大师指点后，所做的笔记，很感谢一起愿意研究技术的同事，以下不是本人原创，是他分析的成果 #include 
     
      #include 
      
       struct lock_class_key {    int ck;};#define mutex_init()                    \do {                                    \    static struct lock_class_key __key;    \    static int a; \                                    \    printf("macro==>>Line=%d,&__key=0x%p &a=0x%p\n", __LINE__, &__key, &a);        \} while (0)void __mutex_init(){    do {        static struct lock_class_key __key1;        static int a1;        printf("function==>>Line=%d,&__key1=0x%p &a1=0x%p\n", __LINE__, &__key1, &a1);    } while (0);    }int main(void){//do { static struct lock_class_key __key; static int a; printf("macro==>>Line=%d,&__key=0x%p &a=0x%p\n", 28, &__key, &a); } while (0);===>宏展开就是这样的,gcc -E -o test.i test.c//do { static struct lock_class_key __key; static int a; printf("macro==>>Line=%d,&__key=0x%p &a=0x%p\n", 29, &__key, &a); } while (0);//{ static struct lock_class_key __key; static int a; printf("macro==>>Line=%d,&__key=0x%p &a=0x%p\n", 28, &__key, &a); }//{ static struct lock_class_key __key; static int a; printf("macro==>>Line=%d,&__key=0x%p &a=0x%p\n", 29, &__key, &a); }    {
    static int b1;} //=======>这种括号是作用域，一个函数名本来只有一个作用域，但是如果函数里面加了这种，相当于是在两个作用域里面，是允许这样定义的，地址也会不同//printf("fuck!!\n");    {
   static int b1;}    mutex_init();    mutex_init();    __mutex_init();    __mutex_init();        return (0);}执行结果：macro==>>Line=37,&__key=0x0x60104c &a=0x0x601050macro==>>Line=38,&__key=0x0x601054 &a=0x0x601058function==>>Line=21,&__key1=0x0x601044 &a1=0x0x601048function==>>Line=21,&__key1=0x0x601044 &a1=0x0x601048