linux-kernel - [patch] x86, xen: fix build dependency when USB

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Date:	Wed, 31 Oct 2012 22:42:30 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>
cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org
Subject: [patch] x86, xen: fix build dependency when USB_SUPPORT is not
 enabled

CONFIG_XEN_DOM0 must depend on CONFIG_USB_SUPPORT, otherwise there is no 
definition of xen_dbgp_reset_prep() and xen_dbgp_external_startup() 
resulting in the following link error:

drivers/built-in.o: In function `dbgp_reset_prep':
(.text+0x1e03c5): undefined reference to `xen_dbgp_reset_prep'
drivers/built-in.o: In function `dbgp_external_startup':
(.text+0x1e0d55): undefined reference to `xen_dbgp_external_startup'

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 arch/x86/xen/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -17,6 +17,7 @@ config XEN_DOM0
 	def_bool y
 	depends on XEN && PCI_XEN && SWIOTLB_XEN
 	depends on X86_LOCAL_APIC && X86_IO_APIC && ACPI && PCI
+	depends on USB_SUPPORT
 
 # Dummy symbol since people have come to rely on the PRIVILEGED_GUEST
 # name in tools.
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