panic, x86: Allow CPUs to save registers even if looping in NMI context

[cascardo/linux.git] / kernel / panic.c

diff --git a/kernel/panic.c b/kernel/panic.c
index 3344524..06f31b4 100644 (file)
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -61,6 +61,15 @@ void __weak panic_smp_self_stop(void)
                cpu_relax();
 }
 
+/*
+ * Stop ourselves in NMI context if another CPU has already panicked. Arch code
+ * may override this to prepare for crash dumping, e.g. save regs info.
+ */
+void __weak nmi_panic_self_stop(struct pt_regs *regs)
+{
+       panic_smp_self_stop();
+}
+
 atomic_t panic_cpu = ATOMIC_INIT(PANIC_CPU_INVALID);
 
 /**