Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/powerpc/perf/power7-pmu.c b/arch/powerpc/perf/power7-pmu.c
index 7963658..a137813 100644
--- a/arch/powerpc/perf/power7-pmu.c
+++ b/arch/powerpc/perf/power7-pmu.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Performance counter support for POWER7 processors.
  *
  * Copyright 2009 Paul Mackerras, IBM Corporation.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 #include <linux/kernel.h>
 #include <linux/perf_event.h>
@@ -238,6 +234,7 @@
 	case 6:
 		if (psel == 0x64)
 			return pmc >= 3;
+		break;
 	case 8:
 		return unit == 0xd;
 	}
@@ -444,7 +441,7 @@
 	.cache_events		= &power7_cache_events,
 };
 
-static int __init init_power7_pmu(void)
+int init_power7_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power7"))
@@ -455,5 +452,3 @@
 
 	return register_power_pmu(&power7_pmu);
 }
-
-early_initcall(init_power7_pmu);