Re: [RFC][PATCH 7/8] Convert sparc to use arch_getoffset()infrastructure.

[David Miller]

From: john stultz <johnstul@xxxxxxxxxx>
Date: Tue, 14 Apr 2009 18:51:26 -0700

> 	You acked this patch earlier, but I've just tried building with a
> cross-compiler environment I had access to and had problems getting it
> to build.
> 
> It seems the pci_do_get/settimeofday() and the bus_do_get/settimeofday()
> redirection code is causing some trouble. I'm really not sure how the
> BTFIXUPSET_CALL code works, so I don't want to just kill it off. 
> 
> Any advice here on how to do this right?

BTFIXUP is basically a kernel boot time patching service, but
it only works if we can declare function prototypes in the
sparc specific header files.

Since do_gettimeofday() doesn't fall into that requirement, the code
in pci_time_init() is patching the first two instructions of
do_gettimeofday() such that is makes a call to pci_do_gettimeofday().
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