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Date: Mon, 3 Nov 2014 22:10:39 +0000 From: "Elliott, Robert (Server Storage)" <Elliott@...com> To: "Kani, Toshimitsu" <toshi.kani@...com>, "hpa@...or.com" <hpa@...or.com>, "tglx@...utronix.de" <tglx@...utronix.de>, "mingo@...hat.com" <mingo@...hat.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "arnd@...db.de" <arnd@...db.de> CC: "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "jgross@...e.com" <jgross@...e.com>, "stefan.bader@...onical.com" <stefan.bader@...onical.com>, "luto@...capital.net" <luto@...capital.net>, "hmh@....eng.br" <hmh@....eng.br>, "yigal@...xistor.com" <yigal@...xistor.com>, "konrad.wilk@...cle.com" <konrad.wilk@...cle.com> Subject: RE: [PATCH v4 4/7] x86, mm, pat: Add pgprot_writethrough() for WT > -----Original Message----- > From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel- > owner@...r.kernel.org] On Behalf Of Kani, Toshimitsu > Sent: Monday, 27 October, 2014 5:56 PM > To: hpa@...or.com; tglx@...utronix.de; mingo@...hat.com; akpm@...ux- > foundation.org; arnd@...db.de > Cc: linux-mm@...ck.org; linux-kernel@...r.kernel.org; > jgross@...e.com; stefan.bader@...onical.com; luto@...capital.net; > hmh@....eng.br; yigal@...xistor.com; konrad.wilk@...cle.com; Kani, > Toshimitsu > Subject: [PATCH v4 4/7] x86, mm, pat: Add pgprot_writethrough() for > WT > > This patch adds pgprot_writethrough() for setting WT to a given > pgprot_t. > > Signed-off-by: Toshi Kani <toshi.kani@...com> > Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> ... > 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); > > +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 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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