linux-kernel - Re: [PATCH] alpha: Wire up missing syscalls

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Message-ID: <BLU436-SMTP135C353F7438CDDA0249047B9DA0@phx.gbl>
Date:	Tue, 12 May 2015 19:40:36 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	Michael Cree <mcree@...on.net.nz>, rth@...ddle.net,
	ink@...assic.park.msu.ru,
	"mattst88@...il.com" <mattst88@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-alpha@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] alpha: Wire up missing syscalls

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/checksyscalls.sh
>>   <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;
                    ^

Thanks.
-- 
Chen Gang

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