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@@ -588,104 +588,3 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
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}
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return 0;
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}
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-
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-/* Set a delayed signal that was detected in MCA/INIT/NMI/PMI context where it
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- * could not be delivered. It is important that the target process is not
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- * allowed to do any more work in user space. Possible cases for the target
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- * process:
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- *
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- * - It is sleeping and will wake up soon. Store the data in the current task,
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- * the signal will be sent when the current task returns from the next
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- * interrupt.
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- *
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- * - It is running in user context. Store the data in the current task, the
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- * signal will be sent when the current task returns from the next interrupt.
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- *
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- * - It is running in kernel context on this or another cpu and will return to
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- * user context. Store the data in the target task, the signal will be sent
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- * to itself when the target task returns to user space.
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- *
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- * - It is running in kernel context on this cpu and will sleep before
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- * returning to user context. Because this is also the current task, the
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- * signal will not get delivered and the task could sleep indefinitely.
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- * Store the data in the idle task for this cpu, the signal will be sent
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- * after the idle task processes its next interrupt.
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- *
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- * To cover all cases, store the data in the target task, the current task and
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- * the idle task on this cpu. Whatever happens, the signal will be delivered
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- * to the target task before it can do any useful user space work. Multiple
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- * deliveries have no unwanted side effects.
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- *
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- * Note: This code is executed in MCA/INIT/NMI/PMI context, with interrupts
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- * disabled. It must not take any locks nor use kernel structures or services
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- * that require locks.
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- */
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-
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-/* To ensure that we get the right pid, check its start time. To avoid extra
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- * include files in thread_info.h, convert the task start_time to unsigned long,
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- * giving us a cycle time of > 580 years.
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- */
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-static inline unsigned long
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-start_time_ul(const struct task_struct *t)
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-{
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- return t->start_time.tv_sec * NSEC_PER_SEC + t->start_time.tv_nsec;
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-}
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-
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-void
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-set_sigdelayed(pid_t pid, int signo, int code, void __user *addr)
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-{
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- struct task_struct *t;
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- unsigned long start_time = 0;
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- int i;
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-
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- for (i = 1; i <= 3; ++i) {
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- switch (i) {
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- case 1:
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- t = find_task_by_pid(pid);
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- if (t)
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- start_time = start_time_ul(t);
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- break;
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- case 2:
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- t = current;
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- break;
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- default:
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- t = idle_task(smp_processor_id());
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- break;
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- }
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-
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- if (!t)
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- return;
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- task_thread_info(t)->sigdelayed.signo = signo;
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- task_thread_info(t)->sigdelayed.code = code;
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- task_thread_info(t)->sigdelayed.addr = addr;
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- task_thread_info(t)->sigdelayed.start_time = start_time;
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- task_thread_info(t)->sigdelayed.pid = pid;
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- wmb();
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- set_tsk_thread_flag(t, TIF_SIGDELAYED);
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- }
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-}
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-
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-/* Called from entry.S when it detects TIF_SIGDELAYED, a delayed signal that
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- * was detected in MCA/INIT/NMI/PMI context where it could not be delivered.
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- */
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-
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-void
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-do_sigdelayed(void)
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-{
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- struct siginfo siginfo;
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- pid_t pid;
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- struct task_struct *t;
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-
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- clear_thread_flag(TIF_SIGDELAYED);
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- memset(&siginfo, 0, sizeof(siginfo));
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- siginfo.si_signo = current_thread_info()->sigdelayed.signo;
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- siginfo.si_code = current_thread_info()->sigdelayed.code;
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- siginfo.si_addr = current_thread_info()->sigdelayed.addr;
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- pid = current_thread_info()->sigdelayed.pid;
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- t = find_task_by_pid(pid);
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- if (!t)
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- return;
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- if (current_thread_info()->sigdelayed.start_time != start_time_ul(t))
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- return;
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- force_sig_info(siginfo.si_signo, &siginfo, t);
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-}
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Keith Owens