Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout regardless of the endian

[Peter Zijlstra]

On Thu, Jul 14, 2016 at 11:37:33AM +0200, Peter Zijlstra wrote:
> static inline u8 *__qspinlock_lock_byte(struct qspinlock *lock)
> {
> 	return (u8 *)lock + 3 * IS_BUILTIN(__BIG_ENDIAN);
> }

Bugger, that doesn't actually work. IS_BUILTIN expects the symbol to be
defined to "1" and __BIG_ENDIAN is not (its "4321").