Messages in this thread | | | Date | Thu, 17 Sep 2009 20:32:57 +0100 | From | Jamie Lokier <> | Subject | Re: [PATCH] arm: remove unused code in delay.S |
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Russell King - ARM Linux wrote: > On Tue, Sep 15, 2009 at 11:04:37PM +0200, Krzysztof Halasa wrote: > > Steve Chen <schen@mvista.com> writes: > > > > > +config OLD_CPU_DELAY > > > + depends on CPU_32v3 || CPU_32v4 || CPU_32v4T > > > + bool "Accurate delays" > > > + def_bool n > > > + help > > > + Enable if observing longer than expected delays and need more > > > + accuracy. This only applies to older CPUs. > > > + > > > > If it's that simple then why not enable the extra delay code > > unconditionally when compiling for those CPUs? > > Because it's really not that clear cut. Eg, ARM610 and ARM710 work > better with it, but StrongARM suffers from delays being too short. > Having a kernel configured for all those processors used to be common > (since the Acorn RiscPC had pluggable CPU cards, which could be one > of those processors.) > > It's really something that only experienced people should worry > about, and not Joe "kernel-builder" Bloggs.
I'm confused now. If I'm building a "generic" kernel to run on several different systems, including some ARM710s and some StrongARMs, do I include the code or not?
Btw, do you know where PT110 fits in? Is it like StrongARM (SA110)?
Thanks, -- Jamie
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