All symbols starting with `h' in kern

• h kern/syscalls.master:6
• hardclock kern/kern_clock.c:94
• HASH kern/kern_synch.c:239
• holdrele kern/vfs_subr.c:799
• hostid kern/kern_xxx.c:58
• how kern/kern_descrip.c:725
• hzto kern/kern_clock.c:438