--- zzzz-none-000/linux-4.4.271/arch/x86/kernel/Makefile	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/arch/x86/kernel/Makefile	2023-04-19 10:22:28.000000000 +0000
@@ -20,6 +20,12 @@
 KASAN_SANITIZE_dumpstack.o := n
 KASAN_SANITIZE_dumpstack_$(BITS).o := n
 
+# If instrumentation of this dir is enabled, boot hangs during first second.
+# Probably could be more selective here, but note that files related to irqs,
+# boot, dumpstack/stacktrace, etc are either non-interesting or can lead to
+# non-deterministic coverage.
+KCOV_INSTRUMENT		:= n
+
 CFLAGS_irq.o := -I$(src)/../include/asm/trace
 
 obj-y			:= process_$(BITS).o signal.o