Add void for ANSI C

syscall.c

@@ -19,8 +19,6 @@
  * Return value? Error indication? Errno?
  */
 
-extern struct spinlock proc_table_lock;
-
 /*
  * fetch 32 bits from a user-supplied pointer.
  * returns 0 if addr was OK, -1 if illegal.
@@ -55,7 +53,7 @@ putint(struct proc *p, unsigned addr, int ip)
 }
 
 int
-sys_pipe()
+sys_pipe(void)
 {
   struct fd *rfd = 0, *wfd = 0;
   int f1 = -1, f2 = -1;
@@ -92,7 +90,7 @@ sys_pipe()
 }
 
 int
-sys_write()
+sys_write(void)
 {
   int fd, n, ret;
   unsigned addr;
@@ -111,7 +109,7 @@ sys_write()
 }
 
 int
-sys_read()
+sys_read(void)
 {
   int fd, n, ret;
   unsigned addr;
@@ -130,7 +128,7 @@ sys_read()
 }
 
 int
-sys_close()
+sys_close(void)
 {
   int fd;
   struct proc *p = curproc[cpu()];
@@ -147,7 +145,7 @@ sys_close()
 }
 
 int
-sys_fork()
+sys_fork(void)
 {
   struct proc *np;
 
@@ -161,14 +159,14 @@ sys_fork()
 }
 
 int
-sys_exit()
+sys_exit(void)
 {
   proc_exit();
   return 0;
 }
 
 int
-sys_wait()
+sys_wait(void)
 {
   struct proc *p;
   struct proc *cp = curproc[cpu()];
@@ -199,7 +197,7 @@ sys_wait()
 }
 
 int
-sys_cons_putc()
+sys_cons_putc(void)
 {
   int c;
 
@@ -234,7 +232,7 @@ sys_block(void)
 }
 
 int
-sys_kill()
+sys_kill(void)
 {
   int pid;
   struct proc *p;
@@ -255,7 +253,7 @@ sys_kill()
 }
 
 int
-sys_panic()
+sys_panic(void)
 {
   struct proc *p = curproc[cpu()];
   unsigned int addr;
@@ -266,7 +264,7 @@ sys_panic()
 }
 
 void
-syscall()
+syscall(void)
 {
   struct proc *cp = curproc[cpu()];
   int num = cp->tf->tf_regs.reg_eax;