In the latest efi tree, ce5e3f909fc0ed67e58367b9c56a54c20a51080b "efi/printf: Add 64-bit and 8-bit integer support", arch/x86/boot/compressed/vmlinux may have an undesired .discard.unreachable section from drivers/firmware/efi/libstub/vsprintf.stub.o .discard.unreachable contains an R_X86_64_PC32 relocation, which will be warned by LLD: a non-SHF_ALLOC section (.discard.unreachable) is not part of the memory image, thus conceptually the distance between a non-SHF_ALLOC and a SHF_ALLOC is not a constant which can be resolved at link time. % ld.lld -m elf_x86_64 -T arch/x86/boot/compressed/vmlinux.lds ... -o arch/x86/boot/compressed/vmlinux ld.lld: warning: vsprintf.c:(.discard.unreachable+0x0): has non-ABS relocation R_X86_64_PC32 against symbol '' Reuse the DISCARDS macro which includes .discard.* to drop .discard.unreachable Reported-by: kbuild test robot <lkp@xxxxxxxxx> Signed-off-by: Fangrui Song <maskray@xxxxxxxxxx> --- arch/x86/boot/compressed/vmlinux.lds.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 0dc5c2b9614b..8f1025d1f681 100644 --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -74,4 +74,6 @@ SECTIONS #endif . = ALIGN(PAGE_SIZE); /* keep ZO size page aligned */ _end = .; + + DISCARDS } -- 2.26.2.761.g0e0b3e54be-goog
