1 files changed, 21 insertions, 34 deletions

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 49937a383b23..a3a34b4eb038 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -167,11 +167,18 @@ void tsk_clear_notify_resume(struct task_struct *tsk)
 	clear_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME);
 }
 
+/*
+ * do_notify_resume_user():
+ *	Called from notify_resume_user at entry.S, with interrupts disabled.
+ */
 void
-do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall)
+do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall)
 {
 	if (fsys_mode(current, &scr->pt)) {
-		/* defer signal-handling etc. until we return to privilege-level 0.  */
+		/*
+		 * defer signal-handling etc. until we return to
+		 * privilege-level 0.
+		 */
 		if (!ia64_psr(&scr->pt)->lp)
 			ia64_psr(&scr->pt)->lp = 1;
 		return;
@@ -179,16 +186,26 @@ do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall
 
 #ifdef CONFIG_PERFMON
 	if (current->thread.pfm_needs_checking)
+		/*
+		 * Note: pfm_handle_work() allow us to call it with interrupts
+		 * disabled, and may enable interrupts within the function.
+		 */
 		pfm_handle_work();
 #endif
 
 	/* deal with pending signal delivery */
-	if (test_thread_flag(TIF_SIGPENDING)||test_thread_flag(TIF_RESTORE_SIGMASK))
+	if (test_thread_flag(TIF_SIGPENDING)) {
+		local_irq_enable();	/* force interrupt enable */
 		ia64_do_signal(scr, in_syscall);
+	}
 
 	/* copy user rbs to kernel rbs */
-	if (unlikely(test_thread_flag(TIF_RESTORE_RSE)))
+	if (unlikely(test_thread_flag(TIF_RESTORE_RSE))) {
+		local_irq_enable();	/* force interrupt enable */
 		ia64_sync_krbs();
+	}
+
+	local_irq_disable();	/* force interrupt disable */
 }
 
 static int pal_halt        = 1;
@@ -625,21 +642,6 @@ do_dump_fpu (struct unw_frame_info *info, void *arg)
 	do_dump_task_fpu(current, info, arg);
 }
 
-int
-dump_task_regs(struct task_struct *task, elf_gregset_t *regs)
-{
-	struct unw_frame_info tcore_info;
-
-	if (current == task) {
-		unw_init_running(do_copy_regs, regs);
-	} else {
-		memset(&tcore_info, 0, sizeof(tcore_info));
-		unw_init_from_blocked_task(&tcore_info, task);
-		do_copy_task_regs(task, &tcore_info, regs);
-	}
-	return 1;
-}
-
 void
 ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
 {
@@ -647,21 +649,6 @@ ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
 }
 
 int
-dump_task_fpu (struct task_struct *task, elf_fpregset_t *dst)
-{
-	struct unw_frame_info tcore_info;
-
-	if (current == task) {
-		unw_init_running(do_dump_fpu, dst);
-	} else {
-		memset(&tcore_info, 0, sizeof(tcore_info));
-		unw_init_from_blocked_task(&tcore_info, task);
-		do_dump_task_fpu(task, &tcore_info, dst);
-	}
-	return 1;
-}
-
-int
 dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
 {
 	unw_init_running(do_dump_fpu, dst);