ISO C90 forbids mixed declarations and code
把声明放到最前面
如:
myprintk("%s %s %d\n",__FILE__, __FUNCTION__,__LINE__);
int val;
copy_from_user(&val, buf,count);
应该为:
int val;
myprintk("%s %s %d\n",__FILE__, __FUNCTION__,__LINE__);
copy_from_user(&val, buf,count);
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