Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> writes:
+#else +#define generic_rtc_ops *(struct rtc_class_ops*)NULL +#endif static int __init generic_rtc_probe(struct platform_device *dev) { struct rtc_device *rtc; + const struct rtc_class_ops *ops; + + ops = dev_get_platdata(&dev->dev); + if (!ops) + ops = &generic_rtc_ops;I hope no compiler version treats "&*(struct rtc_class_ops*)NULL" as undefined behavior?
Yes, that is guaranteed, the operations cancel each other (6.5.3.2#3: If the operand is the result of a unary * operator, neither that operator nor the & operator is evaluated and the result is as if both were omitted). Andreas. -- Andreas Schwab, schwab@xxxxxxxxxxxxxx GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." -- To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
