add mutex_destroy()/down_read_trylock()

diff --git a/sys/dev/pci/drm/drm_linux.h b/sys/dev/pci/drm/drm_linux.h
index 0984e12..ecbf54a 100644 (file)
--- a/sys/dev/pci/drm/drm_linux.h
+++ b/sys/dev/pci/drm/drm_linux.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: drm_linux.h,v 1.76 2018/01/30 08:49:38 jsg Exp $      */
+/*     $OpenBSD: drm_linux.h,v 1.77 2018/01/30 08:50:59 jsg Exp $      */
 /*
  * Copyright (c) 2013, 2014, 2015 Mark Kettenis
  * Copyright (c) 2017 Martin Pieuchot
@@ -533,7 +533,9 @@ _spin_unlock_irqrestore(struct mutex *mtxp, __unused unsigned long flags
 #define mutex_trylock(rwl)             (rw_enter(rwl, RW_WRITE | RW_NOSLEEP) == 0)
 #define mutex_unlock(rwl)              rw_exit_write(rwl)
 #define mutex_is_locked(rwl)           (rw_status(rwl) == RW_WRITE)
+#define mutex_destroy(rwl)
 #define down_read(rwl)                 rw_enter_read(rwl)
+#define down_read_trylock(rwl)         (rw_enter(rwl, RW_READ | RW_NOSLEEP) == 0)
 #define up_read(rwl)                   rw_exit_read(rwl)
 #define down_write(rwl)                        rw_enter_write(rwl)
 #define up_write(rwl)                  rw_exit_write(rwl)