[IA64] Delete MCA/INIT sigdelayed code

The only user of the MCA/INIT sigdelayed code (SGI's I/O probing) has
moved from the kernel into SAL.  Delete the MCA/INIT sigdelayed code.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 0 insertions, 115 deletions

diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 7a6ffd613789..9dda7a36d1ee 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1100,9 +1100,6 @@ skip_rbs_switch:
         st8 [r2]=r8
         st8 [r3]=r10
 .work_pending:
-        tbit.nz p6,p0=r31,TIF_SIGDELAYED                // signal delayed from  MCA/INIT/NMI/PMI context?
-(p6)    br.cond.sptk.few .sigdelayed
-        ;;
         tbit.z p6,p0=r31,TIF_NEED_RESCHED               // current_thread_info()->need_resched==0?
 (p6)    br.cond.sptk.few .notify
 #ifdef CONFIG_PREEMPT
@@ -1129,17 +1126,6 @@ skip_rbs_switch:
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
         br.cond.sptk.many .work_processed_kernel        // don't re-check
 
-// There is a delayed signal that was detected in MCA/INIT/NMI/PMI context where
-// it could not be delivered.  Deliver it now.  The signal might be for us and
-// may set TIF_SIGPENDING, so redrive ia64_leave_* after processing the delayed
-// signal.
-
-.sigdelayed:
-        br.call.sptk.many rp=do_sigdelayed
-        cmp.eq p6,p0=r0,r0                              // p6 <- 1, always re-check
-(pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-        br.cond.sptk.many .work_processed_kernel        // re-check
-
 .work_pending_syscall_end:
         adds r2=PT(R8)+16,r12
         adds r3=PT(R10)+16,r12
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 463f6bb44d07..1d7903ee2126 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -588,104 +588,3 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
         }
         return 0;
 }
-
-/* Set a delayed signal that was detected in MCA/INIT/NMI/PMI context where it
- * could not be delivered.  It is important that the target process is not
- * allowed to do any more work in user space.  Possible cases for the target
- * process:
- *
- * - It is sleeping and will wake up soon.  Store the data in the current task,
- *   the signal will be sent when the current task returns from the next
- *   interrupt.
- *
- * - It is running in user context.  Store the data in the current task, the
- *   signal will be sent when the current task returns from the next interrupt.
- *
- * - It is running in kernel context on this or another cpu and will return to
- *   user context.  Store the data in the target task, the signal will be sent
- *   to itself when the target task returns to user space.
- *
- * - It is running in kernel context on this cpu and will sleep before
- *   returning to user context.  Because this is also the current task, the
- *   signal will not get delivered and the task could sleep indefinitely.
- *   Store the data in the idle task for this cpu, the signal will be sent
- *   after the idle task processes its next interrupt.
- *
- * To cover all cases, store the data in the target task, the current task and
- * the idle task on this cpu.  Whatever happens, the signal will be delivered
- * to the target task before it can do any useful user space work.  Multiple
- * deliveries have no unwanted side effects.
- *
- * Note: This code is executed in MCA/INIT/NMI/PMI context, with interrupts
- * disabled.  It must not take any locks nor use kernel structures or services
- * that require locks.
- */
-
-/* To ensure that we get the right pid, check its start time.  To avoid extra
- * include files in thread_info.h, convert the task start_time to unsigned long,
- * giving us a cycle time of > 580 years.
- */
-static inline unsigned long
-start_time_ul(const struct task_struct *t)
-{
-        return t->start_time.tv_sec * NSEC_PER_SEC + t->start_time.tv_nsec;
-}
-
-void
-set_sigdelayed(pid_t pid, int signo, int code, void __user *addr)
-{
-        struct task_struct *t;
-        unsigned long start_time =  0;
-        int i;
-
-        for (i = 1; i <= 3; ++i) {
-                switch (i) {
-                case 1:
-                        t = find_task_by_pid(pid);
-                        if (t)
-                                start_time = start_time_ul(t);
-                        break;
-                case 2:
-                        t = current;
-                        break;
-                default:
-                        t = idle_task(smp_processor_id());
-                        break;
-                }
-
-                if (!t)
-                        return;
-                task_thread_info(t)->sigdelayed.signo = signo;
-                task_thread_info(t)->sigdelayed.code = code;
-                task_thread_info(t)->sigdelayed.addr = addr;
-                task_thread_info(t)->sigdelayed.start_time = start_time;
-                task_thread_info(t)->sigdelayed.pid = pid;
-                wmb();
-                set_tsk_thread_flag(t, TIF_SIGDELAYED);
-        }
-}
-
-/* Called from entry.S when it detects TIF_SIGDELAYED, a delayed signal that
- * was detected in MCA/INIT/NMI/PMI context where it could not be delivered.
- */
-
-void
-do_sigdelayed(void)
-{
-        struct siginfo siginfo;
-        pid_t pid;
-        struct task_struct *t;
-
-        clear_thread_flag(TIF_SIGDELAYED);
-        memset(&siginfo, 0, sizeof(siginfo));
-        siginfo.si_signo = current_thread_info()->sigdelayed.signo;
-        siginfo.si_code = current_thread_info()->sigdelayed.code;
-        siginfo.si_addr = current_thread_info()->sigdelayed.addr;
-        pid = current_thread_info()->sigdelayed.pid;
-        t = find_task_by_pid(pid);
-        if (!t)
-                return;
-        if (current_thread_info()->sigdelayed.start_time != start_time_ul(t))
-                return;
-        force_sig_info(siginfo.si_signo, &siginfo, t);
-}