From: Russell King Date: Wed, 11 Apr 2018 18:35:19 +0000 (+0100) Subject: ARM: kexec: record parent context registers for non-crash CPUs X-Git-Tag: v4.17-rc6~3^2~6 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=1c37963b1a1600b9686c4a99857ddcb6028be884;p=users%2Fhch%2Fmisc.git ARM: kexec: record parent context registers for non-crash CPUs How we got to machine_crash_nonpanic_core() (iow, from an IPI, etc) is not interesting for debugging a crash. The more interesting context is the parent context prior to the IPI being received. Record the parent context register state rather than the register state in machine_crash_nonpanic_core(), which is more relevant to the failing condition. Signed-off-by: Russell King --- diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index c15318431986..dd2eb5f76b9f 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -83,7 +83,7 @@ void machine_crash_nonpanic_core(void *unused) { struct pt_regs regs; - crash_setup_regs(®s, NULL); + crash_setup_regs(®s, get_irq_regs()); printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n", smp_processor_id()); crash_save_cpu(®s, smp_processor_id());