extern unsigned long va_shift; // Set in entry.S
// Defined in ldscript
-extern char _start, _data, _stack, _estack, _end, _iomem;
+extern char _start, _data, _stack, _estack, _fcstack, _efcstack, _end, _iomem;
// XXX check use and merge
#define phys_to_virt(phys) ((void *) ((unsigned long) (phys)))