Some older GCC version (at least 4.6) emits calls to __bswapsi2() when building the XZ decompressor. The link of the compressed image then fails with the following error: arch/mips/boot/compressed/decompress.o: In function '__fswab32': include/uapi/linux/swab.h:60: undefined reference to '__bswapsi2' Add bswapsi.o to the link to fix the build with these versions. Signed-off-by: Alban Bedel <albeu@xxxxxxx> CC: stable@xxxxxxxxxxxxxxx # v4.4 --- Changelog: v2: * Added CC to stable as the patch hasn't been merged in 4.4 --- arch/mips/boot/compressed/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile index d5bdee1..45f8abb 100644 --- a/arch/mips/boot/compressed/Makefile +++ b/arch/mips/boot/compressed/Makefile @@ -41,7 +41,7 @@ vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY) += $(obj)/uart-alchemy.o endif ifdef CONFIG_KERNEL_XZ -vmlinuzobjs-y += $(obj)/../../lib/ashldi3.o +vmlinuzobjs-y += $(obj)/../../lib/ashldi3.o $(obj)/../../lib/bswapsi.o endif targets += vmlinux.bin -- 2.0.0
