Use DISABLE_BRANCH_PROFILING for arch/mips/boot/compressed/decompress.o to prevent linkage errors. mips64-linux-ld: arch/mips/boot/compressed/decompress.o: in function `LZ4_decompress_fast_extDict': decompress.c:(.text+0x8c): undefined reference to `ftrace_likely_update' mips64-linux-ld: decompress.c:(.text+0xf4): undefined reference to `ftrace_likely_update' mips64-linux-ld: decompress.c:(.text+0x200): undefined reference to `ftrace_likely_update' mips64-linux-ld: decompress.c:(.text+0x230): undefined reference to `ftrace_likely_update' mips64-linux-ld: decompress.c:(.text+0x320): undefined reference to `ftrace_likely_update' mips64-linux-ld: arch/mips/boot/compressed/decompress.o:decompress.c:(.text+0x3f4): more undefined references to `ftrace_likely_update' follow Fixes: e76e1fdfa8f8 ("lib: add support for LZ4-compressed kernel") Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> Cc: linux-mips@xxxxxxxxxxxxxxx Cc: Kyungsik Lee <kyungsik.lee@xxxxxxx> --- arch/mips/boot/compressed/decompress.c | 2 ++ 1 file changed, 2 insertions(+) --- linux-next-20210701.orig/arch/mips/boot/compressed/decompress.c +++ linux-next-20210701/arch/mips/boot/compressed/decompress.c @@ -7,6 +7,8 @@ * Author: Wu Zhangjin <wuzhangjin@xxxxxxxxx> */ +#define DISABLE_BRANCH_PROFILING + #include <linux/types.h> #include <linux/kernel.h> #include <linux/string.h>