Android_Linux休眠唤醒

static ssize_t state_store()

{

suspend_state_t state = PM_SUSPEND_ON;

+-----------------------------------------------------------------------------------------

30 typedef int __bitwise suspend_state_t;

31

32 #define PM_SUSPEND_ON ((__force suspend_state_t) 0)

33 #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)

34 #define PM_SUSPEND_MEM ((__force suspend_state_t) 3)

35 #define PM_SUSPEND_MAX ((__force suspend_state_t) 4)

++-----------------------------------------------------------------------------------------

10 # define __force __attribute__((force));

//表示所定义的变量类型是可以做强制类型转换的，在进行Sparse分析的时候，是不用报告警信息的。

参考：(ZT)GNU C 的 __attribute__ 机制

参考：gcc中__attribute((force))是什么意思？

参考：__bitwise and __force

参考：bitwise in linux Kernel