Macros starting with `b' in sys

• B_ADAPTOR sys/reboot.h:67
• B_CONTROLLER sys/reboot.h:70
• binshash sys/buf.h:193
• binsheadfree sys/buf.h:207
• binstailfree sys/buf.h:213
• B_PARTITION sys/reboot.h:76
• bremfree sys/buf.h:203
• bremhash sys/buf.h:189
• btokmemx sys/malloc.h:223
• btokup sys/malloc.h:224
• B_TYPE sys/reboot.h:79
• BUCKETINDX sys/malloc.h:186
• BUFHASH sys/buf.h:123
• B_UNIT sys/reboot.h:73