TIF_RESTORE_SIGMASK can be set only when TIF_SIGPENDING is set

[deliverable/linux.git] / arch / frv / kernel / signal.c

diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index bab01298b58ee2873fd7ef85de9230ac7af354f7..9ec3d2e27b4c23ace494465b137ff382aa3d75c0 100644 (file)
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -40,17 +40,9 @@ struct fdpic_func_descriptor {
  */
 asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
 {
-       mask &= _BLOCKABLE;
-       spin_lock_irq(&current->sighand->siglock);
-       current->saved_sigmask = current->blocked;
-       siginitset(&current->blocked, mask);
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
-
-       current->state = TASK_INTERRUPTIBLE;
-       schedule();
-       set_thread_flag(TIF_RESTORE_SIGMASK);
-       return -ERESTARTNOHAND;
+       sigset_t blocked;
+       siginitset(&blocked, mask);
+       return sigsuspend(&blocked);
 }
 
 asmlinkage int sys_sigaction(int sig,
@@ -64,10 +56,10 @@ asmlinkage int sys_sigaction(int sig,
                old_sigset_t mask;
                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
                    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-                   __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+                   __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+                   __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+                   __get_user(mask, &act->sa_mask))
                        return -EFAULT;
-               __get_user(new_ka.sa.sa_flags, &act->sa_flags);
-               __get_user(mask, &act->sa_mask);
                siginitset(&new_ka.sa.sa_mask, mask);
        }
 
@@ -76,10 +68,10 @@ asmlinkage int sys_sigaction(int sig,
        if (!ret && oact) {
                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
                    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-                   __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+                   __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+                   __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+                   __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
                        return -EFAULT;
-               __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-               __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
        }
 
        return ret;
@@ -158,10 +150,7 @@ asmlinkage int sys_sigreturn(void)
                goto badframe;
 
        sigdelsetmask(&set, ~_BLOCKABLE);
-       spin_lock_irq(&current->sighand->siglock);
-       current->blocked = set;
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+       set_current_blocked(&set);
 
        if (restore_sigcontext(&frame->sc, &gr8))
                goto badframe;
@@ -184,10 +173,7 @@ asmlinkage int sys_rt_sigreturn(void)
                goto badframe;
 
        sigdelsetmask(&set, ~_BLOCKABLE);
-       spin_lock_irq(&current->sighand->siglock);
-       current->blocked = set;
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+       set_current_blocked(&set);
 
        if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
                goto badframe;
@@ -440,9 +426,10 @@ give_sigsegv:
 /*
  * OK, we're invoking a handler
  */
-static int handle_signal(unsigned long sig, siginfo_t *info,
-                        struct k_sigaction *ka, sigset_t *oldset)
+static void handle_signal(unsigned long sig, siginfo_t *info,
+                        struct k_sigaction *ka)
 {
+       sigset_t *oldset = sigmask_to_save();
        int ret;
 
        /* Are we from a system call? */
@@ -474,18 +461,12 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
        else
                ret = setup_frame(sig, ka, oldset);
 
-       if (ret == 0) {
-               spin_lock_irq(&current->sighand->siglock);
-               sigorsets(&current->blocked, &current->blocked,
-                         &ka->sa.sa_mask);
-               if (!(ka->sa.sa_flags & SA_NODEFER))
-                       sigaddset(&current->blocked, sig);
-               recalc_sigpending();
-               spin_unlock_irq(&current->sighand->siglock);
-       }
-
-       return ret;
+       if (ret)
+               return;
 
+       block_sigmask(ka, sig);
+       tracehook_signal_handler(sig, info, ka, __frame,
+                                test_thread_flag(TIF_SINGLESTEP));
 } /* end handle_signal() */
 
 /*****************************************************************************/
@@ -510,32 +491,12 @@ static void do_signal(void)
        if (!user_mode(__frame))
                return;
 
-       if (try_to_freeze())
-               goto no_signal;
-
-       if (test_thread_flag(TIF_RESTORE_SIGMASK))
-               oldset = &current->saved_sigmask;
-       else
-               oldset = &current->blocked;
-
        signr = get_signal_to_deliver(&info, &ka, __frame, NULL);
        if (signr > 0) {
-               if (handle_signal(signr, &info, &ka, oldset) == 0) {
-                       /* 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);
-
-                       tracehook_signal_handler(signr, &info, &ka, __frame,
-                                                test_thread_flag(TIF_SINGLESTEP));
-               }
-
+               handle_signal(signr, &info, &ka);
                return;
        }
 
-no_signal:
        /* Did we come from a system call? */
        if (__frame->syscallno != -1) {
                /* Restart the system call - no handlers present */
@@ -557,11 +518,7 @@ no_signal:
 
        /* 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);
-               sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-       }
-
+       restore_saved_sigmask();
 } /* end do_signal() */
 
 /*****************************************************************************/
@@ -576,15 +533,13 @@ asmlinkage void do_notify_resume(__u32 thread_info_flags)
                clear_thread_flag(TIF_SINGLESTEP);
 
        /* deal with pending signal delivery */
-       if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+       if (thread_info_flags & _TIF_SIGPENDING))
                do_signal();
 
        /* deal with notification on about to resume userspace execution */
        if (thread_info_flags & _TIF_NOTIFY_RESUME) {
                clear_thread_flag(TIF_NOTIFY_RESUME);
                tracehook_notify_resume(__frame);
-               if (current->replacement_session_keyring)
-                       key_replace_session_keyring();
        }
 
 } /* end do_notify_resume() */