[lwip 2/2] Move and rename sys_arch_data_sync_barier()

[Sebastian Huber]

Hello Pavel,

On 18.03.23 01:04, Pavel Pisa wrote:
> As for
> 
> +static inline void
> +tms570_data_sync_barier(void)
> +{
> +#ifdef __arm__
> +  _ARM_Data_synchronization_barrier();
> +#endif
> +}
> 
> it is OK but may it be not ideal, because more drivers could require
> write buffers and instructions memory access order synchronization.
> We have added that definition to ports/os/rtems/arch/sys_arch.h
> 
> #ifndef __rtems__
> static inline sys_prot_t
> sys_arch_protect(void)
> {
>    sys_prot_t pval;
> 
>    rtems_interrupt_disable(pval);
>    return pval;
> }
> 
> static inline void
> sys_arch_unprotect(sys_prot_t pval)
> {
>    rtems_interrupt_enable(pval);
> }
> 
> static inline void
> sys_arch_data_sync_barier(void){
>    _ARM_Data_synchronization_barrier();
> }
> #else
> 
> as the generic solution when to allow same drivers to be used
> with different architectures. There can be more drivers requiring
> such protection.

ok, I will keep the sys_arch_data_sync_barier(). What I don't understand 
is why this stuff is under #ifndef __rtems__ (NOT defined __rtems__).

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