45 #include <sys/wscons.h>
  46 #include <sys/vt_impl.h>
  47 #include <sys/note.h>
  48 #include <sys/avl.h>
  49 
  50 /* set if console driver is attached */
  51 dev_info_t *wc_dip = NULL;
  52 /* active virtual console minor number */
  53 minor_t vc_active_console = VT_MINOR_INVALID;
  54 /*
  55  * console_user symbol link minor number.
  56  * VT_MINOR_INVALID     :       /dev/console
  57  *      N               :       /dev/vt/N
  58  */
  59 minor_t vc_cons_user = VT_MINOR_INVALID;
  60 /* vc_state_t AVL tree */
  61 avl_tree_t vc_avl_root;
  62 /* virtual console global lock */
  63 kmutex_t vc_lock;
  64 
  65 _NOTE(MUTEX_PROTECTS_DATA(vc_lock, wc_dip vc_avl_root vc_active_console
  66 vc_cons_user))
  67 
  68 /*
  69  * Called from vt devname part. Checks if dip is attached. If it is,
  70  * return its major number.
  71  */
  72 major_t
  73 vt_wc_attached(void)
  74 {
  75         major_t maj = (major_t)-1;
  76 
  77         mutex_enter(&vc_lock);
  78 
  79         if (wc_dip)
  80                 maj = ddi_driver_major(wc_dip);
  81 
  82         mutex_exit(&vc_lock);
  83 
  84         return (maj);
  85 }
  86 
  87 void

  45 #include <sys/wscons.h>
  46 #include <sys/vt_impl.h>
  47 #include <sys/note.h>
  48 #include <sys/avl.h>
  49 
  50 /* set if console driver is attached */
  51 dev_info_t *wc_dip = NULL;
  52 /* active virtual console minor number */
  53 minor_t vc_active_console = VT_MINOR_INVALID;
  54 /*
  55  * console_user symbol link minor number.
  56  * VT_MINOR_INVALID     :       /dev/console
  57  *      N               :       /dev/vt/N
  58  */
  59 minor_t vc_cons_user = VT_MINOR_INVALID;
  60 /* vc_state_t AVL tree */
  61 avl_tree_t vc_avl_root;
  62 /* virtual console global lock */
  63 kmutex_t vc_lock;
  64 



  65 /*
  66  * Called from vt devname part. Checks if dip is attached. If it is,
  67  * return its major number.
  68  */
  69 major_t
  70 vt_wc_attached(void)
  71 {
  72         major_t maj = (major_t)-1;
  73 
  74         mutex_enter(&vc_lock);
  75 
  76         if (wc_dip)
  77                 maj = ddi_driver_major(wc_dip);
  78 
  79         mutex_exit(&vc_lock);
  80 
  81         return (maj);
  82 }
  83 
  84 void