On powerpc, the panic CPU sends an IPI to shoot down other CPUs. Since not an NMI, may not able to stop all CPUs before kdump boot. However, one solution could be, if some CPUs are not stopped, asking the user to activate soft-reset (either from management console or pressing soft-reset button) which sends FW NMI to all CPUs. These CPUS will execute arch specific kdump func which has to be invoked machine_kexec() directly. At present, kexec_crash_image is not passed to machine_crash_shutdown() or defined as static in kexec.c.

Signed-off-by: David Wilder <dwilder@us.ibm.com>
Signed-off-by: Haren Myneni <haren@us.ibm.com>

--- 2617-rc1/kernel/kexec.c.orig	2006-04-05 13:27:53.000000000 -0700
+++ 2617-rc1/kernel/kexec.c	2006-04-05 13:27:43.000000000 -0700
@@ -903,7 +903,7 @@ static int kimage_load_segment(struct ki
  * that to happen you need to do that yourself.
  */
 struct kimage *kexec_image = NULL;
-static struct kimage *kexec_crash_image = NULL;
+struct kimage *kexec_crash_image = NULL;
 /*
  * A home grown binary mutex.
  * Nothing can wait so this mutex is safe to use
@@ -1042,7 +1042,6 @@ asmlinkage long compat_sys_kexec_load(un
 
 void crash_kexec(struct pt_regs *regs)
 {
-	struct kimage *image;
 	int locked;
 
 
@@ -1056,12 +1055,11 @@ void crash_kexec(struct pt_regs *regs)
 	 */
 	locked = xchg(&kexec_lock, 1);
 	if (!locked) {
-		image = xchg(&kexec_crash_image, NULL);
-		if (image) {
+		if (kexec_crash_image) {
 			struct pt_regs fixed_regs;
 			crash_setup_regs(&fixed_regs, regs);
 			machine_crash_shutdown(&fixed_regs);
-			machine_kexec(image);
+			machine_kexec(kexec_crash_image);
 		}
 		xchg(&kexec_lock, 0);
 	}