Macros starting with `i' in bsd/kern

• ISALPHA bsd/kern/tty.c:160
• ISMAPFILEFLUSH bsd/kern/mapfs.h:115
• ISMAPPABLEFILE bsd/kern/mapfs.h:104
• ISMAPPEDFILE bsd/kern/mapfs.h:107
• ISRUN bsd/kern/tty.c:2352
• ISSET bsd/kern/mach_process.c:100