BYTE_REG_BITS_SET  499 drivers/net/ethernet/via/via-rhine.c #define BYTE_REG_BITS_SET(x, m, p)   do { iowrite8((ioread8((p)) & (~(m)))|(x), (p)); } while (0)
BYTE_REG_BITS_SET   47 drivers/net/ethernet/via/via-velocity.h #define BYTE_REG_BITS_SET(x,m,p)    do { writeb( (readb((p)) & (~(m))) |(x),(p));} while (0)