diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2009-04-02 16:58:11 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-15 09:40:18 -0700 |
| commit | 887832b0dc724dec5d0fe7a0e58e035294ce1008 (patch) | |
| tree | 2640378adbdd8f1ad3829c6ab64db3701cd8a6fa | |
| parent | d1e765382f287bd9707b95600b6424eea2c4326b (diff) | |
ptrace: kill __ptrace_detach(), fix ->exit_state check
commit 95c3eb76dc07fd81289888ffc42948196b34b444 upstream.
Move the code from __ptrace_detach() to its single caller and kill this
helper.
Also, fix the ->exit_state check, we shouldn't wake up EXIT_DEAD tasks.
Actually, I think task_is_stopped_or_traced() makes more sense, but this
needs another patch.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | kernel/ptrace.c | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index dc3b98ef10b..2f5ec7a571a 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -235,16 +235,6 @@ out: return retval; } -static inline void __ptrace_detach(struct task_struct *child, unsigned int data) -{ - child->exit_code = data; - /* .. re-parent .. */ - __ptrace_unlink(child); - /* .. and wake it up. */ - if (child->exit_state != EXIT_ZOMBIE) - wake_up_process(child); -} - int ptrace_detach(struct task_struct *child, unsigned int data) { if (!valid_signal(data)) @@ -254,10 +244,16 @@ int ptrace_detach(struct task_struct *child, unsigned int data) ptrace_disable(child); clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - write_lock_irq(&tasklist_lock); /* protect against de_thread()->release_task() */ - if (child->ptrace) - __ptrace_detach(child, data); + write_lock_irq(&tasklist_lock); + if (child->ptrace) { + child->exit_code = data; + + __ptrace_unlink(child); + + if (!child->exit_state) + wake_up_process(child); + } write_unlock_irq(&tasklist_lock); return 0; |