linux-kernel - Re: [tip: x86/mm] x86/mm: Randomize per-cpu entry area

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Date:   Fri, 21 Oct 2022 17:56:02 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Hillf Danton <hdanton@...a.com>,
        tip-bot2 for Peter Zijlstra <tip-bot2@...utronix.de>
Cc:     Seth Jenkins <sethjenkins@...gle.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Kees Cook <keescook@...omium.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [tip: x86/mm] x86/mm: Randomize per-cpu entry area

On 10/21/22 17:00, Hillf Danton wrote:
>> -#define CPU_ENTRY_AREA_MAP_SIZE		(CPU_ENTRY_AREA_PER_CPU + CPU_ENTRY_AREA_ARRAY_SIZE - CPU_ENTRY_AREA_BASE)
>> +#ifdef CONFIG_X86_32
>> +#define CPU_ENTRY_AREA_MAP_SIZE		(CPU_ENTRY_AREA_PER_CPU +		\
>> +					 (CPU_ENTRY_AREA_SIZE * NR_CPUS) -	\
>> +					 CPU_ENTRY_AREA_BASE
> My vi editor finds un-paired bracket here.
> Feel free to ignore it if nothing hurt.

Thanks for finding that!  Looks like Peter and I need to dust off our
32-bit .configs!

I just fixed the issue and pushed a new commit out to tip/x86/mm.