[PULL 02/18] pc-bios/s390-ccw: Add a proper prototype for main()

[Thomas Huth]

Older versions of Clang complain if there is no prototype for main().
Add one, and while we're at it, make sure that we use the same type
for main.c and netmain.c - since the return value does not matter,
declare the return type of main() as "void".

Message-Id: <20220704111903.62400-2-thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 pc-bios/s390-ccw/s390-ccw.h | 1 +
 pc-bios/s390-ccw/main.c     | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 79db69ff54..b88e0550ab 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -57,6 +57,7 @@ void write_subsystem_identification(void);
 void write_iplb_location(void);
 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
 unsigned int get_loadparm_index(void);
+void main(void);
 
 /* sclp.c */
 void sclp_print(const char *string);
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 5d2b7ba94d..835341457d 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -281,7 +281,7 @@ static void probe_boot_device(void)
     sclp_print("Could not find a suitable boot device (none specified)\n");
 }
 
-int main(void)
+void main(void)
 {
     sclp_setup();
     css_setup();
@@ -294,5 +294,4 @@ int main(void)
     }
 
     panic("Failed to load OS from hard disk\n");
-    return 0; /* make compiler happy */
 }
-- 
2.31.1