Consolidate PTRACE_DETACH

Identical handlers of PTRACE_DETACH go into ptrace_request().
Not touching compat code.
Not touching archs that don't call ptrace_request.

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/kernel/ptrace.c

@@ -368,10 +368,6 @@ do_sys_ptrace(long request, long pid, long addr, long data,
 		ret = 0;
 		goto out;
 
-	case PTRACE_DETACH:	 /* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		goto out;
-
 	default:
 		ret = ptrace_request(child, request, addr, data);
 		goto out;

arch/arm/kernel/ptrace.c

@@ -731,10 +731,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			ret = 0;
 			break;
 
-		case PTRACE_DETACH:
-			ret = ptrace_detach(child, data);
-			break;
-
 		case PTRACE_GETREGS:
 			ret = ptrace_getregs(child, (void __user *)data);
 			break;

arch/avr32/kernel/ptrace.c

@@ -227,11 +227,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = 0;
 		break;
 
-	/* Detach a process that was attached */
-	case PTRACE_DETACH:
-		ret = ptrace_detach(child, data);
-		break;
-
 	case PTRACE_GETREGS:
 		ret = ptrace_getregs(child, (void __user *)data);
 		break;

arch/blackfin/kernel/ptrace.c

@@ -385,12 +385,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			break;
 		}
 
-	case PTRACE_DETACH:
-		{		/* detach a process that was attached. */
-			ret = ptrace_detach(child, data);
-			break;
-		}
-
 	case PTRACE_GETREGS:
 		{
 

arch/cris/arch-v10/kernel/ptrace.c

@@ -177,10 +177,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			ret = 0;
 			break;
 
-		case PTRACE_DETACH:
-			ret = ptrace_detach(child, data);
-			break;
-
 		/* Get all GP registers from the child. */
 		case PTRACE_GETREGS: {
 		  	int i;

arch/cris/arch-v32/kernel/ptrace.c

@@ -245,10 +245,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			break;
 
 		}
-		case PTRACE_DETACH:
-			ret = ptrace_detach(child, data);
-			break;
-
 		/* Get all GP registers from the child. */
 		case PTRACE_GETREGS: {
 		  	int i;

arch/m32r/kernel/ptrace.c

@@ -704,14 +704,6 @@ do_ptrace(long request, struct task_struct *child, long addr, long data)
 		break;
 	}
 
-	/*
-	 * detach a process that was attached.
-	 */
-	case PTRACE_DETACH:
-		ret = 0;
-		ret = ptrace_detach(child, data);
-		break;
-
 	case PTRACE_GETREGS:
 		ret = ptrace_getregs(child, (void __user *)data);
 		break;

arch/m68k/kernel/ptrace.c

@@ -226,10 +226,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		wake_up_process(child);
 		break;
 
-	case PTRACE_DETACH:	/* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 	case PTRACE_GETREGS:	/* Get all gp regs from the child. */
 		for (i = 0; i < 19; i++) {
 			tmp = get_reg(child, i);

arch/mips/kernel/ptrace.c

@@ -435,10 +435,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		wake_up_process(child);
 		break;
 
-	case PTRACE_DETACH: /* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 	case PTRACE_GET_THREAD_AREA:
 		ret = put_user(task_thread_info(child)->tp_value,
 				(unsigned long __user *) data);

arch/parisc/kernel/ptrace.c

@@ -329,10 +329,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		/* give it a chance to run. */
 		goto out_wake;
 
-	case PTRACE_DETACH:
-		ret = ptrace_detach(child, data);
-		goto out_tsk;
-
 	case PTRACE_GETEVENTMSG:
                 ret = put_user(child->ptrace_message, (unsigned int __user *) data);
 		goto out_tsk;

arch/powerpc/kernel/ptrace.c

@@ -505,10 +505,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = ptrace_set_debugreg(child, addr, data);
 		break;
 
-	case PTRACE_DETACH:
-		ret = ptrace_detach(child, data);
-		break;
-
 #ifdef CONFIG_PPC64
 	case PTRACE_GETREGS64:
 #endif

arch/s390/kernel/ptrace.c

@@ -683,11 +683,6 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
 		wake_up_process(child);
 		return 0;
 
-	case PTRACE_DETACH:
-		/* detach a process that was attached. */
-		return ptrace_detach(child, data);
-
-
 	/* Do requests that differ for 31/64 bit */
 	default:
 #ifdef CONFIG_COMPAT

arch/sh/kernel/ptrace.c

@@ -211,10 +211,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		break;
 	}
 
-	case PTRACE_DETACH: /* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 #ifdef CONFIG_SH_DSP
 	case PTRACE_GETDSPREGS: {
 		unsigned long dp;

arch/sh64/kernel/ptrace.c

@@ -244,10 +244,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		break;
 	}
 
-	case PTRACE_DETACH: /* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 	default:
 		ret = ptrace_request(child, request, addr, data);
 		break;

arch/um/kernel/ptrace.c

@@ -119,11 +119,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		break;
 	}
 
-	case PTRACE_DETACH:
-		/* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
- 		break;
-
 #ifdef PTRACE_GETREGS
 	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
 		if (!access_ok(VERIFY_WRITE, p, MAX_REG_OFFSET)) {

arch/x86/kernel/ptrace_32.c

@@ -524,11 +524,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = 0;
 		break;
 
-	case PTRACE_DETACH:
-		/* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
 	  	if (!access_ok(VERIFY_WRITE, datap, FRAME_SIZE*sizeof(long))) {
 			ret = -EIO;

arch/x86/kernel/ptrace_64.c

@@ -500,11 +500,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = 0;
 		break;
 
-	case PTRACE_DETACH:
-		/* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
 	  	if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
 			       sizeof(struct user_regs_struct))) {

arch/xtensa/kernel/ptrace.c

@@ -304,10 +304,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = put_user(sizeof(elf_fpregset_t), (unsigned long *) data);
 		break;
 
-	case PTRACE_DETACH: /* detach a process that was attached. */
-		ret = ptrace_detach(child, data);
-		break;
-
 	default:
 		ret = ptrace_request(child, request, addr, data);
 		goto out;

kernel/ptrace.c

@@ -386,6 +386,9 @@ int ptrace_request(struct task_struct *child, long request,
 	case PTRACE_SETSIGINFO:
 		ret = ptrace_setsiginfo(child, (siginfo_t __user *) data);
 		break;
+	case PTRACE_DETACH:	 /* detach a process that was attached. */
+		ret = ptrace_detach(child, data);
+		break;
 	default:
 		break;
 	}