Re: [PATCH] alpha: Wire up missing syscalls

From: Chen Gang
Date: Tue May 12 2015 - 07:40:50 EST

On 05/12/2015 04:59 PM, Michael Cree wrote:
> On Sun, May 10, 2015 at 02:33:36AM +0800, Chen Gang wrote:
>> The related warnings:
>> CALL scripts/
>> <stdin>:1238:2: warning: #warning syscall seccomp not implemented [-Wcpp]
>> <stdin>:1241:2: warning: #warning syscall getrandom not implemented [-Wcpp]
>> <stdin>:1244:2: warning: #warning syscall memfd_create not implemented [-Wcpp]
>> <stdin>:1247:2: warning: #warning syscall bpf not implemented [-Wcpp]
>> <stdin>:1250:2: warning: #warning syscall execveat not implemented [-Wcpp]
> Chen: Have you tested the syscalls you have wired up?

Sorry, no, I didn't.

> I have a suspicion that more is required to wire up the seccomp
> syscall. At least some of the other older architectures had to
> implement some extra arch dependent support to implement the seccomp
> syscall. I don't know whether this is necessary or not on Alpha so
> was wondering if this has been considered?

At present, I guess (I did not test), it will lead to sys_ni_call(), so
it is really only "wire up".

> Matt: are you still feeding Alpha patches to Linus? I suspect there
> might be a few other patches other than this one submitted to
> linux-alpha that should be applied.

I found another issue when building alpha, I guess, it is valuable to be
fixed (or there was already related patch but did not submitted?):

arch/alpha/kernel/osf_sys.c: In function ‘SyS_osf_settimeofday’:
arch/alpha/kernel/osf_sys.c:1028:14: warning: ‘kts.tv_nsec’ may be
used uninitialized in this function [-Wmaybe-uninitialized]
kts.tv_nsec *= 1000;
arch/alpha/kernel/osf_sys.c:1016:18: note: ‘kts’ was declared here
struct timespec kts;

Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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