>>On Wed, Nov 8, 2017 at 6:55 AM, Greentime Hu <green.hu@xxxxxxxxx> wrote:
>> +
>> +static inline void __delay(unsigned long loops) {
>> + __asm__ __volatile__(".align 2\n"
>> + "1:\n"
>> + "\taddi\t%0, %0, -1\n"
>> + "\tbgtz\t%0, 1b\n"
>> + :"=r"(loops)
>> + :"0"(loops)); }
>
> Does the architecture define a high-resolution clock source? If yes, then it's better to use that to get exact timing than to rely on the loop calibration.
>
Dear Arnd:
Thanks.
I will modify it in the next version patch.
>> +/*
>> + * This file is generally used by user-level software, so you need to
>> + * be a little careful about namespace pollution etc. Also, we
>> +cannot
>> + * assume GCC is being used.
>> + */
>> +
>> +typedef unsigned short __kernel_mode_t; #define __kernel_mode_t
>> +__kernel_mode_t
>> +
>> +typedef unsigned short __kernel_ipc_pid_t; #define __kernel_ipc_pid_t
>> +__kernel_ipc_pid_t
>> +
>> +typedef unsigned short __kernel_uid_t; typedef unsigned short
>> +__kernel_gid_t; #define __kernel_uid_t __kernel_uid_t
>> +
>> +typedef unsigned short __kernel_old_dev_t; #define __kernel_old_dev_t
>> +__kernel_old_dev_t
>> +
>> +#include <asm-generic/posix_types.h>
>
> I don't understand why you would want to override any of those.
> Changing them unfortunately means rebuilding all of your user space, but I think it would be better to do that now than to suffer from this later on.
>
> Arnd
Thanks.
I will remove them in the next version patch.
Best regards
Vincent
