sched/topology: Move sd_flag_debug out of linux/sched/topology.h

Defining an array in a header imported all over the place clearly is a daft
idea, that still didn't stop me from doing it.

Leave a declaration of sd_flag_debug in topology.h and move its definition
to sched/debug.c.

Fixes: b6e862f ("sched/topology: Define and assign sched_domain flag metadata")
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200825133216.9163-1-valentin.schneider@arm.com

Author: Valentin Schneider

include/linux/sched/topology.h

@@ -33,14 +33,13 @@ static const unsigned int SD_DEGENERATE_GROUPS_MASK =
 #undef SD_FLAG
 
 #ifdef CONFIG_SCHED_DEBUG
-#define SD_FLAG(_name, mflags) [__##_name] = { .meta_flags = mflags, .name = #_name },
-static const struct {
+
+struct sd_flag_debug {
 	unsigned int meta_flags;
 	char *name;
-} sd_flag_debug[] = {
-#include <linux/sched/sd_flags.h>
 };
-#undef SD_FLAG
+extern const struct sd_flag_debug sd_flag_debug[];
+
 #endif
 
 #ifdef CONFIG_SCHED_SMT

kernel/sched/debug.c

@@ -245,6 +245,12 @@ set_table_entry(struct ctl_table *entry,
 	entry->proc_handler = proc_handler;
 }
 
+#define SD_FLAG(_name, mflags) [__##_name] = { .meta_flags = mflags, .name = #_name },
+const struct sd_flag_debug sd_flag_debug[] = {
+#include <linux/sched/sd_flags.h>
+};
+#undef SD_FLAG
+
 static int sd_ctl_doflags(struct ctl_table *table, int write,
 			  void *buffer, size_t *lenp, loff_t *ppos)
 {