thrsleep_unlock: check pointer against NULL

[Masato Asou]

ok?

Index: sys/kern/kern_synch.c
===================================================================
RCS file: /cvs/src/sys/kern/kern_synch.c,v
retrieving revision 1.155
diff -u -p -r1.155 kern_synch.c
--- sys/kern/kern_synch.c       30 Nov 2019 11:19:17 -0000      1.155
+++ sys/kern/kern_synch.c       4 Dec 2019 08:42:01 -0000
@@ -603,7 +603,7 @@ thrsleep_unlock(void *lock)
        static _atomic_lock_t unlocked = _ATOMIC_LOCK_UNLOCKED;
        _atomic_lock_t *atomiclock = lock;
 
-       if (!lock)
+       if (lock == NULL)
                return 0;
 
        return copyout(&unlocked, atomiclock, sizeof(unlocked));
--
ASOU Masato