> -----Original Message----- > From: linux-kernel-owner@xxxxxxxxxxxxxxx [mailto:linux-kernel- > owner@xxxxxxxxxxxxxxx] On Behalf Of Kani, Toshimitsu > Sent: Monday, 27 October, 2014 5:56 PM > To: hpa@xxxxxxxxx; tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; akpm@linux- > foundation.org; arnd@xxxxxxxx > Cc: linux-mm@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > jgross@xxxxxxxx; stefan.bader@xxxxxxxxxxxxx; luto@xxxxxxxxxxxxxx; > hmh@xxxxxxxxxx; yigal@xxxxxxxxxxxxx; konrad.wilk@xxxxxxxxxx; 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@xxxxxx> > Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> ... > 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href