drm/ttm/ttm_bo: Fix one function header - demote lots of kernel-doc abuses

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/ttm/ttm_bo.c:51: warning: Function parameter or member 'ttm_global_mutex' not described in 'DEFINE_MUTEX'
 drivers/gpu/drm/ttm/ttm_bo.c:286: warning: Function parameter or member 'bo' not described in 'ttm_bo_cleanup_memtype_use'
 drivers/gpu/drm/ttm/ttm_bo.c:359: warning: Function parameter or member 'bo' not described in 'ttm_bo_cleanup_refs'
 drivers/gpu/drm/ttm/ttm_bo.c:359: warning: Function parameter or member 'interruptible' not described in 'ttm_bo_cleanup_refs'
 drivers/gpu/drm/ttm/ttm_bo.c:359: warning: Function parameter or member 'no_wait_gpu' not described in 'ttm_bo_cleanup_refs'
 drivers/gpu/drm/ttm/ttm_bo.c:359: warning: Function parameter or member 'unlock_resv' not described in 'ttm_bo_cleanup_refs'
 drivers/gpu/drm/ttm/ttm_bo.c:424: warning: Function parameter or member 'bdev' not described in 'ttm_bo_delayed_delete'
 drivers/gpu/drm/ttm/ttm_bo.c:424: warning: Function parameter or member 'remove_all' not described in 'ttm_bo_delayed_delete'
 drivers/gpu/drm/ttm/ttm_bo.c:635: warning: Function parameter or member 'bo' not described in 'ttm_bo_evict_swapout_allowable'
 drivers/gpu/drm/ttm/ttm_bo.c:635: warning: Function parameter or member 'ctx' not described in 'ttm_bo_evict_swapout_allowable'
 drivers/gpu/drm/ttm/ttm_bo.c:635: warning: Function parameter or member 'locked' not described in 'ttm_bo_evict_swapout_allowable'
 drivers/gpu/drm/ttm/ttm_bo.c:635: warning: Function parameter or member 'busy' not described in 'ttm_bo_evict_swapout_allowable'
 drivers/gpu/drm/ttm/ttm_bo.c:769: warning: Function parameter or member 'bo' not described in 'ttm_bo_add_move_fence'
 drivers/gpu/drm/ttm/ttm_bo.c:769: warning: Function parameter or member 'man' not described in 'ttm_bo_add_move_fence'
 drivers/gpu/drm/ttm/ttm_bo.c:769: warning: Function parameter or member 'mem' not described in 'ttm_bo_add_move_fence'
 drivers/gpu/drm/ttm/ttm_bo.c:769: warning: Function parameter or member 'no_wait_gpu' not described in 'ttm_bo_add_move_fence'
 drivers/gpu/drm/ttm/ttm_bo.c:806: warning: Function parameter or member 'bo' not described in 'ttm_bo_mem_force_space'
 drivers/gpu/drm/ttm/ttm_bo.c:806: warning: Function parameter or member 'place' not described in 'ttm_bo_mem_force_space'
 drivers/gpu/drm/ttm/ttm_bo.c:806: warning: Function parameter or member 'mem' not described in 'ttm_bo_mem_force_space'
 drivers/gpu/drm/ttm/ttm_bo.c:806: warning: Function parameter or member 'ctx' not described in 'ttm_bo_mem_force_space'
 drivers/gpu/drm/ttm/ttm_bo.c:872: warning: Function parameter or member 'bo' not described in 'ttm_bo_mem_space'
 drivers/gpu/drm/ttm/ttm_bo.c:872: warning: Function parameter or member 'placement' not described in 'ttm_bo_mem_space'
 drivers/gpu/drm/ttm/ttm_bo.c:872: warning: Function parameter or member 'mem' not described in 'ttm_bo_mem_space'
 drivers/gpu/drm/ttm/ttm_bo.c:872: warning: Function parameter or member 'ctx' not described in 'ttm_bo_mem_space'
 drivers/gpu/drm/ttm/ttm_bo.c:1387: warning: Function parameter or member 'ctx' not described in 'ttm_bo_swapout'
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201116174112.1833368-32-lee.jones@linaro.org

drivers/gpu/drm/ttm/ttm_bo.c

@@ -45,7 +45,7 @@
 
 static void ttm_bo_global_kobj_release(struct kobject *kobj);
 
-/**
+/*
  * ttm_global_mutex - protecting the global BO state
  */
 DEFINE_MUTEX(ttm_global_mutex);
@@ -278,7 +278,7 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 	return ret;
 }
 
-/**
+/*
  * Call bo::reserved.
  * Will release GPU memory type usage on destruction.
  * This is the place to put in driver specific hooks to release
@@ -352,9 +352,10 @@ static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
  * Must be called with lru_lock and reservation held, this function
  * will drop the lru lock and optionally the reservation lock before returning.
  *
- * @interruptible         Any sleeps should occur interruptibly.
- * @no_wait_gpu           Never wait for gpu. Return -EBUSY instead.
- * @unlock_resv           Unlock the reservation lock as well.
+ * @bo:                    The buffer object to clean-up
+ * @interruptible:         Any sleeps should occur interruptibly.
+ * @no_wait_gpu:           Never wait for gpu. Return -EBUSY instead.
+ * @unlock_resv:           Unlock the reservation lock as well.
  */
 
 static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
@@ -420,7 +421,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
 	return 0;
 }
 
-/**
+/*
  * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
  * encountered buffers.
  */
@@ -628,7 +629,7 @@ bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
 }
 EXPORT_SYMBOL(ttm_bo_eviction_valuable);
 
-/**
+/*
  * Check the target bo is allowable to be evicted or swapout, including cases:
  *
  * a. if share same reservation object with ctx->resv, have assumption
@@ -767,7 +768,7 @@ int ttm_mem_evict_first(struct ttm_bo_device *bdev,
 	return ret;
 }
 
-/**
+/*
  * Add the last move fence to the BO and reserve a new shared slot.
  */
 static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
@@ -803,7 +804,7 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
 	return 0;
 }
 
-/**
+/*
  * Repeatedly evict memory from the LRU for @mem_type until we create enough
  * space, or we've evicted everything and there isn't enough space.
  */
@@ -865,7 +866,7 @@ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo,
 	return 0;
 }
 
-/**
+/*
  * Creates space for memory region @mem according to its type.
  *
  * This function first searches for free space in compatible memory types in
@@ -1430,7 +1431,7 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
 }
 EXPORT_SYMBOL(ttm_bo_wait);
 
-/**
+/*
  * A buffer object shrink method that tries to swap out the first
  * buffer object on the bo_global::swap_lru list.
  */