[PATCH] [IA64] Include kexec.h in arch/ia64/kernel/process.c

[tony.luck at intel.com (Luck, Tony)]

> kexec.h is needed by arch/ia64/kernel/process.c so for the
> declaration of kexec_disable_iosapic() which is used in machine_shutdown().

> +#include <asm/kexec.h>

I merged this into your earlier change (moving machine_shutdown() into
process.c).  Linus pulled it last night.

I also added a "#ifdef CONFIG_KEXEC" around the call to kexec_disable_iosapic()
(because I first noticed that this was undefined when building non-KEXEC kernels).
But perhaps it might have been better to #define an empty stub for this function
inside kexec.h for the #ifndef CONFIG_KEXEC case?

-Tony