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ptrace: do not use task->ptrace directly in core kernel

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No functional changes.

- Nobody except ptrace.c & co should use ptrace flags directly, we have
  task_ptrace() for that.

- No need to specially check PT_PTRACED, we must not have other PT_ bits
  set without PT_PTRACED. And no need to know this flag exists.

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Roland McGrath <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oleg Nesterov 2009-06-17 16:27:30 -07:00 • committed by Linus Torvalds
commit 5cb1144689
2 changed files with 8 additions and 8 deletions
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10
kernel/signal.c
View file

@ -1410,7 +1410,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
/* do_notify_parent_cldstop should have been called instead. */
BUG_ON(task_is_stopped_or_traced(tsk));
BUG_ON(!tsk->ptrace &&
BUG_ON(!task_ptrace(tsk) &&
(tsk->group_leader != tsk || !thread_group_empty(tsk)));
info.si_signo = sig;
@ -1449,7 +1449,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
psig = tsk->parent->sighand;
spin_lock_irqsave(&psig->siglock, flags);
if (!tsk->ptrace && sig == SIGCHLD &&
if (!task_ptrace(tsk) && sig == SIGCHLD &&
(psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN ||
(psig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDWAIT))) {
/*
@ -1486,7 +1486,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
struct task_struct *parent;
struct sighand_struct *sighand;
if (tsk->ptrace & PT_PTRACED)
if (task_ptrace(tsk))
parent = tsk->parent;
else {
tsk = tsk->group_leader;
@ -1535,7 +1535,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
static inline int may_ptrace_stop(void)
{
if (!likely(current->ptrace & PT_PTRACED))
if (!likely(task_ptrace(current)))
return 0;
/*
* Are we in the middle of do_coredump?
@ -1753,7 +1753,7 @@ static int do_signal_stop(int signr)
static int ptrace_signal(int signr, siginfo_t *info,
struct pt_regs *regs, void *cookie)
{
if (!(current->ptrace & PT_PTRACED))
if (!task_ptrace(current))
return signr;
ptrace_signal_deliver(regs, cookie);