Hi to all,
we are trying to patch the Linux Kernel Linux4SAM for AT91SAM9260EK with the Real time patch.

We have problems both with Kernel 2.6.23 and 2.6.22

Kernel 2.6.23 building after succesfull patching
kernel/built-in.o: In function `setup_preempt_thresh':
utsname_sysctl.c:(.text+0x2aaf8): undefined reference to `usecs_to_cycles'
make: *** [.tmp_vmlinux1] Error 1

Kernel 2.6.22 patching with ketchup
>>ketchup --no-gpg 2.6.22.1-rt9-broken-out.tar
Error :
patching file kernel/softirq.c
Hunk #1 FAILED at 303.
1 out of 1 hunk FAILED -- saving rejects to file kernel/softirq.c.rej


Any suggestion?

Antonio