Song Liu 75b2f7e4c9 x86/purgatory: Remove LTO flags ... -flto* implies -ffunction-sections. With LTO enabled, ld.lld generates multiple .text sections for purgatory.ro: $ readelf -S purgatory.ro | grep " .text" [ 1] .text PROGBITS 0000000000000000 00000040 [ 7] .text.purgatory PROGBITS 0000000000000000 000020e0 [ 9] .text.warn PROGBITS 0000000000000000 000021c0 [13] .text.sha256_upda PROGBITS 0000000000000000 000022f0 [15] .text.sha224_upda PROGBITS 0000000000000000 00002be0 [17] .text.sha256_fina PROGBITS 0000000000000000 00002bf0 [19] .text.sha224_fina PROGBITS 0000000000000000 00002cc0 This causes WARNING from kexec_purgatory_setup_sechdrs(): WARNING: CPU: 26 PID: 110894 at kernel/kexec_file.c:919 kexec_load_purgatory+0x37f/0x390 Fix this by disabling LTO for purgatory. [ AFAICT, x86 is the only arch that supports LTO and purgatory. ] We could also fix this with an explicit linker script to rejoin .text.* sections back into .text. However, given the benefit of LTOing purgatory is small, simply disable the production of more .text.* sections for now. Fixes: b33fff07e3 ("x86, build: allow LTO to be selected") Signed-off-by: Song Liu <song@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Link: https://lore.kernel.org/r/20230914170138.995606-1-song@kernel.org		2023-09-17 09:49:03 +02:00
..
.gitignore	x86/purgatory: Fail the build if purgatory.ro has missing symbols	2020-03-17 15:59:12 +01:00
entry64.S
kexec-purgatory.S	x86/purgatory: Omit use of bin2c	2022-07-25 10:32:32 +02:00
Makefile	x86/purgatory: Remove LTO flags	2023-09-17 09:49:03 +02:00
purgatory.c	x86/purgatory: Include header for warn() declaration	2023-08-03 16:37:18 +02:00
setup-x86_64.S
stack.S