No more calls.S. It becomes simpler to add a new syscall.

1. kernel/include/linux/syscalls.h
   Define the syscall:
   asmlinkage long sys_hong(int k);
2. implement it somewere.c
3. kernel/include/uapi/asm-generic/unistd.h
   Link the syscall with a number. Don’t forget update __NR_syscalls accordingly.
   e.g.,
   #define __NR_hong 291
   __SYSCALL(__NR_hong, sys_hong)
   #define __NR_syscalls 292

http://www.ibm.com/developerworks/library/?sort_by=&show_abstract=true&show_all=&search_flag=&contentarea_by=All+Zones&search_by=kernel+api&product_by=-1&topic_by=-1&industry_by=-1&type_by=All+Types&ibm-search=Search

echo 3 > /proc/sys/kernel/printk
The number, 3, can be changed.

/dev/cpuctl –> /apps –> /bg_non_interactive

echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq

echo 0 > /sys/devices/system/cpu/cpu1/online

Where, ‘cpu1’ can be replaced with ‘cpu0’.