BC_VFLUSH
if (ISSET(bp->b_cflags, BC_VFLUSH)) {
CLR(bp->b_cflags, BC_VFLUSH);
if (ISSET(bp->b_cflags, BC_VFLUSH) ||
ISSET(bp->b_cflags, BC_VFLUSH));
if (ISSET(bp->b_cflags, BC_VFLUSH)) {
CLR(bp->b_cflags, BC_VFLUSH);
brelsel(bp, BC_INVAL | BC_VFLUSH);
bp->b_cflags |= BC_BUSY | BC_VFLUSH;
brelsel(bp, BC_INVAL | BC_VFLUSH);
brelsel(bp, BC_INVAL | BC_VFLUSH);
brelsel(bp, BC_INVAL | BC_VFLUSH);
bp->b_cflags |= BC_BUSY | BC_VFLUSH;
brelse(bp, BC_INVAL | BC_VFLUSH);
brelsel(bp, BC_INVAL | BC_VFLUSH);
bp->b_cflags |= BC_BUSY | BC_VFLUSH;
brelsel(bp, BC_INVAL | BC_VFLUSH);
brelsel(bp, BC_INVAL | BC_VFLUSH);
0 : (BC_INVAL | BC_VFLUSH)));