linux-kernel - Re: Correct way to access the physmap? - Was: Re: [PATCH 7/9] Pmalloc Rare Write: modify selected pools

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Date:   Thu, 3 May 2018 14:55:23 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Igor Stoppa <igor.stoppa@...il.com>,
        Matthew Wilcox <willy@...radead.org>
Cc:     linux-security-module@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com,
        Igor Stoppa <igor.stoppa@...wei.com>
Subject: Re: Correct way to access the physmap? - Was: Re: [PATCH 7/9] Pmalloc
 Rare Write: modify selected pools

On 05/03/2018 02:52 PM, Igor Stoppa wrote:
> At the end of the summit, we agreed that I would go through the physmap.

Do you mean the kernel linear map?  That's just another name for the
virtual address that you get back from page_to_virt():

	int *j = page_to_virt(vmalloc_to_page(i));