frv: use set_current_blocked() and block_sigmask()

As described in e6fa16ab ("signal: sigprocmask() should do
retarget_shared_pending()") the modification of current->blocked is
incorrect as we need to check whether the signal we're about to block is
pending in the shared queue.

Also, use the new helper function introduced in commit 5e6292c0f28f
("signal: add block_sigmask() for adding sigmask to current->blocked")
which centralises the code for updating current->blocked after
successfully delivering a signal and reduces the amount of duplicate code
across architectures.  In the past some architectures got this code wrong,
so using this helper function should stop that from happening again.

Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index df957c7ba387727067952f9c7c922fda518ecb9f..b46a8202979b7d4cdffcb6cf9cc0f8a3c612699d 100644 (file)
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -150,10 +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;
@@ -176,10 +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;
@@ -466,15 +460,8 @@ 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);
-       }
+       if (ret == 0)
+               block_sigmask(ka, sig);
 
        return ret;