D35798.diff
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	diff --git a/sys/conf/options.amd64 b/sys/conf/options.amd64
	--- a/sys/conf/options.amd64
	+++ b/sys/conf/options.amd64
	@@ -60,3 +60,6 @@

	# EFI Runtime services support
	EFIRT opt_efirt.h
	+
	+# Don't create a "legacy" PCI bridge if none is found.
	+NO_LEGACY_PCIB opt_cpu.h
	diff --git a/sys/conf/options.i386 b/sys/conf/options.i386
	--- a/sys/conf/options.i386
	+++ b/sys/conf/options.i386
	@@ -104,3 +104,6 @@

	# options for the Intel C600 SAS driver (isci)
	ISCI_LOGGING opt_isci.h
	+
	+# Don't create a "legacy" PCI bridge if none is found.
	+NO_LEGACY_PCIB opt_cpu.h
	diff --git a/sys/x86/pci/pci_bus.c b/sys/x86/pci/pci_bus.c
	--- a/sys/x86/pci/pci_bus.c
	+++ b/sys/x86/pci/pci_bus.c
	@@ -488,11 +488,13 @@
	* Note that pci_cfgregopen() thinks we have PCI devices..
	*/
	if (!found) {
	+#ifndef NO_LEGACY_PCIB
	if (bootverbose)
	printf(
	"legacy_pcib_identify: no bridge found, adding pcib0 anyway\n");
	child = BUS_ADD_CHILD(parent, 100, "pcib", 0);
	legacy_set_pcibus(child, 0);
	+#endif
	}
	}