[PATCH] microblaze: Use the correct select syscall (BZ #28883)

[Mark Hatle]

The other option would be to remove the non-__assume_pselect path, and simply 
require all systems to have pselect.  (This would require microblaze to move to 
kernel 3.15 minimum, which may be reasonable behavior.)

(It has been a long time since Xilinx has shipped a kernel older then 3.15, so 
it would be down to specific users trying to hold onto an older kernel.)

--Mark

On 2/16/22 9:15 AM, Andreas Schwab wrote:
> On Feb 16 2022, Adhemerval Zanella via Libc-alpha wrote:
> 
>> On Microblaze only __NR_newselect is implemented, even though kernel
>> advertise __NR_select on asm/unistd.h.  Instead of adding an ad-hoc
>> logic on select.c, change the __NR_select of microblaze by overwritting
>> with fixup-asm-unistd.h.
> 
> Microblaze is the only architecture that undefines __ASSUME_PSELECT (for
> very old kernels), so it is the only one to actually trigger that
> fallback in select.c.  I think that fallback could just be changed to
> use _newselect instead.
>