WORD_REG_BITS_OFF  496 drivers/net/ethernet/via/via-rhine.c #define WORD_REG_BITS_OFF(x, p)     do { iowrite16(ioread16((p)) & (~(x)), (p)); } while (0)
WORD_REG_BITS_OFF   44 drivers/net/ethernet/via/via-velocity.h #define WORD_REG_BITS_OFF(x,p)      do { writew(readw((p)) & (~(x)),(p));} while (0)