Something

root@slackware:/linux-2.6.20# bzip2 -dc 2.6.21-ragnarok3.bz2 | patch -p1
patching file arch/alpha/Kconfig
Hunk #1 succeeded at 598 (offset -4 lines).
patching file arch/alpha/kernel/traps.c
patching file arch/arm/Kconfig
Hunk #1 succeeded at 951 (offset -35 lines).
patching file arch/i386/boot/compressed/misc.c
patching file arch/i386/boot/video.S
Hunk #5 succeeded at 576 with fuzz 2.
Hunk #6 succeeded at 610 (offset -10 lines).
patching file arch/i386/defconfig
Hunk #1 succeeded at 205 with fuzz 1 (offset -9 lines).
patching file arch/i386/Kconfig
Hunk #1 succeeded at 518 (offset -28 lines).
Hunk #3 succeeded at 1038 (offset -27 lines).
patching file arch/i386/kernel/cpu/common.c
patching file arch/i386/kernel/cpu/cpufreq/Kconfig
Hunk #3 succeeded at 111 with fuzz 1.
Hunk #4 succeeded at 156 (offset 1 line).
patching file arch/i386/kernel/cpu/cpufreq/longhaul.c
Hunk #1 succeeded at 558 (offset -32 lines).
Hunk #2 FAILED at 586.
Hunk #3 FAILED at 601.
Hunk #4 FAILED at 613.
Hunk #5 FAILED at 651.
4 out of 5 hunks FAILED -- saving rejects to file arch/i386/kernel/cpu/cpufreq/longhaul.c.rej
patching file arch/i386/kernel/cpu/cpufreq/Makefile
Hunk #1 succeeded at 7 (offset -1 lines).
patching file arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
patching file arch/i386/kernel/cpu/cpufreq/powernow-k8.c
patching file arch/i386/kernel/cpu/cpufreq/powernow-k8.h
patching file arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
patching file arch/i386/kernel/cpu/Makefile
patching file arch/i386/kernel/cpu/mtrr/cyrix.c
patching file arch/i386/kernel/cpu/mtrr/main.c
patching file arch/i386/kernel/cpu/mtrr/Makefile
patching file arch/i386/kernel/cpu/proc.c
Hunk #1 succeeded at 154 (offset -4 lines).
patching file arch/i386/kernel/efi.c
patching file arch/i386/kernel/msr.c
Reversed (or previously applied) patch detected!  Assume -R? [n]