Messages in this thread | | | Date | Wed, 26 Sep 2007 16:53:14 -0400 | From | Dave Jones <> | Subject | Re: [PATCH 1/1] Kernel compile bug in 2.6.22.6/7 {maybe more} ARM/StrongARM |
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On Tue, Sep 25, 2007 at 10:36:51AM -0400, Dave Jones wrote: > On Tue, Sep 25, 2007 at 08:31:32AM +0100, Russell King wrote: > > On Mon, Sep 24, 2007 at 05:53:57PM -0500, Greg.Chandler@wellsfargo.com wrote: > > > I was building a kernel for an iPaq {SA1110} and ran into this. > > > > > > linux-2.6.22.7/arch/arm/mach-sa1100/generic.c: > > > Has a: #include <linux/cpufreq.h> > > > Then afterwards there is a: #if defined(CONFIG_CPU_FREQ_SA1100) || > > > defined(CONFIG_CPU_FREQ_SA1110) > > > who's else section redefines the cpufreq_get function inhereited from > > > the header.... > > > > > > I'm guessing no one ever ended up in the "else" section until now, and > > > that the header was added some time ago and no one caught this. > > > This patch worked for me to get rid of the compile time problems. I'm > > > having issues with the kernel, but as far as I can tell they are form > > > the Frame buffer and not because of this. If this assessment is correct > > > {the not needing this code anymore} then please pass this along so it > > > makes it into an upcoming release. > > > > > > --- linux-2.6.22.7/arch/arm/mach-sa1100/generic.c.orig 2007-09-24 > > > 17:36:21.000000000 -0500 > > > +++ linux-2.6.22.7/arch/arm/mach-sa1100/generic.c 2007-09-24 > > > 17:40:02.000000000 -0500 > > > @@ -107,15 +107,6 @@ unsigned int sa11x0_getspeed(unsigned in > > > return cclk_frequency_100khz[PPCR & 0xf] * 100; > > > } > > > > > > -#else > > > -/* > > > - * We still need to provide this so building without cpufreq works. > > > - */ > > > -unsigned int cpufreq_get(unsigned int cpu) > > > -{ > > > - return cclk_frequency_100khz[PPCR & 0xf] * 100; > > > -} > > > -EXPORT_SYMBOL(cpufreq_get); > > > #endif > > > > > > /* > > > > No. That code is required - the StrongARM 1100 framebuffer driver > > *needs* to know what the CPU frequency is so it can set the pixel > > clock divisor. > > > > The real problem is the silly people who added this to cpufreq.h: > > > > #ifdef CONFIG_CPU_FREQ > > unsigned int cpufreq_quick_get(unsigned int cpu); > > unsigned int cpufreq_get(unsigned int cpu); > > #else > > static inline unsigned int cpufreq_quick_get(unsigned int cpu) > > { > > return 0; > > } > > static inline unsigned int cpufreq_get(unsigned int cpu) > > { > > return 0; > > } > > #endif > > > > which utterly bogus. > > Which came from ... > > commit 184c44d2049c4db7ef6ec65794546954da2c6a0e > Author: Andrew Morton <akpm@linux-foundation.org> > Date: Wed May 2 19:27:08 2007 +0200 > > [PATCH] x86-64: fix x86_64-mm-sched-clock-share > > Fix for the following patch. Provide dummy cpufreq functions when > CPUFREQ is not compiled in. > > Cc: Andi Kleen <ak@suse.de> > Cc: Dave Jones <davej@codemonkey.org.uk> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > Signed-off-by: Andi Kleen <ak@suse.de> >
Following up on this from yesterday, Linus please revert the above cset. It doesn't seem to be necessary (it was added to fix a miscompile in 'make allnoconfig' which doesn't seem to be repeatable with it reverted) and actively breaks the ARM SA1100 framebuffer driver.
(If you'd prefer a patch reverting it, I'll send one, but I'm hoping that git-revert will just dtrt).
Thanks,
Dave
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