Re: 64-bit jiffies, a better solution take 2

From: Daniel Jacobowitz (dan@debian.org)
Date: Sat May 11 2002 - 11:41:24 EST

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On Sat, May 11, 2002 at 08:01:34AM -0700, george anzinger wrote:
> Russell King wrote:
> >
> > On Fri, May 10, 2002 at 05:42:46PM -0700, george anzinger wrote:
> > > diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.14-org/arch/arm/vmlinux-armo.lds.in linux/arch/arm/vmlinux-armo.lds.in
> > > --- linux-2.5.14-org/arch/arm/vmlinux-armo.lds.in Tue May 7 15:59:35 2002
> > > +++ linux/arch/arm/vmlinux-armo.lds.in Fri May 10 17:07:31 2002
> > > @@ -4,6 +4,7 @@
> > > */
> > > OUTPUT_ARCH(arm)
> > > ENTRY(stext)
> > > +jiffies = jiffies_64 + 4;
> > > SECTIONS
> > > {
> > > . = TEXTADDR;
> > > diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.14-org/arch/arm/vmlinux-armv.lds.in linux/arch/arm/vmlinux-armv.lds.in
> > > --- linux-2.5.14-org/arch/arm/vmlinux-armv.lds.in Tue May 7 15:59:35 2002
> > > +++ linux/arch/arm/vmlinux-armv.lds.in Fri May 10 17:07:34 2002
> > > @@ -4,6 +4,7 @@
> > > */
> > > OUTPUT_ARCH(arm)
> > > ENTRY(stext)
> > > +jiffies = jiffies_64 + 4;
> > > SECTIONS
> > > {
> > > . = TEXTADDR;
> >
> > Eurgh. This seems to be a popular misconception. What makes you think
> > ARM is big endian, or was it just a guess?
> >
>
> >From byteorder.h:
>
> #ifdef __ARMEB__
> #include <linux/byteorder/big_endian.h>
> #else
> #include <linux/byteorder/little_endian.h>
> #endif
>
> So, yes, given no hints on who or what configures __ARMEB__. Is it always little endian?

The compiler does; that's true of most __*__ macros used in the kernel.
If you build a big-endian compiler, you'll get __ARMEB__.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer
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