m68k: Remove the BKL from sys_execve

This seems like a copy-and-paste from code that no-longer needs the BKL
Just remove it.
Signed-off-by: John Kacur <jkacur@redhat.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/kernel/process.c

@@ -317,15 +317,12 @@ asmlinkage int sys_execve(char __user *name, char __user * __user *argv, char __
 	char * filename;
 	struct pt_regs *regs = (struct pt_regs *) &name;
 
-	lock_kernel();
 	filename = getname(name);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
-		goto out;
+		return error;
 	error = do_execve(filename, argv, envp, regs);
 	putname(filename);
-out:
-	unlock_kernel();
 	return error;
 }