linux-kernel - Re: [PATCH 1/8] signal/alpha: Document a conflict with SI

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Date:   Tue, 18 Jul 2017 08:37:36 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Michael Cree <mcree@...on.net.nz>
Cc:     Helge Deller <deller@....de>, linux-kernel@...r.kernel.org,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Oleg Nesterov <oleg@...hat.com>,
        Andrei Vagin <avagin@...tuozzo.com>,
        Thomas Gleixner <tglx@...utronix.de>, Greg KH <greg@...ah.com>,
        Andrey Vagin <avagin@...nvz.org>,
        Serge Hallyn <serge@...lyn.com>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Willy Tarreau <w@....eu>, linux-arch@...r.kernel.org,
        linux-api@...r.kernel.org,
        Linux Containers <containers@...ts.linux-foundation.org>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>, linux-alpha@...r.kernel.org
Subject: Re: [PATCH 1/8] signal/alpha: Document a conflict with SI_USER for SIGTRAP

Michael Cree <mcree@...on.net.nz> writes:

> On Fri, Jul 14, 2017 at 05:59:06AM -0500, Eric W. Biederman wrote:
>> in which cases the oddities will happen let alone test them.  Plus at
>> least for ia64 and alpha those architectures don't appear to be
>> receiving updates for new syscalls, and no new hardware is being built
>> so I don't know how much longer they will last.
>> 
>> That is building for alpha gives:
>> >   CALL    /home/eric/projects/linux/linux-exit-cleanups/scripts/checksyscalls.sh
>> > <stdin>:1239:2: warning: #warning syscall seccomp not implemented [-Wcpp]
>> > <stdin>:1248:2: warning: #warning syscall bpf not implemented [-Wcpp]
>> > <stdin>:1299:2: warning: #warning syscall userfaultfd not implemented [-Wcpp]
>> > <stdin>:1302:2: warning: #warning syscall membarrier not implemented [-Wcpp]
>> > <stdin>:1305:2: warning: #warning syscall mlock2 not implemented [-Wcpp]
>> > <stdin>:1308:2: warning: #warning syscall copy_file_range not implemented [-Wcpp]
>> > <stdin>:1311:2: warning: #warning syscall preadv2 not implemented [-Wcpp]
>> > <stdin>:1314:2: warning: #warning syscall pwritev2 not implemented [-Wcpp]
>> > <stdin>:1317:2: warning: #warning syscall pkey_mprotect not implemented [-Wcpp]
>> > <stdin>:1320:2: warning: #warning syscall pkey_alloc not implemented [-Wcpp]
>> > <stdin>:1323:2: warning: #warning syscall pkey_free not implemented [-Wcpp]
>> > <stdin>:1326:2: warning: #warning syscall statx not implemented [-Wcpp]
>
> Patches to wire up most of those syscalls on Alpha was posted recently
> along with others to fix module loading, etc., but unfortunately they
> do not appear to have been applied during the merge window...

Odd.

In general wiring up system calls is something that can even happen in
-rc2 or -rc3 as system calls get added in -rc1 and then the
architectures have a chance to send in the small patches wiring the up.
At least that is how I understand the usual rules for being a non-x86
architecture.

Eric