Fix function prototypes with unspecified arguments

Change functions declared as taking unspecified number of arguments
of unspecified type to functions that take no arguments.

Reported by kernel's checkpatch.pl script.

Author: ldv-alt

strace.c

@@ -2319,7 +2319,7 @@ next_event(int *pstatus, siginfo_t *si)
 
 	/*
 	 * Used to exit simply when nprocs hits zero, but in this testcase:
-	 *  int main() { _exit(!!fork()); }
+	 *  int main(void) { _exit(!!fork()); }
 	 * under strace -f, parent sometimes (rarely) manages
 	 * to exit before we see the first stop of the child,
 	 * and we are losing track of it:
@@ -2594,7 +2594,7 @@ dispatch_event(enum trace_event ret, int *pstatus, siginfo_t *si)
 }
 
 #ifdef ENABLE_COVERAGE_GCOV
-extern void __gcov_flush();
+extern void __gcov_flush(void);
 #endif
 
 static void ATTRIBUTE_NORETURN

test/mmap_offset_decode.c

@@ -22,7 +22,9 @@
 #define _FILE_OFFSET_BITS 64
 #include <sys/mman.h>
 #include <errno.h>
-int main()
+
+int
+main(void)
 {
 	/* 0x1000 is meant to be page size multiplier */
 	mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,

test/mtd.c

@@ -6,7 +6,9 @@
 #include <sys/ioctl.h>
 #include <mtd/mtd-user.h>
 
-int main() {
+int
+main(void)
+{
 	int fd = open("/dev/null", 0);
 	struct mtd_info_user minfo;
 	struct erase_info_user einfo;

test/sig.c

@@ -2,12 +2,14 @@
 #include <signal.h>
 #include <unistd.h>
 
-void interrupt()
+static void
+interrupt(void)
 {
 	write(2, "xyzzy\n", 6);
 }
 
-int main(int argc, char *argv[])
+int
+main(int argc, char *argv[])
 {
 	char buf[1024];
 

test/ubi.c

@@ -9,7 +9,9 @@
 
 #define zero(x) memset(&x, 0, sizeof(x))
 
-int main() {
+int
+main(void)
+{
 	int fd = open("/dev/null", 0);
 	struct ubi_mkvol_req mkvol = {
 		.vol_id = 3,

test/wait_must_be_interruptible.c

@@ -18,12 +18,14 @@ static const char msg1[] = "Child signals parent\n";
 static const char msg2[] = "Parent got signal\n";
 static const char msg3[] = "Child will exit now\n";
 
-static void handler(int s)
+static void
+handler(int s)
 {
 	write(1, msg2, sizeof(msg2)-1);
 }
 
-static void test()
+static void
+test(void)
 {
 	/* Note: in Linux, signal() installs handler with SA_RESTART flag,
 	 * therefore wait will be restarted.
@@ -45,7 +47,8 @@ static void test()
 	_exit(0);
 }
 
-int main()
+int
+main(void)
 {
 	char buf1[80];
 	char buf2[80];