ptrace: remove PT_DTRACE from avr32, mn10300, parisc, s390, sh, xtensa

avr32, mn10300, parisc, s390, sh, xtensa:

They never set PT_DTRACE, but clear it after do_execve().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Chris Zankel <chris@zankel.net>
Acked-by: Roland McGrath <roland@redhat.com>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/avr32/kernel/process.c

@@ -394,8 +394,6 @@ asmlinkage int sys_execve(char __user *ufilename, char __user *__user *uargv,
 		goto out;
 
 	error = do_execve(filename, uargv, uenvp, regs);
-	if (error == 0)
-		current->ptrace &= ~PT_DTRACE;
 	putname(filename);
 
 out:

arch/mn10300/kernel/process.c

@@ -281,9 +281,6 @@ asmlinkage long sys_execve(char __user *name,
 	error = PTR_ERR(filename);
 	if (!IS_ERR(filename)) {
 		error = do_execve(filename, argv, envp, __frame);
-		if (error == 0)
-			current->ptrace &= ~PT_DTRACE;
-
 		putname(filename);
 	}
 

arch/parisc/hpux/fs.c

@@ -44,11 +44,6 @@ int hpux_execve(struct pt_regs *regs)
 	error = do_execve(filename, (char __user * __user *) regs->gr[25],
 		(char __user * __user *) regs->gr[24], regs);
 
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 
 out:

arch/parisc/kernel/process.c

@@ -349,11 +349,6 @@ asmlinkage int sys_execve(struct pt_regs *regs)
 		goto out;
 	error = do_execve(filename, (char __user * __user *) regs->gr[25],
 		(char __user * __user *) regs->gr[24], regs);
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 out:
 

arch/parisc/kernel/sys_parisc32.c

@@ -77,11 +77,6 @@ asmlinkage int sys32_execve(struct pt_regs *regs)
 		goto out;
 	error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
 				 compat_ptr(regs->gr[24]), regs);
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 out:
 

arch/s390/kernel/compat_linux.c

@@ -461,9 +461,6 @@ asmlinkage long sys32_execve(void)
 		result = rc;
 		goto out_putname;
 	}
-	task_lock(current);
-	current->ptrace &= ~PT_DTRACE;
-	task_unlock(current);
 	current->thread.fp_regs.fpc=0;
 	asm volatile("sfpc %0,0" : : "d" (0));
 	result = regs->gprs[2];

arch/s390/kernel/process.c

@@ -266,9 +266,6 @@ SYSCALL_DEFINE0(vfork)
 
 asmlinkage void execve_tail(void)
 {
-	task_lock(current);
-	current->ptrace &= ~PT_DTRACE;
-	task_unlock(current);
 	current->thread.fp_regs.fpc = 0;
 	if (MACHINE_HAS_IEEE)
 		asm volatile("sfpc %0,%0" : : "d" (0));

arch/sh/kernel/process_32.c

@@ -367,11 +367,6 @@ asmlinkage int sys_execve(char __user *ufilename, char __user * __user *uargv,
 		goto out;
 
 	error = do_execve(filename, uargv, uenvp, regs);
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 out:
 	return error;

arch/sh/kernel/process_64.c

@@ -529,11 +529,6 @@ asmlinkage int sys_execve(char *ufilename, char **uargv,
 			  (char __user * __user *)uargv,
 			  (char __user * __user *)uenvp,
 			  pregs);
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 out:
 	return error;

arch/xtensa/kernel/process.c

@@ -331,11 +331,6 @@ long xtensa_execve(char __user *name, char __user * __user *argv,
 	if (IS_ERR(filename))
 		goto out;
 	error = do_execve(filename, argv, envp, regs);
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 out:
 	return error;