From: Eddie James <eajames@linux.ibm.com> mainline inclusion from mainline-v6.16 commit 882b25af265de8e05c66f72b9a29f6047102958f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/ICCPJ6 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- In non-smp configurations, crash_kexec_prepare is never called in the crash shutdown path. One result of this is that the crashing_cpu variable is never set, preventing crash_save_cpu from storing the NT_PRSTATUS elf note in the core dump. Fixes: c7255058b543 ("powerpc/crash: save cpu register data in crash_smp_send_stop()") Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20250211162054.857762-1-eajames@linux.ibm.com Signed-off-by: Tengda Wu <wutengda2@huawei.com> --- arch/powerpc/kexec/crash.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kexec/crash.c b/arch/powerpc/kexec/crash.c index ef5c2d25ec39..61552bbb1ea8 100644 --- a/arch/powerpc/kexec/crash.c +++ b/arch/powerpc/kexec/crash.c @@ -356,7 +356,10 @@ void default_machine_crash_shutdown(struct pt_regs *regs) if (TRAP(regs) == INTERRUPT_SYSTEM_RESET) is_via_system_reset = 1; - crash_smp_send_stop(); + if (IS_ENABLED(CONFIG_SMP)) + crash_smp_send_stop(); + else + crash_kexec_prepare(); crash_save_cpu(regs, crashing_cpu); -- 2.34.1