On Tue, Dec 09, 2014 at 08:18:53PM +0000, Stoidner, Christoph wrote:
>
> >> #ifndef DEFINE_SEMAPHORE
> >> /* Legacy DECLARE_MUTEX vanished in 2.6.37 */
> >> #define DEFINE_BINARY_SEMAPHORE(sem) DECLARE_MUTEX(sem)
> >> -#elif defined(CONFIG_PREEMPT_RT)
> >> -#define DEFINE_BINARY_SEMAPHORE(sem) DEFINE_SEMAPHORE(sem, 1)
> >> +#elif defined(CONFIG_PREEMPT_RT_FULL)
> >> +#define DEFINE_BINARY_SEMAPHORE(sem) DEFINE_SEMAPHORE(sem)
> >> #else
> >> #define DEFINE_BINARY_SEMAPHORE(sem) DEFINE_SEMAPHORE(sem)
> >> #endif
>
> > Why that change? I mean in 2.6.37, the define was CONFIG_PREEMPT_RT
> > anwyay.
>
> If DEFINE_SEMAPHORE is not defined we are below 2.6.37. So for 2.6.37 and
> above CONFIG_PREEMPT_RT was checked.
Well, are not we in the "elif" case of the #ifndef DEFINE_SEMAPHORE,
so DEFINE_SEMAPHORE is defined, or am I missing something ?
--
Gilles.
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