Hexagon: use set_current_blocked() and block_sigmask()

As described in e6fa16ab9c1e ("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: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index b45be3181193d2bfac1516ed7b58d9ec1bb26641..ecbab34576061a4036e9659340b55e64b8d2e5cc 100644 (file)
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -192,12 +192,7 @@ static int handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
        if (rc)
                return rc;
 
-       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);
+       block_sigmask(ka, sig);
 
        return 0;
 }
@@ -305,10 +300,7 @@ asmlinkage int sys_rt_sigreturn(void)
                goto badframe;
 
        sigdelsetmask(&blocked, ~_BLOCKABLE);
-       spin_lock_irq(&current->sighand->siglock);
-       current->blocked = blocked;
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+       set_current_blocked(&blocked);
 
        if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
                goto badframe;