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Date:   Fri, 28 Oct 2022 15:02:28 +0100
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc:     Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, x86@kernel.org,
        Kostya Serebryany <kcc@google.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Alexander Potapenko <glider@google.com>,
        Taras Madan <tarasmadan@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        "H . J . Lu" <hjl.tools@gmail.com>,
        Andi Kleen <ak@linux.intel.com>,
        Rick Edgecombe <rick.p.edgecombe@intel.com>,
        Bharata B Rao <bharata@amd.com>,
        Jacob Pan <jacob.jun.pan@linux.intel.com>,
        Ashok Raj <ashok.raj@intel.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        "David S. Miller" <davem@davemloft.net>,
        Will Deacon <will@kernel.org>
Subject: Re: [PATCHv11 09/16] mm: Expose untagging mask in /proc/$PID/status
Message-ID: <Y1vg9J9CtD9h5DCW@arm.com>
References: <20221025001722.17466-1-kirill.shutemov@linux.intel.com>
 <20221025001722.17466-10-kirill.shutemov@linux.intel.com>
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In-Reply-To: <20221025001722.17466-10-kirill.shutemov@linux.intel.com>
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On Tue, Oct 25, 2022 at 03:17:15AM +0300, Kirill A. Shutemov wrote:
> diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h
> index d3f8b5df0c1f..81ac12d69795 100644
> --- a/arch/arm64/include/asm/mmu_context.h
> +++ b/arch/arm64/include/asm/mmu_context.h
> @@ -278,6 +278,12 @@ void post_ttbr_update_workaround(void);
>  unsigned long arm64_mm_context_get(struct mm_struct *mm);
>  void arm64_mm_context_put(struct mm_struct *mm);
>  
> +#define mm_untag_mask mm_untag_mask
> +static inline unsigned long mm_untag_mask(struct mm_struct *mm)
> +{
> +	return -1UL >> 8;
> +}
> +
>  #include <asm-generic/mmu_context.h>

For arm64:

Acked-by: Catalin Marinas <catalin.marinas@arm.com>