to
      * NULL.
      *
      * Instead of using this pointer it is recommended that drivers use
      * devm_drm_dev_alloc() and embed struct &drm_device in their larger
      * per-device structure.
      */
     void *dev_private;
 
     /** @primary: Primary node */
     struct drm_minor *primary;
 
     /** @render: Render node */
     struct drm_minor *render;
 
     /**
      * @registered:
      *
      * Internally used by drm_dev_register() and drm_connector_register().
      */
     bool registered;
 
     /**
      * @master:
      *
      * Currently active master for this device.
      * Protected by &master_mutex
      */
     struct drm_master *master;
 
     /**
      * @driver_features: per-device driver features
      *
      * Drivers can clear specific flags here to disallow
      * certain features on a per-device basis while still
      * sharing a single &struct drm_driver instance across
      * all devices.
      */
     u32 driver_features;
 
     /**
      * @unplugged:
      *
      * Flag to tell if the device has been unplugged.
      * See drm_dev_enter() and drm_dev_is_unplugged().
      */
     bool unplugged;
 
     /** @anon_inode: inode for private address-space */
     struct inode *anon_inode;
 
     /** @unique: Unique name of the device */
     char *unique;
 
     /**
      * @struct_mutex:
      *
      * Lock for others (not &drm_minor.master and &drm_file.is_master)
      *
      * WARNING:
      * Only drivers annotated with DRIVER_LEGACY should be using this.
      */
     struct mutex struct_mutex;
 
     /**
      * @master_mutex:
      *
      * Lock for &drm_minor.master and &drm_file.is_master
      */
     struct mutex master_mutex;
 
     /**
      * @open_count:
      *
      * Usage counter for outstanding files open,
      * protected by drm_global_mutex
      */
     atomic_t open_count;
 
     /** @filelist_mutex: Protects @filelist. */
     struct mutex filelist_mutex;
     /**
      * @filelist:
      *
      * List of userspace clients, linked through &drm_file.lhead.
      */
     struct list_head filelist;
 
     /**
      * @filelist_internal:
      *
      * List of open DRM files for in-kernel clients.
      * Protected by &filelist_mutex.
      */
     struct list_head filelist_internal;
 
     /**
      * @clientlist_mutex:
      *
      * Protects &clientlist access.
      */
     struct mutex clientlist_mutex;
 
     /**
      * @clientlist:
      *
      * List of in-kernel clients. Protected by &clientlist_mutex.
      */
     struct list_head clientlist;
 
     /**
      * @vblank_disable_immediate:
      *
      * If true, vblank interrupt will be disabled immediately when the
      * refcount drops to zero, as opposed to via the vblank disable
      * timer.
      *
      * This can be set to true it the hardware has a working vblank counter
      * with high-precision timestamping (otherwise there are races) and the
      * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off()
      * appropriately. See also @max_vblank_count and
      * &drm_crtc_funcs.get_vblank_counter.
      */
     bool vblank_disable_immediate;
 
     /**
      * @vblank:
      *
      * Array of vblank tracking structures, one per &struct drm_crtc. For
      * historical reasons (vblank support predates kernel modesetting) this
      * is free-standing and not part of &struct drm_crtc itself. It must be
      * initialized explicitly by calling drm_vblank_init().
      */
     struct drm_vblank_crtc *vblank;
 
     /**
      * @vblank_time_lock:
      *
      *  Protects vblank count and time updates during vblank enable/disable
      */
     spinlock_t vblank_time_lock;
     /**
      * @vbl_lock: Top-level vblank references lock, wraps the low-level
      * @vblank_time_lock.
      */
     spinlock_t vbl_lock;
 
     /**
      * @max_vblank_count:
      *
      * Maximum value of the vblank registers. This value +1 will result in a
      * wrap-around of the vblank register. It is used by the vblank core to
      * handle wrap-arounds.
      *
      * If set to zero the vblank core will try to guess the elapsed vblanks
      * between times when the vblank interrupt is disabled through
      * high-precision timestamps. That approach is suffering from small
      * races and imprecision over longer time periods, hence exposing a
      * hardware vblank counter is always recommended.
      *
      * This is the statically configured device wide maximum. The driver
      * can instead choose to use a runtime configurable per-crtc value
      * &drm_vblank_crtc.max_vblank_count, in which case @max_vblank_count
      * must be left at zero. See drm_crtc_set_max_vblank_count() on how
      * to use the per-crtc value.
      *
      * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set.
      */
     u32 max_vblank_count;
 
     /** @vblank_event_list: List of vblank events */
     struct list_head vblank_event_list;
 
     /**
      * @event_lock:
      *
      * Protects @vblank_event_list and event delivery in
      * general. See drm_send_event() and drm_send_event_locked().
      */
     spinlock_t event_lock;
 
     /** @num_crtcs: Number of CRTCs on this device */
     unsigned int num_crtcs;
 
     /** @mode_config: Current mode config */
     struct drm_mode_config mode_config;
 
     /** @object_name_lock: GEM information */
     struct mutex object_name_lock;
 
     /** @object_name_idr: GEM information */
     struct idr object_name_idr;
 
     /** @vma_offset_manager: GEM information */
     struct drm_vma_offset_manager *vma_offset_manager;
 
     /** @vram_mm: VRAM MM memory manager */
     struct drm_vram_mm *vram_mm;
 
     /**
      * @switch_power_state:
      *
      * Power state of the client.
      * Used by drivers supporting the switcheroo driver.
      * The state is maintained in the
      * &vga_switcheroo_client_ops.set_gpu_state callback
      */
     enum switch_power_state switch_power_state;
 
     /**
      * @fb_helper:
      *
      * Pointer to the fbdev emulation structure.
      * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
      */
     struct drm_fb_helper *fb_helper;
 
     /* Everything below here is for legacy driver, never use! */
     /* private: */
 #if IS_ENABLED(CONFIG_DRM_LEGACY)
     /* List of devices per driver for stealth attach cleanup */
     struct list_head legacy_dev_list;
 
 #ifdef __alpha__
     /** @hose: PCI hose, only used on ALPHA platforms. */
     struct pci_controller *hose;
 #endif
 
     /* AGP data */
     struct drm_agp_head *agp;
 
     /* Context handle management - linked list of context handles */
     struct list_head ctxlist;
 
     /* Context handle management - mutex for &ctxlist */
     struct mutex ctxlist_mutex;
 
     /* Context handle management */
     struct idr ctx_idr;
 
     /* Memory management - linked list of regions */
     struct list_head maplist;
 
     /* Memory management - user token hash table for maps */
     struct drm_open_hash map_hash;
 
     /* Context handle management - list of vmas (for debugging) */
     struct list_head vmalist;
 
     /* Optional pointer for DMA support */
     struct drm_device_dma *dma;
 
     /* Context swapping flag */
     __volatile__ long context_flag;
 
     /* Last current context */
     int last_context;
 
     /* Lock for &buf_use and a few other things. */
     spinlock_t buf_lock;
 
     /* Usage counter for buffers in use -- cannot alloc */
     int buf_use;
 
     /* Buffer allocation in progress */
     atomic_t buf_alloc;
 
     struct {
         int context;
         struct drm_hw_lock *lock;
     } sigdata;
 
     struct drm_local_map *agp_buffer_map;
     unsigned int agp_buffer_token;
 
     /* Scatter gather memory */
     struct drm_sg_mem *sg;
 
     /* IRQs */
     bool irq_enabled;
     int irq;
 #endif
 };
 
 #endif

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