linux-kernel - Re: [PATCH bpf 1/3] x86/mm: Move is_vsyscall_vaddr() into mm

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Message-ID: <979ee85e-6f36-fa9c-847f-a9be1b92063f@huaweicloud.com>
Date: Sat, 20 Jan 2024 09:29:47 +0800
From: Hou Tao <houtao@...weicloud.com>
To: Sohil Mehta <sohil.mehta@...el.com>, x86@...nel.org, bpf@...r.kernel.org
Cc: Dave Hansen <dave.hansen@...ux.intel.com>,
 Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, "H . Peter Anvin" <hpa@...or.com>,
 linux-kernel@...r.kernel.org, xingwei lee <xrivendell7@...il.com>,
 Jann Horn <jannh@...gle.com>, houtao1@...wei.com
Subject: Re: [PATCH bpf 1/3] x86/mm: Move is_vsyscall_vaddr() into
 mm_internal.h

Hi,

On 1/20/2024 8:35 AM, Sohil Mehta wrote:
> On 1/18/2024 11:30 PM, Hou Tao wrote:
>> From: Hou Tao <houtao1@...wei.com>
>>
>> Moving is_vsyscall_vaddr() into mm_internal.h to make it available for
>> copy_from_kernel_nofault_allowed() in arch/x86/mm/maccess.c.
>>
> Instead of mm_internal.h would a better place for is_vsyscall_vaddr() be
> arch/x86/include/asm/vsyscall.h?

Yes, asm/vsyscall.h is better indeed. Will update in v2. Thanks for the
suggestion.
>
> Sohil
>
> .