v4.5-rc1 : arch/x86/kernel/hw_breakpoint.c:360:20: warning: ‘align’ may be used uninitialized

As a n00b I do wonder about he following warning:

CC arch/x86/kernel/hw_breakpoint.o
arch/x86/kernel/hw_breakpoint.c: In function ‘arch_validate_hwbkpt_settings’:
arch/x86/kernel/hw_breakpoint.c:360:20: warning: ‘align’ may be used uninitialized in this function [-Wmaybe-uninitialized]
if (info->address & align)

                    ^

at a 32 bit Gentoo KVM. Why isn't "align" set to some value in the "default:" branch of the switch above -or- why there is a "default:" there if it can't be reached ?

Toralf, pgp: C4EACDDE 0076E94E