_outsb 202 arch/powerpc/include/asm/io.h extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count); _outsb 538 arch/powerpc/include/asm/io.h #define __do_writesb(a, b, n) _outsb(PCI_FIX_ADDR(a),(b),(n)) _outsb 56 arch/powerpc/kernel/io.c EXPORT_SYMBOL(_outsb);