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From: Andy Lutomirski <luto@amacapital.net>
To: Sami Tolvanen <samitolvanen@google.com>
Cc: Andy Lutomirski <luto@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Kees Cook <keescook@chromium.org>, X86 ML <x86@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	will.deacon@arm.com
Subject: Re: [PATCH 3/4] x86: use the correct function type for sys_ni_syscall
Date: Fri, 13 Sep 2019 17:27:40 -0700
Message-ID: <9E76DD0A-7FB0-4BDB-A8B5-920265337ACB@amacapital.net> (raw)
In-Reply-To: <CABCJKud9ikdsfy9-bugbqKb-C7VXEEPJ_P1bO5KpGqv62Wuc7Q@mail.gmail.com>



> On Sep 13, 2019, at 4:26 PM, Sami Tolvanen <samitolvanen@google.com> wrote:
> 
>> On Fri, Sep 13, 2019 at 3:45 PM Andy Lutomirski <luto@kernel.org> wrote:
>> Should this be SYSCALL_DEFINE0?
> 
> It can be, and that would also fix the issue. However, it does result
> in unnecessary error injection to be hooked up here, which is why
> arm64 preferred to avoid the macro when I fixed it there. S390 uses
> SYSCALL_DEFINE0 for this though and since sys_ni_syscall always
> returns -ENOSYS, it shouldn't be a huge problem. Thoughts?
> 


I don’t see why all syscalls except these  few should have error injection hooked up.  It’s also IMO nicer from a maintenance perspective to have all syscalls use the same macros.

Will, is there something I’m missing?

  reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-13 21:00 [PATCH 0/4] x86: fix syscall function type mismatches Sami Tolvanen
2019-09-13 21:00 ` [PATCH 1/4] x86: use the correct function type in SYSCALL_DEFINE0 Sami Tolvanen
2019-09-13 22:33   ` Andy Lutomirski
2019-09-13 21:00 ` [PATCH 2/4] x86: use the correct function type for sys32_(rt_)sigreturn Sami Tolvanen
2019-09-13 22:44   ` Andy Lutomirski
2019-09-13 23:29     ` Sami Tolvanen
2019-09-13 21:00 ` [PATCH 3/4] x86: use the correct function type for sys_ni_syscall Sami Tolvanen
2019-09-13 22:45   ` Andy Lutomirski
2019-09-13 23:26     ` Sami Tolvanen
2019-09-14  0:27       ` Andy Lutomirski [this message]
2019-09-16 20:43         ` Will Deacon
2019-09-13 21:00 ` [PATCH 4/4] x86: fix function types in COND_SYSCALL Sami Tolvanen
2019-09-13 22:46   ` Andy Lutomirski
2019-09-13 23:28     ` Sami Tolvanen
2019-09-14  0:28       ` Andy Lutomirski
2019-09-17 22:44         ` Sami Tolvanen

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