powerpc/kdump: Remove ppc_md.machine_crash_shutdown

No one uses ppc_md.machine_crash_shutdown, so remove it.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/machdep.h

@@ -234,12 +234,6 @@ struct machdep_calls {
 #ifdef CONFIG_KEXEC
 	void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 
-	/* Called to do the minimal shutdown needed to run a kexec'd kernel
-	 * to run successfully.
-	 * XXX Should we move this one out of kexec scope?
-	 */
-	void (*machine_crash_shutdown)(struct pt_regs *regs);
-
 	/* Called to do what every setup is needed on image and the
 	 * reboot code buffer. Returns 0 on success.
 	 * Provide your own (maybe dummy) implementation if your platform

arch/powerpc/kernel/machine_kexec.c

@@ -44,10 +44,7 @@ void machine_kexec_mask_interrupts(void) {
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
-	if (ppc_md.machine_crash_shutdown)
-		ppc_md.machine_crash_shutdown(regs);
-	else
-		default_machine_crash_shutdown(regs);
+	default_machine_crash_shutdown(regs);
 }
 
 /*

arch/powerpc/platforms/cell/qpace_setup.c

@@ -148,6 +148,5 @@ define_machine(qpace) {
 #ifdef CONFIG_KEXEC
 	.machine_kexec		= default_machine_kexec,
 	.machine_kexec_prepare	= default_machine_kexec_prepare,
-	.machine_crash_shutdown	= default_machine_crash_shutdown,
 #endif
 };

arch/powerpc/platforms/pseries/kexec.c

@@ -66,7 +66,6 @@ static int __init pseries_kexec_setup(void)
 {
 	ppc_md.machine_kexec = default_machine_kexec;
 	ppc_md.machine_kexec_prepare = default_machine_kexec_prepare;
-	ppc_md.machine_crash_shutdown = default_machine_crash_shutdown;
 
 	return 0;
 }