The PCI Write Barrier instruction ignores the registers encoded in it.
There is thus no need to explicitly set the register to zero or to
associate it with a variable at all. In the resulting binary this removes
an unnecessary lghi and it makes the code simpler.
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
static inline void __pciwb_mio(void)
{
- unsigned long unused = 0;
-
- asm volatile (".insn rre,0xb9d50000,%[op],%[op]\n"
- : [op] "+d" (unused));
+ asm volatile (".insn rre,0xb9d50000,0,0\n");
}
void zpci_barrier(void)