linux-kernel - Re: [PATCH v3 3/9] x86/mm/tlb: Open-code on_each_cpu_cond_mask() for tlb_is_not

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Date:   Fri, 19 Jul 2019 11:36:50 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Nadav Amit <namit@...are.com>, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Rik van Riel <riel@...riel.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v3 3/9] x86/mm/tlb: Open-code on_each_cpu_cond_mask() for
 tlb_is_not_lazy()

On 7/18/19 5:58 PM, Nadav Amit wrote:
> @@ -865,7 +893,7 @@ void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
>  	if (cpumask_test_cpu(cpu, &batch->cpumask)) {
>  		lockdep_assert_irqs_enabled();
>  		local_irq_disable();
> -		flush_tlb_func_local(&full_flush_tlb_info);
> +		flush_tlb_func_local((void *)&full_flush_tlb_info);
>  		local_irq_enable();
>  	}

This looks like superfluous churn.  Is it?