Hi,

> > -#include <linux/rwlock_types.h>
> > +#include <linux/spinlock_types.h>
> 
> I think we can just remove the *_type.h include header completely.

I agree, spinlock.h is enough.

> For non-RT build, spinlock.h will include linux/rwlock.h, and
> spinlock_types.h unconditionally.

Yet, isn't it always included unconditionally?

spinlock.h -> spinlock_types.h -> rwlock_types.h

I don't see any conditionals there.

Thanks for the review and happy hacking,

   Wolfram