testsuite: Fix warnings due to -Wmissing-prototypes

/testsuite/module-playground/mod-foo-b.c:13:6: warning: no previous prototype for ‘print_fooB’ [-Wmissing-prototypes]
   13 | void print_fooB(void)
      |      ^~~~~~~~~~
/testsuite/module-playground/mod-foo-a.c:13:6: warning: no previous prototype for ‘print_fooA’ [-Wmissing-prototypes]
   13 | void print_fooA(void)
      |      ^~~~~~~~~~
/testsuite/module-playground/mod-foo-c.c:13:6: warning: no previous prototype for ‘print_fooC’ [-Wmissing-prototypes]
   13 | void print_fooC(void)
      |      ^~~~~~~~~~
/testsuite/module-playground/mod-fake-scsi-mod.c:15:6: warning: no previous prototype for ‘dummy_export’ [-Wmissing-prototypes]
   15 | void dummy_export(void)
      |      ^~~~~~~~~~~~

Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>

4 files changed, 8 insertions, 0 deletions

diff --git a/testsuite/module-playground/mod-fake-scsi-mod.c b/testsuite/module-playground/mod-fake-scsi-mod.c
index 916a04d..f335b6f 100644
--- a/testsuite/module-playground/mod-fake-scsi-mod.c
+++ b/testsuite/module-playground/mod-fake-scsi-mod.c
@@ -1,6 +1,8 @@
 #include <linux/init.h>
 #include <linux/module.h>
 
+void dummy_export(void);
+
 static int __init test_module_init(void)
 {
 	return 0;
diff --git a/testsuite/module-playground/mod-foo-a.c b/testsuite/module-playground/mod-foo-a.c
index bc65f66..4eeeb0b 100644
--- a/testsuite/module-playground/mod-foo-a.c
+++ b/testsuite/module-playground/mod-foo-a.c
@@ -4,6 +4,8 @@
 #include <linux/module.h>
 #include <linux/printk.h>
 
+void print_fooA(void);
+
 static int __init foo_init(void)
 {
 	return 0;
diff --git a/testsuite/module-playground/mod-foo-b.c b/testsuite/module-playground/mod-foo-b.c
index 09079f6..0c92b1b 100644
--- a/testsuite/module-playground/mod-foo-b.c
+++ b/testsuite/module-playground/mod-foo-b.c
@@ -4,6 +4,8 @@
 #include <linux/module.h>
 #include <linux/printk.h>
 
+void print_fooB(void);
+
 static int __init foo_init(void)
 {
 	return 0;
diff --git a/testsuite/module-playground/mod-foo-c.c b/testsuite/module-playground/mod-foo-c.c
index 3afd35d..a8917c8 100644
--- a/testsuite/module-playground/mod-foo-c.c
+++ b/testsuite/module-playground/mod-foo-c.c
@@ -4,6 +4,8 @@
 #include <linux/module.h>
 #include <linux/printk.h>
 
+void print_fooC(void);
+
 static int __init foo_init(void)
 {
 	return 0;