powerpc: Fix default_machine_crash_shutdown #ifdef botch

commit c2be05481f6125254c45b78f334d4dd09c701c82 upstream.

crash_kexec_wait_realmode() is defined only if CONFIG_PPC_STD_MMU_64
and CONFIG_SMP, but is called if CONFIG_PPC_STD_MMU_64 even if !CONFIG_SMP.
Fix the conditional compilation around the invocation.

[PG: commit b3df895aebe091b1657 "powerpc/kexec: Add support for FSL-BookE"
 introduced the PPC_STD_MMU_64 check this refers to, but we don't want to
 cherry pick that whole addition to stable just for one #ifdef line.]

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 8c066d6a8e4b4ee015bc8ccf93bf5fc321267bbe..ddf1fea02f477171de23b0723c1f22dcb3ef6f96 100644 (file)
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -163,6 +163,7 @@ static void crash_kexec_prepare_cpus(int cpu)
 }
 
 /* wait for all the CPUs to hit real mode but timeout if they don't come in */
+#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
 static void crash_kexec_wait_realmode(int cpu)
 {
        unsigned int msecs;
@@ -187,6 +188,7 @@ static void crash_kexec_wait_realmode(int cpu)
        }
        mb();
 }
+#endif
 
 /*
  * This function will be called by secondary cpus or by kexec cpu
@@ -445,7 +447,9 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
        crash_kexec_prepare_cpus(crashing_cpu);
        cpu_set(crashing_cpu, cpus_in_crash);
        crash_kexec_stop_spus();
+#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
        crash_kexec_wait_realmode(crashing_cpu);
+#endif
        if (ppc_md.kexec_cpu_down)
                ppc_md.kexec_cpu_down(1, 0);
 }