So, in this function, we are using the back chain pointer, the link register save area, and one local variable.
所以，在这个函数中，我们使用了回链指针、链接寄存器保存区和一个本地变量。
2
But what I am saying is just take one of them, integrate, get an answer that involves function of the other variable, then differentiate that answer and compare and see what you get.
我要说的是取其一，积分得到包括另一变量的函数的结果，然后对结果求导，进行比较看得到什么。
3
One special function called atomic_add_negative is used to add to the atomic variable and then return true if the resulting value is negative.