my view about schedule( ) and system call , right or wrong ?

[lab liscs]

schedule( ) always runs in kernel space, therefore  the address of all
elements used by schedule() is not virtual address but physical
address.?
 
 
analogous question also appears in system call , when I define myself
syscall , for example:
 
asmlinkage long sys_check(a,b ,c){
 
        unsigned long buf;
 
        ...........
}
 
then , the buf is stored in kernel space , that is , physical address .
 
 
right or wrong
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