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Date: Tue, 03 Oct 2006 14:37:25 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Andrew Morton <akpm@...l.org> Cc: Judith Lebzelter <judith@...l.org>, linuxppc-dev@...abs.org, Linux Kernel list <linux-kernel@...r.kernel.org>, Adrian Bunk <bunk@...sta.de> Subject: Re: [2.6 patch] mark virt_to_bus/bus_to_virt as __deprecated on i386 > > You might want to convince Andrew accepting my patch to make > > virt_to_bus/bus_to_virt give compile warnings on i386 for making > > people more aware of this problem... > >... Andrew, is there any reason not to take that patch ? > <-- snip --> > > > virt_to_bus/bus_to_virt are long deprecated, mark them as __deprecated > on i386. > > Without such warnings people will never update their code and fix > the errors in PPC64 builds. > > And yes, some of the drivers affected are maintained. > > This also catches accidential additions of users for these functions > like a usage of bus_to_virt() in the infiniband code that was added in > 2.6.17-rc1 (already removed). > > This patch increases the number of warnings shown during builds, but it > seems worth including it at least in -mm for making people aware of this > issue. > > Signed-off-by: Adrian Bunk <bunk@...sta.de> > > --- > > This patch was already sent on: > - 7 Jul 2006 > - 26 Jun 2006 > - 27 Apr 2006 > - 19 Apr 2006 > - 6 Jan 2006 > - 13 Dec 2005 > - 23 Nov 2005 > - 18 Nov 2005 > - 12 Nov 2005 > > --- linux-2.6.14-mm2-full/include/asm-i386/io.h.old 2005-11-12 01:44:38.000000000 +0100 > +++ linux-2.6.14-mm2-full/include/asm-i386/io.h 2005-11-12 01:45:58.000000000 +0100 > @@ -144,8 +144,14 @@ > * > * Allow them on x86 for legacy drivers, though. > */ > -#define virt_to_bus virt_to_phys > -#define bus_to_virt phys_to_virt > +static inline unsigned long __deprecated virt_to_bus(volatile void * address) > +{ > + return __pa(address); > +} > +static inline void * __deprecated bus_to_virt(unsigned long address) > +{ > + return __va(address); > +} > > /* > * readX/writeX() are used to access memory mapped devices. On some > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@...abs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev - 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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