6.15-stable review patch. If anyone has any objections, please let me know.
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From: Eddie James eajames@linux.ibm.com
[ Upstream commit 882b25af265de8e05c66f72b9a29f6047102958f ]
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: Sasha Levin sashal@kernel.org --- 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 9ac3266e49652..a325c1c02f96d 100644 --- a/arch/powerpc/kexec/crash.c +++ b/arch/powerpc/kexec/crash.c @@ -359,7 +359,10 @@ 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);