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mcexec_syscall(): avoid calling task_pid_nr_ns() in IRQ context

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Balazs Gerofi
2016-12-26 20:43:17 +09:00
parent 16e846e9b6
commit 6ad84a96a3
2 changed files with 4 additions and 1 deletions
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2
executer/kernel/mcctrl/control.c
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@@ -789,7 +789,7 @@ int mcexec_syscall(struct mcctrl_usrdata *ud, struct ikc_scd_packet *packet)
/* Is this a request for a specific thread? See if it's waiting */ /* Is this a request for a specific thread? See if it's waiting */
if (unlikely(packet->req.ttid)) { if (unlikely(packet->req.ttid)) {
list_for_each_entry(wqhln_iter, &ppd->wq_list_exact, list) { list_for_each_entry(wqhln_iter, &ppd->wq_list_exact, list) {
if (packet->req.ttid != task_pid_vnr(wqhln_iter->task)) if (packet->req.ttid != wqhln_iter->rtid)
continue; continue;
wqhln = wqhln_iter; wqhln = wqhln_iter;

3
executer/kernel/mcctrl/syscall.c
View File

@@ -326,6 +326,9 @@ retry_alloc:
/* Prepare per-thread wait queue head */ /* Prepare per-thread wait queue head */
wqhln->task = current; wqhln->task = current;
/* Save the TID explicitly, because mcexec_syscall(), where the request
* will be matched, is in IRQ context and can't call task_pid_vnr() */
wqhln->rtid = task_pid_vnr(current);
wqhln->req = 0; wqhln->req = 0;
init_waitqueue_head(&wqhln->wq_syscall); init_waitqueue_head(&wqhln->wq_syscall);