clang-tidy modernize-use-nullptr

src/drivers/device/ringbuffer.cpp

@@ -86,7 +86,7 @@ void
 RingBuffer::flush()
 {
 	while (!empty()) {
-		get(NULL);
+		get(nullptr);
 	}
 }
 
@@ -179,7 +179,7 @@ RingBuffer::force(const void *val, size_t val_size)
 			break;
 		}
 
-		get(NULL);
+		get(nullptr);
 		overwrote = true;
 	}
 
@@ -281,7 +281,7 @@ RingBuffer::get(void *val, size_t val_size)
 			next = _next(candidate);
 
 			/* go ahead and read from this index */
-			if (val != NULL) {
+			if (val != nullptr) {
 				memcpy(val, &_buf[candidate * _item_size], val_size);
 			}