linux-kernel - Re: [RFC PATCH 03/14] sparc64: routines for basic mmu shared context structure management

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Date:   Sat, 17 Dec 2016 22:07:00 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     mike.kravetz@...cle.com
Cc:     sparclinux@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, bob.picco@...cle.com,
        nitin.m.gupta@...cle.com, vijay.ac.kumar@...cle.com,
        julian.calaby@...il.com, adam.buchbinder@...il.com,
        kirill.shutemov@...ux.intel.com, mhocko@...e.com,
        akpm@...ux-foundation.org
Subject: Re: [RFC PATCH 03/14] sparc64: routines for basic mmu shared
 context structure management

From: Mike Kravetz <mike.kravetz@...cle.com>
Date: Fri, 16 Dec 2016 10:35:26 -0800

> +void smp_flush_shared_tlb_mm(struct mm_struct *mm)
> +{
> +	u32 ctx = SHARED_CTX_HWBITS(mm->context);
> +
> +	(void)get_cpu();		/* prevent preemption */

preempt_disable();

> +
> +	smp_cross_call(&xcall_flush_tlb_mm, ctx, 0, 0);
> +	__flush_tlb_mm(ctx, SECONDARY_CONTEXT);
> +
> +	put_cpu();

preempt_enable();