[問題] wake_up_interruptible 是否要加lock
借一下這個連結的例子
http://bbs.chinaunix.net/forum.php?mod=viewthread&action=printable&tid=784492
{u32 i;
u16 *buff1;
u32 *buff2;
buff2=kmalloc(128,GFP_KERNEL);
wait_event_interruptible(wq,flags!=0);
..............................
}
在中断处理函数中
{
printk("interrupt 5 is working\n");
flags＝1;
wake_up_interruptible(&wq);
}
請問在這情況下 flag=1和wake_up_interruptible是否需要用spin lock包起來呢??
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