@@ -217,6 +217,11 @@ KBUILD_CFLAGS += -fno-asynchronous-unwin
# Avoid indirect branches in kernel to deal with Spectre
ifdef CONFIG_RETPOLINE
KBUILD_CFLAGS += $(RETPOLINE_CFLAGS)
+ # Additionally, avoid generating expensive indirect jumps which
+ # are subject to retpolines for small number of switch cases.
+ # clang turns off jump table generation by default when under
+ # retpoline builds, however, gcc does not for x86.
+ KBUILD_CFLAGS += $(call cc-option,--param=case-values-threshold=20)
endif
archscripts: scripts_basic