커널 컴파일 오류 관련 문의

아래와 같이 cpufreq_setup 오류가 발생하는 데요 어디를 수정해야 하는지
알려주시면 감사하겠습니다...

커널 컴파일이 항상 다리를 잡네요 ^^;;;

cpufreq.c: In function `cpufreq_parse_policy':
cpufreq.c:111: warning: implicit declaration of function `sscanf_R859204af'
cpufreq.c: In function `cpufreq_proc_read':
cpufreq.c:225: warning: implicit declaration of function `sprintf_R1d26aa98'
cpufreq.c: In function `cpufreq_proc_init':
cpufreq.c:327: warning: implicit declaration of function `printk_R1b7d4074'
cpufreq.c: In function `cpufreq_restore':
cpufreq.c:1109: warning: implicit declaration of function `panic_R01075bf0'
cpufreq.c: At top level:
cpufreq.c:192: warning: `cpufreq_setup' defined but not used
make[1]: *** [cpufreq.o] 오류 1
make[1]: 나감 `/usr/src/linux-2.4.20-8/kernel' 디렉토
make: *** [_mod_kernel] 오류 2