[IA64] TS_RESTORE_SIGMASK

Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define
our own set_restore_sigmask() function.  This saves the costly
SMP-safe set_bit operation, which we do not need for the sigmask
flag since TIF_SIGPENDING always has to be set too.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 9 insertions, 8 deletions

diff --git a/arch/ia64/ia32/ia32_signal.c b/arch/ia64/ia32/ia32_signal.c
index 256a7faeda07..b763ca19ef17 100644
--- a/arch/ia64/ia32/ia32_signal.c
+++ b/arch/ia64/ia32/ia32_signal.c
@@ -463,7 +463,7 @@ sys32_sigsuspend (int history0, int history1, old_sigset_t mask)
 
         current->state = TASK_INTERRUPTIBLE;
         schedule();
-        set_thread_flag(TIF_RESTORE_SIGMASK);
+        set_restore_sigmask();
         return -ERESTARTNOHAND;
 }
 
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 5740296c35af..19c5a78636fc 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -464,7 +464,7 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
         if (!user_mode(&scr->pt))
                 return;
 
-        if (test_thread_flag(TIF_RESTORE_SIGMASK))
+        if (current_thread_info()->status & TS_RESTORE_SIGMASK)
                 oldset = &current->saved_sigmask;
         else
                 oldset = &current->blocked;
@@ -530,12 +530,13 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
                  * continue to iterate in this loop so we can deliver the SIGSEGV...
                  */
                 if (handle_signal(signr, &ka, &info, oldset, scr)) {
-                        /* a signal was successfully delivered; the saved
+                        /*
+                         * A signal was successfully delivered; the saved
                          * sigmask will have been stored in the signal frame,
                          * and will be restored by sigreturn, so we can simply
-                         * clear the TIF_RESTORE_SIGMASK flag */
-                        if (test_thread_flag(TIF_RESTORE_SIGMASK))
-                                clear_thread_flag(TIF_RESTORE_SIGMASK);
+                         * clear the TS_RESTORE_SIGMASK flag.
+                         */
+                        current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
                         return;
                 }
         }
@@ -566,8 +567,8 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
 
         /* if there's no signal to deliver, we just put the saved sigmask
          * back */
-        if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-                clear_thread_flag(TIF_RESTORE_SIGMASK);
+        if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+                current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
                 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
         }
 }