D49273.diff
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	diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
	--- a/sys/kern/subr_bus.c
	+++ b/sys/kern/subr_bus.c
	@@ -1211,7 +1211,6 @@
	static int
	devclass_alloc_unit(devclass_t dc, device_t dev, int *unitp)
	{
	- device_t *devices;
	const char *s;
	int unit = *unitp;

	@@ -1268,11 +1267,8 @@
	int newsize;

	newsize = unit + 1;
	- devices = reallocf(dc->devices,
	- newsize * sizeof(*dc->devices), M_BUS, M_NOWAIT);
	- if (devices == NULL)
	- return (ENOMEM);
	- dc->devices = devices;
	+ dc->devices = reallocf(dc->devices,
	+ newsize * sizeof(*dc->devices), M_BUS, M_WAITOK);
	memset(dc->devices + dc->maxunit, 0,
	sizeof(device_t) * (newsize - dc->maxunit));
	dc->maxunit = newsize;