m68k: Remove ptrace_signal_deliver

This fixes debugger syscall restart interactions.  A debugger that
modifies the tracee's program counter is expected to set the orig_d0
pseudo register to -1, to disable a possible syscall restart.

This removes the last user of the ptrace_signal_deliver hook in the ptrace
signal handling, so remove that as well.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

4 files changed, 0 insertions, 26 deletions

diff --git a/arch/m68k/include/asm/signal.h b/arch/m68k/include/asm/signal.h
index 8c8ce5e1ee0e..3bc64d02ba5f 100644
--- a/arch/m68k/include/asm/signal.h
+++ b/arch/m68k/include/asm/signal.h
@@ -62,9 +62,4 @@ static inline int __gen_sigismember(sigset_t *set, int _sig)
 
 #endif /* !CONFIG_CPU_HAS_NO_BITFIELDS */
 
-#ifndef __uClinux__
-extern void ptrace_signal_deliver(void);
-#define ptrace_signal_deliver ptrace_signal_deliver
-#endif /* __uClinux__ */
-
 #endif /* _M68K_SIGNAL_H */
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index 6f945bb5ffbd..e79421f5b9cd 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -109,22 +109,6 @@ int fixup_exception(struct pt_regs *regs)
         return 1;
 }
 
-void ptrace_signal_deliver(void)
-{
-        struct pt_regs *regs = signal_pt_regs();
-        if (regs->orig_d0 < 0)
-                return;
-        switch (regs->d0) {
-        case -ERESTARTNOHAND:
-        case -ERESTARTSYS:
-        case -ERESTARTNOINTR:
-                regs->d0 = regs->orig_d0;
-                regs->orig_d0 = -1;
-                regs->pc -= 2;
-                break;
-        }
-}
-
 static inline void push_cache (unsigned long vaddr)
 {
         /*
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 422bc2e4cb6a..9a2e04be0657 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -388,10 +388,6 @@ static inline void user_single_step_siginfo(struct task_struct *tsk,
 #define current_pt_regs() task_pt_regs(current)
 #endif
 
-#ifndef ptrace_signal_deliver
-#define ptrace_signal_deliver() ((void)0)
-#endif
-
 /*
  * unlike current_pt_regs(), this one is equal to task_pt_regs(current)
  * on *all* architectures; the only reason to have a per-arch definition
diff --git a/kernel/signal.c b/kernel/signal.c
index ca92bcfeb322..f0a48e5b1f0b 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2092,7 +2092,6 @@ static void do_jobctl_trap(void)
 
 static int ptrace_signal(int signr, siginfo_t *info)
 {
-        ptrace_signal_deliver();
         /*
          * We do not check sig_kernel_stop(signr) but set this marker
          * unconditionally because we do not know whether debugger will