From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227vkypWSncAesbFii9DSfbUA1Jy0/48s/LX8Lxjur7BVqfv/0MzzmtfARVJTEPd5wDI87jB ARC-Seal: i=1; a=rsa-sha256; t=1517403953; cv=none; d=google.com; s=arc-20160816; b=ll40R7z9s2yMCguXl4RiNbPIboVsRKSf1KEk8AC17SCeIm3Ckm2ctsT0DfkG/3RRuq 6k/Gz2R7F8V7cWLwbTCOxdd3TKhHv5uzKqCN19rhW6RrC3KKgETD0G76+l3tloIzlESN dWbJE3KRdXLe7+w7WhB81C7dAqTFYrr6QLnj8HyGw/hYAp2ibXVZCpiDp8fMhKVsZMxH 887OYKl74a/Oe2XzTIlKbgrMYdfyOkaSiyAPgYntzOA7sbFTRJaLK/BObXgFjlzAleEO O0qrx60xpSP6opshSi5x9FrQLaggaRx2vBTwMo2ZdjS45Cpmp4429XgquBFqXuEpr9/c jvhg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:arc-authentication-results; bh=E08/cH7eMLxBjMQ4xCbvgfKptqaDffWxhMUvifs8TdA=; b=GBFnWrBZ1JWWX5uRX8eJLgtsnbnXKZ8qGI2Dy6/0doOov+NA+FMAuYdiJD6IHkLdFg wNNNMtCsQdUbtSxpYbMvCQSHn4zJZahwcOzDqU4+Avq4Wbl5XnoBalMk+X4ow3fudlnq MnBAmNvFDXSvMKn/QFLzbnXndo7UXbyGlzs12CoZgv8agWAVrTgBcby9RBZ0+5ahhA7c hchShaJNnyiSmQFuYcbXydqJ5to3M/ut7LsJme63RNowSURBEq6EHmAJVIbNRyV5tgq/ HuHqZYmwG/y9bc6muPKc8WdAkKE6SNdv6S9IyZjcB/LAOuFMhZQXfObtzxR5O0y4Hvr0 ofjA== ARC-Authentication-Results: i=1; mx.google.com; spf=neutral (google.com: 195.135.220.15 is neither permitted nor denied by best guess record for domain of mhocko@kernel.org) smtp.mailfrom=mhocko@kernel.org Authentication-Results: mx.google.com; spf=neutral (google.com: 195.135.220.15 is neither permitted nor denied by best guess record for domain of mhocko@kernel.org) smtp.mailfrom=mhocko@kernel.org Date: Wed, 31 Jan 2018 14:05:51 +0100 From: Michal Hocko To: miles.chen@mediatek.com Cc: Matthias Brugger , Andrew Morton , Huang Ying , Kate Stewart , Greg Kroah-Hartman , Thomas Gleixner , linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com Subject: Re: [PATCH] mm: Remove PG_highmem description Message-ID: <20180131130551.GS21609@dhcp22.suse.cz> References: <1517391212-2950-1-git-send-email-miles.chen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1517391212-2950-1-git-send-email-miles.chen@mediatek.com> User-Agent: Mutt/1.9.2 (2017-12-15) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1591100018913639992?= X-GMAIL-MSGID: =?utf-8?q?1591113367080323771?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed 31-01-18 17:33:32, miles.chen@mediatek.com wrote: > From: Miles Chen > > The commit cbe37d093707 ("[PATCH] mm: remove PG_highmem") has removed > PG_highmem to save a page flag. So the description of PG_highmem > is no longer needed, remove it. > > Signed-off-by: Miles Chen Acked-by: Michal Hocko > --- > include/linux/page-flags.h | 5 ----- > 1 file changed, 5 deletions(-) > > diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h > index 3ec44e27aa9d..50c2b8786831 100644 > --- a/include/linux/page-flags.h > +++ b/include/linux/page-flags.h > @@ -46,11 +46,6 @@ > * guarantees that this bit is cleared for a page when it first is entered into > * the page cache. > * > - * PG_highmem pages are not permanently mapped into the kernel virtual address > - * space, they need to be kmapped separately for doing IO on the pages. The > - * struct page (these bits with information) are always mapped into kernel > - * address space... > - * > * PG_hwpoison indicates that a page got corrupted in hardware and contains > * data with incorrect ECC bits that triggered a machine check. Accessing is > * not safe since it may cause another machine check. Don't touch! > -- > 2.12.5 > -- Michal Hocko SUSE Labs