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

David Miller
2009-04-15T02:51:53Z

From: john stultz <johnstul@us.ibm.com>
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().