This is a note to let you know that I've just added the patch titled
sh: define RUNTIME_DISCARD_EXIT
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sh-define-runtime_discard_exit.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From stable-owner@xxxxxxxxxxxxxxx Thu Mar 2 03:08:38 2023
From: Tom Saeger <tom.saeger@xxxxxxxxxx>
Date: Wed, 1 Mar 2023 19:04:56 -0700
Subject: sh: define RUNTIME_DISCARD_EXIT
To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Sasha Levin <sashal@xxxxxxxxxx>, Tom Saeger <tom.saeger@xxxxxxxxxx>, stable@xxxxxxxxxxxxxxx, John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>, Ard Biesheuvel <ardb@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Dennis Gilmore <dennis@xxxxxxxx>, Masahiro Yamada <masahiroy@xxxxxxxxxx>, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>, Nathan Chancellor <nathan@xxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxxx>, Rich Felker <dalias@xxxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Message-ID: <20230210-tsaeger-upstream-linux-5-10-y-v3-5-f7f1b9e2196c@xxxxxxxxxx>
From: Tom Saeger <tom.saeger@xxxxxxxxxx>
commit c1c551bebf928889e7a8fef7415b44f9a64975f4 upstream.
sh vmlinux fails to link with GNU ld < 2.40 (likely < 2.36) since
commit 99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv").
This is similar to fixes for powerpc and s390:
commit 4b9880dbf3bd ("powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT").
commit a494398bde27 ("s390: define RUNTIME_DISCARD_EXIT to fix link error
with GNU ld < 2.36").
$ sh4-linux-gnu-ld --version | head -n1
GNU ld (GNU Binutils for Debian) 2.35.2
$ make ARCH=sh CROSS_COMPILE=sh4-linux-gnu- microdev_defconfig
$ make ARCH=sh CROSS_COMPILE=sh4-linux-gnu-
`.exit.text' referenced in section `__bug_table' of crypto/algboss.o:
defined in discarded section `.exit.text' of crypto/algboss.o
`.exit.text' referenced in section `__bug_table' of
drivers/char/hw_random/core.o: defined in discarded section
`.exit.text' of drivers/char/hw_random/core.o
make[2]: *** [scripts/Makefile.vmlinux:34: vmlinux] Error 1
make[1]: *** [Makefile:1252: vmlinux] Error 2
arch/sh/kernel/vmlinux.lds.S keeps EXIT_TEXT:
/*
* .exit.text is discarded at runtime, not link time, to deal with
* references from __bug_table
*/
.exit.text : AT(ADDR(.exit.text)) { EXIT_TEXT }
However, EXIT_TEXT is thrown away by
DISCARD(include/asm-generic/vmlinux.lds.h) because
sh does not define RUNTIME_DISCARD_EXIT.
GNU ld 2.40 does not have this issue and builds fine.
This corresponds with Masahiro's comments in a494398bde27:
"Nathan [Chancellor] also found that binutils
commit 21401fc7bf67 ("Duplicate output sections in scripts") cured this
issue, so we cannot reproduce it with binutils 2.36+, but it is better
to not rely on it."
Link: https://lkml.kernel.org/r/9166a8abdc0f979e50377e61780a4bba1dfa2f52.1674518464.git.tom.saeger@xxxxxxxxxx
Fixes: 99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv")
Link: https://lore.kernel.org/all/Y7Jal56f6UBh1abE@dev-arch.thelio-3990X/
Link: https://lore.kernel.org/all/20230123194218.47ssfzhrpnv3xfez@xxxxxxxxxx/
Signed-off-by: Tom Saeger <tom.saeger@xxxxxxxxxx>
Tested-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dennis Gilmore <dennis@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Tom Saeger <tom.saeger@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sh/kernel/vmlinux.lds.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/sh/kernel/vmlinux.lds.S
+++ b/arch/sh/kernel/vmlinux.lds.S
@@ -4,6 +4,7 @@
* Written by Niibe Yutaka and Paul Mundt
*/
OUTPUT_ARCH(sh)
+#define RUNTIME_DISCARD_EXIT
#include <asm/thread_info.h>
#include <asm/cache.h>
#include <asm/vmlinux.lds.h>
Patches currently in stable-queue which might be from stable-owner@xxxxxxxxxxxxxxx are
queue-5.10/sched-fair-detect-capacity-inversion.patch
queue-5.10/powerpc-vmlinux.lds-don-t-discard-.rela-for-relocatable-builds.patch
queue-5.10/sched-uclamp-make-cpu_overutilized-use-util_fits_cpu.patch
queue-5.10/s390-define-runtime_discard_exit-to-fix-link-error-with-gnu-ld-2.36.patch
queue-5.10/powerpc-vmlinux.lds-define-runtime_discard_exit.patch
queue-5.10/sched-uclamp-make-select_idle_capacity-use-util_fits_cpu.patch
queue-5.10/sched-uclamp-fix-fits_capacity-check-in-feec.patch
queue-5.10/sched-fair-consider-capacity-inversion-in-util_fits_cpu.patch
queue-5.10/sh-define-runtime_discard_exit.patch
queue-5.10/sched-fair-fixes-for-capacity-inversion-detection.patch
queue-5.10/sched-uclamp-make-asym_fits_capacity-use-util_fits_cpu.patch
queue-5.10/sched-uclamp-fix-a-uninitialized-variable-warnings.patch
queue-5.10/sched-uclamp-make-task_fits_capacity-use-util_fits_cpu.patch
queue-5.10/arch-fix-broken-buildid-for-arm64-and-riscv.patch
queue-5.10/sched-uclamp-cater-for-uclamp-in-find_energy_efficient_cpu-s-early-exit-condition.patch
