linux-kernel - Re: [RFC PATCH] powerpc: Wire up three syscalls

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Message-ID: <CAJhHMCDaSAzU3zvhY2FRFoBaQH4oQBTsUsYMU6pvBbCXydROZQ@mail.gmail.com>
Date:	Sun, 31 Aug 2014 08:52:04 -0400
From:	Pranith Kumar <bobby.prani@...il.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Anton Blanchard <anton@...ba.org>,
	Fabian Frederick <fabf@...net.be>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"open list:LINUX FOR POWERPC..." <linuxppc-dev@...ts.ozlabs.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] powerpc: Wire up three syscalls

Hi Geert,

On Sun, Aug 31, 2014 at 4:53 AM, Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
> Hi Pranith,
>
> On Sat, Aug 30, 2014 at 5:36 AM, Pranith Kumar <bobby.prani@...il.com> wrote:
>> I see that the three syscalls seccomp, getrandom and memfd_create are not wired
>> because of which we get a warning while compilation.
>>
>> So I wired them up in this patch. What else needs to be done? I tried the
>> memfd_test after compiling this kernel, but it is failing. What am I missing for
>> this to work? Any advice is really appreciated! :)
>
> Did it fail due to the (silly) "ifeq ($(ARCH),X86)" checks in
> tools/testing/selftests/memfd/Makefile?
>

I removed that check and compiled memfd_test.c by hand. This is the
following error which I get when I run the test:

$ ./memfd_test
memfd: CREATE
memfd: BASIC
10 != 0 = GET_SEALS(3)
Aborted

This is basically when checking the seals which we already added. It
should return 10 (F_SEAL_SHRINK | F_SEAL_WRITE), instead it is returning 0.

What else needs to be done for this to properly work? I see that for
m68k, you just wired it up like in this patch. Did it work after that?

-- 
Pranith
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