[PATCH 12/14] cris arch-v10: use generic ptrace_resume code

[Christoph Hellwig <hch@lst.de>]

Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT and
PTRACE_KILL.  This also makes PTRACE_SINGLESTEP return -EIO while it
previously succeeded despite not actually causing any kind of single
stepping.

Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL
which it previously wasn't which is consistent with all architectures
using the modern ptrace code.

Signed-off-by: Christoph Hellwig <hch@lst.de>

Index: linux-2.6/arch/cris/arch-v10/kernel/ptrace.c
===================================================================
--- linux-2.6.orig/arch/cris/arch-v10/kernel/ptrace.c	2010-02-02 19:23:58.567254756 +0100
+++ linux-2.6/arch/cris/arch-v10/kernel/ptrace.c	2010-02-02 19:24:33.483004794 +0100
@@ -115,57 +115,6 @@ long arch_ptrace(struct task_struct *chi
 			ret = 0;
 			break;
 
-		case PTRACE_SYSCALL:
-		case PTRACE_CONT:
-			ret = -EIO;
-			
-			if (!valid_signal(data))
-				break;
-                        
-			if (request == PTRACE_SYSCALL) {
-				set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-			}
-			else {
-				clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-			}
-			
-			child->exit_code = data;
-			
-			/* TODO: make sure any pending breakpoint is killed */
-			wake_up_process(child);
-			ret = 0;
-			
-			break;
-		
- 		/* Make the child exit by sending it a sigkill. */
-		case PTRACE_KILL:
-			ret = 0;
-			
-			if (child->exit_state == EXIT_ZOMBIE)
-				break;
-			
-			child->exit_code = SIGKILL;
-			
-			/* TODO: make sure any pending breakpoint is killed */
-			wake_up_process(child);
-			break;
-
-		/* Set the trap flag. */
-		case PTRACE_SINGLESTEP:
-			ret = -EIO;
-			
-			if (!valid_signal(data))
-				break;
-			
-			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-
-			/* TODO: set some clever breakpoint mechanism... */
-
-			child->exit_code = data;
-			wake_up_process(child);
-			ret = 0;
-			break;
-
 		/* Get all GP registers from the child. */
 		case PTRACE_GETREGS: {
 		  	int i;