Magic numbers of the Linux reboot() system call

Question

The Linux Programming Interface has an exercise in Chapter 3 that goes like this:

When using the Linux-specific reboot() system call to reboot the s

Answer 1

It's the birthday of Linus Torvalds (The developer of the Linux kernel and the Git version control) and his 3 daughters. works as magic numbers to reboot the system.

http://en.wikipedia.org/wiki/Linus_Torvalds

Answer 2

Just a guess, but those numbers look more interesting in hex:

672274793 = 0x28121969
 85072278 = 0x05121996
369367448 = 0x16041998
537993216 = 0x20112000

Developers' or developers' children's birthdays?

Regarding finding the syscall implementation, I did a git grep -n LINUX_REBOOT_MAGIC2 and found the definition in kernel/sys.c. The symbol sys_reboot is generated by the SYSCALL_DEFINE4(reboot, ... gubbins, I suspect.