linux-kernel - Re: [PATCH 2/4] debug-pagealloc: add support for highmem pages

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Message-ID: <CAC5umygVhjAAH-o_KGp+hkHeqfGpX9J+GP8aS68H_=GSLEdNWg@mail.gmail.com>
Date:	Wed, 24 Aug 2011 00:26:41 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 2/4] debug-pagealloc: add support for highmem pages

2011/8/23 Andrew Morton <akpm@...ux-foundation.org>:

> This seems more complicated than is needed.  Couldn't we just do
>
> static void poison_page(struct page *page)
> {
>        void *addr;
>
>        preempt_disable();
>        addr = kmap_atomic(page);
>        set_page_poison(page);
>        memset(addr, PAGE_POISON, PAGE_SIZE);
>        kunmap_atomic(addr);
>        preempt_enable();
> }
>
> ?

This code looks much better.  I'll update the patch.
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