Merge penguin:v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

arch/alpha/kernel/process.c

@@ -235,23 +235,18 @@ int
 alpha_clone(unsigned long clone_flags, unsigned long usp, int *parent_tid,
 	    int *child_tid, unsigned long tls_value, struct pt_regs *regs)
 {
-	struct task_struct *p;
-
 	if (!usp)
 		usp = rdusp();
 
-	p = do_fork(clone_flags & ~CLONE_IDLETASK, usp, regs, 0,
+	return do_fork(clone_flags & ~CLONE_IDLETASK, usp, regs, 0,
 		       parent_tid, child_tid);
-	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
 int
 alpha_vfork(struct pt_regs *regs)
 {
-	struct task_struct *p;
-	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(),
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(),
 		       regs, 0, NULL, NULL);
-	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
 /*

arch/alpha/kernel/ptrace.c

@@ -366,8 +366,8 @@ do_sys_ptrace(long request, long pid, long addr, long data,
 		ret = -EIO;
 		if ((unsigned long) data > _NSIG)
 			break;
-		/* Mark single stepping.  */
-		child->thread_info->bpt_nsaved = -1;
+		/* Set single stepping.  */
+		ptrace_set_bpt(child);
 		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		wake_up_process(child);
 		child->exit_code = data;
@@ -397,11 +397,11 @@ syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-					? 0x80 : 0);
-	current->state = TASK_STOPPED;
-	notify_parent(current, SIGCHLD);
-	schedule();
+	/* The 0x80 provides a way for the tracing parent to distinguish
+	   between a syscall stop and SIGTRAP delivery */
+	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+				 ? 0x80 : 0));
+
 	/*
 	 * This isn't the same as continuing with a signal, but it will do
 	 * for normal use.  strace only continues with a signal if the

arch/alpha/kernel/smp.c

@@ -417,7 +417,12 @@ fork_by_hand(void)
 	/* Don't care about the contents of regs since we'll never
 	   reschedule the forked task. */
 	struct pt_regs regs;
-	return do_fork(CLONE_VM|CLONE_IDLETASK, 0, &regs, 0, NULL, NULL);
+	int pid;
+	pid = do_fork(CLONE_VM|CLONE_IDLETASK, 0, &regs, 0, NULL, NULL);
+	if (pid < 0)
+		return NULL;
+
+	return find_task_by_pid (pid);
 }
 
 /*
@@ -436,7 +441,7 @@ smp_boot_one_cpu(int cpuid)
 	   wish.  We can't use kernel_thread since we must avoid
 	   rescheduling the child.  */
 	idle = fork_by_hand();
-	if (IS_ERR(idle))
+	if (!idle)
 		panic("failed fork for CPU %d", cpuid);
 
 	init_idle(idle, cpuid);

arch/arm/kernel/sys_arm.c

@@ -238,9 +238,7 @@ asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr,
  */
 asmlinkage int sys_fork(struct pt_regs *regs)
 {
-	struct task_struct *p;
-	p = do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
-	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
+	return do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
 }
 
 /* Clone a task - this clones the calling program thread.
@@ -248,8 +246,6 @@ asmlinkage int sys_fork(struct pt_regs *regs)
  */
 asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, struct pt_regs *regs)
 {
-	struct task_struct *p;
-
 	/*
 	 * We don't support SETTID / CLEARTID
 	 */
@@ -259,16 +255,12 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, struct
 	if (!newsp)
 		newsp = regs->ARM_sp;
 
-	p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, regs, 0, NULL, NULL);
-
-	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
+	return do_fork(clone_flags & ~CLONE_IDLETASK, newsp, regs, 0, NULL, NULL);
 }
 
 asmlinkage int sys_vfork(struct pt_regs *regs)
 {
-	struct task_struct *p;
-	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
-	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
 }
 
 /* sys_execve() executes a new program.