--- zzzz-none-000/linux-3.10.107/arch/xtensa/boot/lib/Makefile	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/xtensa/boot/lib/Makefile	2021-02-04 17:41:59.000000000 +0000
@@ -7,6 +7,13 @@
 lib-y	+= $(zlib:.c=.o) zmem.o
 
 ccflags-y	:= -Ilib/zlib_inflate
+ifdef CONFIG_FUNCTION_TRACER
+CFLAGS_REMOVE_inflate.o = -pg
+CFLAGS_REMOVE_zmem.o = -pg
+CFLAGS_REMOVE_inftrees.o = -pg
+CFLAGS_REMOVE_inffast.o = -pg
+endif
+
 
 quiet_cmd_copy_zlib = COPY    $@
       cmd_copy_zlib = cat $< > $@