For MIPS pre-boot, when CONFIG_KERNEL_ZSTD=y, the decompressor function uses __bswapdi2(), so this object file should be added to the target object file. Fixes these build errors: mips-linux-ld: arch/mips/boot/compressed/decompress.o: in function `xxh64': decompress.c:(.text+0x8be0): undefined reference to `__bswapdi2' mips-linux-ld: decompress.c:(.text+0x8c78): undefined reference to `__bswapdi2' mips-linux-ld: decompress.c:(.text+0x8d04): undefined reference to `__bswapdi2' mips-linux-ld: arch/mips/boot/compressed/decompress.o:decompress.c:(.text+0xa010): more undefined references to `__bswapdi2' follow Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> Cc: linux-mips@xxxxxxxxxxxxxxx --- arch/mips/boot/compressed/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) --- linux-next-20211109.orig/arch/mips/boot/compressed/Makefile +++ linux-next-20211109/arch/mips/boot/compressed/Makefile @@ -56,6 +56,8 @@ $(obj)/uart-ath79.c: $(srctree)/arch/mip vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o +vmlinuzobjs-$(CONFIG_KERNEL_ZSTD) += $(obj)/bswapdi.o + extra-y += ashldi3.c $(obj)/ashldi3.c: $(obj)/%.c: $(srctree)/lib/%.c FORCE $(call if_changed,shipped) @@ -64,6 +66,10 @@ extra-y += bswapsi.c $(obj)/bswapsi.c: $(obj)/%.c: $(srctree)/arch/mips/lib/%.c FORCE $(call if_changed,shipped) +extra-y += bswapdi.c +$(obj)/bswapdi.c: $(obj)/%.c: $(srctree)/arch/mips/lib/%.c FORCE + $(call if_changed,shipped) + targets := $(notdir $(vmlinuzobjs-y)) targets += vmlinux.bin
