Re: [patch 15/63] locking: Add base code for RT rw_semaphore and rwlock

[Thomas Gleixner]

On Wed, Aug 04 2021 at 15:37, Waiman Long wrote:
> On 7/30/21 9:50 AM, Thomas Gleixner wrote:
>> +static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
>> +				     unsigned int state)
>> +{
>> +	struct rt_mutex_base *rtm = &rwb->rtmutex;
>> +	unsigned long flags;
>> +
>> +	/* Take the rtmutex as a first step */
>> +	if (rwbase_rtmutex_lock_state(rtm, state))
>
> This function is used here before it was defined in next patch (patch 16).

Correct and there are more I think. But that's a hen and egg
problem:

The base code cannot be compiled without the actual implementation for
either rw_semaphore or rw_lock substitutions. The implementations cannot
be compiled without the base code.

So I chose to split it up so the base logic is separate.

Thanks,

        tglx