From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-f173.google.com (mail-ob0-f173.google.com [209.85.214.173]) by kanga.kvack.org (Postfix) with ESMTP id A96906B0038 for ; Mon, 3 Nov 2014 17:12:04 -0500 (EST) Received: by mail-ob0-f173.google.com with SMTP id wn1so9818994obc.18 for ; Mon, 03 Nov 2014 14:12:04 -0800 (PST) Received: from g4t3426.houston.hp.com (g4t3426.houston.hp.com. [15.201.208.54]) by mx.google.com with ESMTPS id qs7si19508959oeb.68.2014.11.03.14.12.02 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 03 Nov 2014 14:12:03 -0800 (PST) From: "Elliott, Robert (Server Storage)" Subject: RE: [PATCH v4 4/7] x86, mm, pat: Add pgprot_writethrough() for WT Date: Mon, 3 Nov 2014 22:10:39 +0000 Message-ID: <94D0CD8314A33A4D9D801C0FE68B4029593578ED@G9W0745.americas.hpqcorp.net> References: <1414450545-14028-1-git-send-email-toshi.kani@hp.com> <1414450545-14028-5-git-send-email-toshi.kani@hp.com> In-Reply-To: <1414450545-14028-5-git-send-email-toshi.kani@hp.com> Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: "Kani, Toshimitsu" , "hpa@zytor.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "akpm@linux-foundation.org" , "arnd@arndb.de" Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "jgross@suse.com" , "stefan.bader@canonical.com" , "luto@amacapital.net" , "hmh@hmh.eng.br" , "yigal@plexistor.com" , "konrad.wilk@oracle.com" > -----Original Message----- > From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel- > owner@vger.kernel.org] On Behalf Of Kani, Toshimitsu > Sent: Monday, 27 October, 2014 5:56 PM > To: hpa@zytor.com; tglx@linutronix.de; mingo@redhat.com; akpm@linux- > foundation.org; arnd@arndb.de > Cc: linux-mm@kvack.org; linux-kernel@vger.kernel.org; > jgross@suse.com; stefan.bader@canonical.com; luto@amacapital.net; > hmh@hmh.eng.br; yigal@plexistor.com; konrad.wilk@oracle.com; Kani, > Toshimitsu > Subject: [PATCH v4 4/7] x86, mm, pat: Add pgprot_writethrough() for > WT >=20 > This patch adds pgprot_writethrough() for setting WT to a given > pgprot_t. >=20 > Signed-off-by: Toshi Kani > Reviewed-by: Konrad Rzeszutek Wilk ... > diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c > index a214f5a..a0264d3 100644 > --- a/arch/x86/mm/pat.c > +++ b/arch/x86/mm/pat.c > @@ -896,6 +896,16 @@ pgprot_t pgprot_writecombine(pgprot_t prot) > } > EXPORT_SYMBOL_GPL(pgprot_writecombine); >=20 > +pgprot_t pgprot_writethrough(pgprot_t prot) > +{ > + if (pat_enabled) > + return __pgprot(pgprot_val(prot) | > + cachemode2protval(_PAGE_CACHE_MODE_WT)); > + else > + return pgprot_noncached(prot); > +} > +EXPORT_SYMBOL_GPL(pgprot_writethrough); ... Would you be willing to use EXPORT_SYMBOL for the new=20 pgprot_writethrough function to provide more flexibility for modules to utilize the new feature? In x86/mm, 18 of 60 current exports are GPL and 42 are not GPL. --- Rob Elliott HP Server Storage -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org