commit 2793bba3988dea7dff9cf599da9864112fb1bbb3
author Jouni Hogander <jouni.hogander@unikie.com> Mon Dec 09 14:37:07 2019 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Thu Jan 23 08:19:37 2020 +0100
tree ff121cef28b78b1abb67c9fa108a371fc2e9b5c9
parent ae1d4e9157a719e348d5b29488d3c856cab848fb

MIPS: Prevent link failure with kcov instrumentation

[ Upstream commit a4a3893114a41e365274d5fab5d9ff5acc235ff0 ]

__sanitizer_cov_trace_pc() is not linked in and causing link
failure if KCOV_INSTRUMENT is enabled. Fix this by disabling
instrumentation for compressed image.

Signed-off-by: Jouni Hogander <jouni.hogander@unikie.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

arch/mips/boot/compressed/Makefile

diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index ad31c76..2f77e25 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -29,6 +29,9 @@
 	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
 	-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
 
+# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
+KCOV_INSTRUMENT		:= n
+
 # decompressor objects (linked with vmlinuz)
 vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o