摘要：
jiffies的定义:// include/linux/jiffies.h
extern u64 __jiffy_data jiffies_64;
extern unsigned long volatile __jiffy_data jiffies;Gcc defines __ARMEB__ for big-endian ARM and __ARMEL__ forlittle-endian ARM.以小端为例，arch/arm/kernel/vmlinux.lds 中将jiffies定义为jiffies_64的低4位。以arm平台为例，jiffies变量是unsigned long类型的，那么 阅读全文
