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Date:   Fri, 21 Jul 2023 19:25:05 +0100
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Yicong Yang <yangyicong@huawei.com>
Cc:     akpm@linux-foundation.org, linux-mm@kvack.org,
        linux-arm-kernel@lists.infradead.org, x86@kernel.org,
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Subject: Re: [PATCH v11 4/4] arm64: support batched/deferred tlb shootdown
 during page reclamation/migration
Message-ID: <ZLrNgfDNyZGWx5bG@arm.com>
References: <20230717131004.12662-1-yangyicong@huawei.com>
 <20230717131004.12662-5-yangyicong@huawei.com>
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On Mon, Jul 17, 2023 at 09:10:04PM +0800, Yicong Yang wrote:
> +static inline void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *batch,
> +					     struct mm_struct *mm,
> +					     unsigned long uaddr)
> +{
> +	__flush_tlb_page_nosync(mm, uaddr);
> +}
> +
> +static inline void arch_flush_tlb_batched_pending(struct mm_struct *mm)
> +{
> +	dsb(ish);
> +}
> +
> +static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
> +{
> +	dsb(ish);
> +}

Nitpick: as an additional patch, I'd add some comment for these two
functions that the TLBI has already been issued and only a DSB is needed
to synchronise its effect on the other CPUs.

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