get rid of ptrace_signal_deliver() arguments

the first one is equal to signal_pt_regs(), the second is never used
(and always NULL, while we are at it).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/m68k/include/asm/signal.h

@@ -87,8 +87,7 @@ static inline int sigfindinword(unsigned long word)
 #endif /* !CONFIG_CPU_HAS_NO_BITFIELDS */
 
 #ifndef __uClinux__
-struct pt_regs;
-extern void ptrace_signal_deliver(struct pt_regs *regs, void *cookie);
+extern void ptrace_signal_deliver(void);
 #define ptrace_signal_deliver ptrace_signal_deliver
 #endif /* __uClinux__ */
 

arch/m68k/kernel/signal.c

@@ -108,8 +108,9 @@ int handle_kernel_fault(struct pt_regs *regs)
 	return 1;
 }
 
-void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
+void ptrace_signal_deliver(void)
 {
+	struct pt_regs *regs = signal_pt_regs();
 	if (regs->orig_d0 < 0)
 		return;
 	switch (regs->d0) {

include/linux/ptrace.h

@@ -330,7 +330,7 @@ static inline void user_single_step_siginfo(struct task_struct *tsk,
 #endif
 
 #ifndef ptrace_signal_deliver
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
+#define ptrace_signal_deliver() ((void)0)
 #endif
 
 /*

kernel/signal.c

@@ -2141,7 +2141,7 @@ static void do_jobctl_trap(void)
 static int ptrace_signal(int signr, siginfo_t *info,
 			 struct pt_regs *regs, void *cookie)
 {
-	ptrace_signal_deliver(regs, cookie);
+	ptrace_signal_deliver();
 	/*
 	 * We do not check sig_kernel_stop(signr) but set this marker
 	 * unconditionally because we do not know whether debugger will