diff options
| -rw-r--r-- | arch/ia64/kernel/process.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c index d1c3ed9943e..af73b8dfde2 100644 --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -763,6 +763,9 @@ get_wchan (struct task_struct *p) unsigned long ip; int count = 0; + if (!p || p == current || p->state == TASK_RUNNING) + return 0; + /* * Note: p may not be a blocked task (it could be current or * another process running on some other CPU. Rather than @@ -773,6 +776,8 @@ get_wchan (struct task_struct *p) */ unw_init_from_blocked_task(&info, p); do { + if (p->state == TASK_RUNNING) + return 0; if (unw_unwind(&info) < 0) return 0; unw_get_ip(&info, &ip); |