linux-kernel - Re: [PATCH v4 1/3] ioremap: Update pgtable free interfaces with addr

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Message-ID: <1521586688.2693.231.camel@hpe.com>
Date:   Tue, 20 Mar 2018 22:58:18 +0000
From:   "Kani, Toshi" <toshi.kani@....com>
To:     "cpandya@...eaurora.org" <cpandya@...eaurora.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "takahiro.akashi@...aro.org" <takahiro.akashi@...aro.org>,
        "james.morse@....com" <james.morse@....com>,
        "kristina.martsenko@....com" <kristina.martsenko@....com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "marc.zyngier@....com" <marc.zyngier@....com>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: [PATCH v4 1/3] ioremap: Update pgtable free interfaces with addr

On Tue, 2018-03-20 at 17:15 +0530, Chintan Pandya wrote:
> This patch ("mm/vmalloc: Add interfaces to free unmapped
> page table") adds following 2 interfaces to free the page
> table in case we implement huge mapping.
> 
> pud_free_pmd_page() and pmd_free_pte_page()
> 
> Some architectures (like arm64) needs to do proper TLB
> maintanance after updating pagetable entry even in map.
> Why ? Read this,
> https://patchwork.kernel.org/patch/10134581/
> 
> Pass 'addr' in these interfaces so that proper TLB ops
> can be performed.
> 
> Signed-off-by: Chintan Pandya <cpandya@...eaurora.org>

Thanks for the update.  The change looks good.

Reviewed-by: Toshi Kani <toshi.kani@....com>

-Toshi