B_MAGICMASK
if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
if ((bootdev & B_MAGICMASK) != B_DEVMAGIC)
if ((bootdev & B_MAGICMASK) != B_DEVMAGIC)
if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
if ((bootdev & B_MAGICMASK) == B_DEVMAGIC) {
if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)