On UP i386, when APIC is disabled
# CONFIG_X86_UP_APIC is not set
# CONFIG_PCI_IOAPIC is not set
code looking at apicdrivers never has any effect but it
still gets compiled in. In particular, this causes
build failures with kvm, but it generally bloats the kernel
Fix by defining both __apicdrivers and __apicdrivers_end
to be NULL when CONFIG_X86_LOCAL_APIC is unset: I verified
that as the result any loop scanning __apicdrivers gets optimized out by
Warning: a .config with apic disabled doesn't seem to boot
for me (even without this patch). Still verifying why,
meanwhile this patch is compile-tested only.
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Note: if this patch makes sense, can x86 maintainers
please ACK applying it through the kvm tree, since that is
where we see the issue that it addresses?
Avi, Marcelo, maybe you can carry this in kvm/linux-next as a temporary
measure so that linux-next builds?