[PATCH] x86: don't allow KVM_CLOCK without HAVE_KVM

[Randy Dunlap <randy.dunlap@oracle.com>]

From: Randy Dunlap <randy.dunlap@oracle.com>

Make KVM_CLOCK depend on HAVE_KVM.  Otherwise a Voyager build can
fail with:

  CC      arch/x86/kernel/asm-offsets.s
In file included from include2/asm/irqflags.h:59,
                 from /local/linsrc/next-20080314/include/linux/irqflags.h:46,
                 from include2/asm/system.h:11,
                 from include2/asm/processor.h:21,
                 from include2/asm/atomic_32.h:5,
                 from include2/asm/atomic.h:2,
                 from /local/linsrc/next-20080314/include/linux/crypto.h:20,
                 from /local/linsrc/next-20080314/arch/x86/kernel/asm-offsets_32.c:7,
                 from /local/linsrc/next-20080314/arch/x86/kernel/asm-offsets.c:2:
include2/asm/paravirt.h: In function 'startup_ipi_hook':
include2/asm/paravirt.h:856: error: 'struct pv_apic_ops' has no member named 'startup_ipi_hook'
include2/asm/paravirt.h:856: error: 'struct pv_apic_ops' has no member named 'startup_ipi_hook'
include2/asm/paravirt.h:856: error: memory input 4 is not directly addressable
make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [sub-make] Error 2

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---
 arch/x86/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- next-20080314.orig/arch/x86/Kconfig
+++ next-20080314/arch/x86/Kconfig
@@ -370,6 +370,7 @@ config VMI
 config KVM_CLOCK
 	bool "KVM paravirtualized clock"
 	select PARAVIRT
+	depends on HAVE_KVM
 	help
 	  Turning on this option will allow you to run a paravirtualized clock
 	  when running over the KVM hypervisor. Instead of relying on a PIT

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