[PATCH 2/2] memblock tests: fix warning ‘struct seq_file’ declared inside parameter list

[Mike Rapoport <rppt@kernel.org>]

From: "Mike Rapoport (IBM)" <rppt@kernel.org>

Building memblock tests produces the following warning:

cc -I. -I../../include -Wall -O2 -fsanitize=address -fsanitize=undefined -D CONFIG_PHYS_ADDR_T_64BIT   -c -o main.o main.c
In file included from tests/common.h:9,
                 from tests/basic_api.h:5,
                 from main.c:2:
./linux/memblock.h:601:50: warning: ‘struct seq_file’ declared inside parameter list will not be visible outside of this definition or declaration
  601 | static inline void memtest_report_meminfo(struct seq_file *m) { }
      |                                                  ^~~~~~~~

Add declaration of 'struct seq_file' to tools/include/linux/seq_file.h
to fix it.

Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
---
 tools/include/linux/seq_file.h           | 2 ++
 tools/testing/memblock/tests/basic_api.c | 2 +-
 tools/testing/memblock/tests/common.h    | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/include/linux/seq_file.h b/tools/include/linux/seq_file.h
index 102fd9217f1f..f6bc226af0c1 100644
--- a/tools/include/linux/seq_file.h
+++ b/tools/include/linux/seq_file.h
@@ -1,4 +1,6 @@
 #ifndef _TOOLS_INCLUDE_LINUX_SEQ_FILE_H
 #define _TOOLS_INCLUDE_LINUX_SEQ_FILE_H
 
+struct seq_file;
+
 #endif /* _TOOLS_INCLUDE_LINUX_SEQ_FILE_H */
diff --git a/tools/testing/memblock/tests/basic_api.c b/tools/testing/memblock/tests/basic_api.c
index 411647094cc3..57bf2688edfd 100644
--- a/tools/testing/memblock/tests/basic_api.c
+++ b/tools/testing/memblock/tests/basic_api.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
+#include "basic_api.h"
 #include <string.h>
 #include <linux/memblock.h>
-#include "basic_api.h"
 
 #define EXPECTED_MEMBLOCK_REGIONS			128
 #define FUNC_ADD					"memblock_add"
diff --git a/tools/testing/memblock/tests/common.h b/tools/testing/memblock/tests/common.h
index 4f23302ee677..b5ec59aa62d7 100644
--- a/tools/testing/memblock/tests/common.h
+++ b/tools/testing/memblock/tests/common.h
@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <linux/types.h>
+#include <linux/seq_file.h>
 #include <linux/memblock.h>
 #include <linux/sizes.h>
 #include <linux/printk.h>
-- 
2.39.2