x86/xen: panic on bad Xen-provided memory map
Panic if Xen provides a memory map with 0 entries. Although this is unlikely, it is better to catch the error at the point of seeing the map than later on as a symptom of some other crash. Signed-off-by: Martin Kelly <martkell@amazon.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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@ -595,6 +595,7 @@ char * __init xen_memory_setup(void)
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rc = 0;
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}
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BUG_ON(rc);
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BUG_ON(memmap.nr_entries == 0);
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/*
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* Xen won't allow a 1:1 mapping to be created to UNUSABLE
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