[tip regression] efi: Allow drivers to reserve boot services forever == toxic

[Mike Galbraith]

Hi Matt,

My workstation started instant rebooting with tip.  I bisected it to..

   efi/esrt: Use efi_mem_reserve() and avoid a kmalloc()

..but seems it's really $subject, as box works fine with the below.

---
 drivers/firmware/efi/efi.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -415,6 +415,7 @@ void __init efi_mem_reserve(phys_addr_t
 {
 	if (!memblock_is_region_reserved(addr, size))
 		memblock_reserve(addr, size);
+	else
 
 	/*
 	 * Some architectures (x86) reserve all boot services ranges


No idea what's going boom down in efi_arch_mem_reserve().