The patch titled
Subject: kexec: drop dependency on ARCH_SUPPORTS_KEXEC from CRASH_DUMP
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
kexec-drop-dependency-on-arch_supports_kexec-from-crash_dump.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kexec-drop-dependency-on-arch_supports_kexec-from-crash_dump.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Ignat Korchagin <ignat@xxxxxxxxxxxxxx>
Subject: kexec: drop dependency on ARCH_SUPPORTS_KEXEC from CRASH_DUMP
Date: Wed, 29 Nov 2023 22:04:09 +0000
In commit f8ff23429c62 ("kernel/Kconfig.kexec: drop select of KEXEC for
CRASH_DUMP") we tried to fix a config regression, where CONFIG_CRASH_DUMP
required CONFIG_KEXEC.
However, it was not enough at least for arm64 platforms. While further
testing the patch with our arm64 config I noticed that CONFIG_CRASH_DUMP
is unavailable in menuconfig. This is because CONFIG_CRASH_DUMP still
depends on the new CONFIG_ARCH_SUPPORTS_KEXEC introduced in commit
91506f7e5d21 ("arm64/kexec: refactor for kernel/Kconfig.kexec") and on
arm64 CONFIG_ARCH_SUPPORTS_KEXEC requires CONFIG_PM_SLEEP_SMP=y, which in
turn requires either CONFIG_SUSPEND=y or CONFIG_HIBERNATION=y neither of
which are set in our config.
Given that we already established that CONFIG_KEXEC (which is a switch for
kexec system call itself) is not required for CONFIG_CRASH_DUMP drop
CONFIG_ARCH_SUPPORTS_KEXEC dependency as well. The arm64 kernel builds
just fine with CONFIG_CRASH_DUMP=y and with both CONFIG_KEXEC=n and
CONFIG_KEXEC_FILE=n after f8ff23429c62 ("kernel/Kconfig.kexec: drop select
of KEXEC for CRASH_DUMP") and this patch are applied given that the
necessary shared bits are included via CONFIG_KEXEC_CORE dependency.
Link: https://lkml.kernel.org/r/20231129220409.55006-1-ignat@xxxxxxxxxxxxxx
Fixes: 91506f7e5d21 ("arm64/kexec: refactor for kernel/Kconfig.kexec")
Signed-off-by: Ignat Korchagin <ignat@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/Kconfig.kexec | 1 -
1 file changed, 1 deletion(-)
--- a/kernel/Kconfig.kexec~kexec-drop-dependency-on-arch_supports_kexec-from-crash_dump
+++ a/kernel/Kconfig.kexec
@@ -94,7 +94,6 @@ config KEXEC_JUMP
config CRASH_DUMP
bool "kernel crash dumps"
depends on ARCH_SUPPORTS_CRASH_DUMP
- depends on ARCH_SUPPORTS_KEXEC
select CRASH_CORE
select KEXEC_CORE
help
_
Patches currently in -mm which might be from ignat@xxxxxxxxxxxxxx are
kexec-drop-dependency-on-arch_supports_kexec-from-crash_dump.patch
