Prefer VERIFY0P(n) over VERIFY(n == NULL)

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #17591

module/os/linux/spl/spl-condvar.c

@@ -66,9 +66,9 @@ void
 __cv_init(kcondvar_t *cvp, char *name, kcv_type_t type, void *arg)
 {
 	ASSERT(cvp);
-	ASSERT(name == NULL);
+	ASSERT0P(name);
 	ASSERT(type == CV_DEFAULT);
-	ASSERT(arg == NULL);
+	ASSERT0P(arg);
 
 	cvp->cv_magic = CV_MAGIC;
 	init_waitqueue_head(&cvp->cv_event);
@@ -83,7 +83,7 @@ static int
 cv_destroy_wakeup(kcondvar_t *cvp)
 {
 	if (!atomic_read(&cvp->cv_waiters) && !atomic_read(&cvp->cv_refs)) {
-		ASSERT(cvp->cv_mutex == NULL);
+		ASSERT0P(cvp->cv_mutex);
 		ASSERT(!waitqueue_active(&cvp->cv_event));
 		return (1);
 	}

module/os/linux/spl/spl-kmem-cache.c

@@ -679,8 +679,8 @@ spl_kmem_cache_create(const char *name, size_t size, size_t align,
 	/*
 	 * Unsupported flags
 	 */
-	ASSERT(vmp == NULL);
-	ASSERT(reclaim == NULL);
+	ASSERT0P(vmp);
+	ASSERT0P(reclaim);
 
 	might_sleep();
 

module/os/linux/spl/spl-thread.c

@@ -80,7 +80,7 @@ __thread_create(caddr_t stk, size_t  stksize, thread_func_t func,
 
 	/* Option pp is simply ignored */
 	/* Variable stack size unsupported */
-	ASSERT(stk == NULL);
+	ASSERT0P(stk);
 
 	tp = kmem_alloc(sizeof (thread_priv_t), KM_PUSHPAGE);
 	if (tp == NULL)