h8300: 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 block_sigmask() 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.

Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>

diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index af842c369d24301e4b38861d29ffae2df0f863e7..cd63f5a6c8fe9d3ad6a77f05d63a12d7cecd612a 100644 (file)
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -57,14 +57,13 @@ asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
 asmlinkage int do_sigsuspend(struct pt_regs *regs)
 {
        old_sigset_t mask = regs->er3;
-       sigset_t saveset;
+       sigset_t saveset, blocked;
 
-       mask &= _BLOCKABLE;
-       spin_lock_irq(&current->sighand->siglock);
        saveset = current->blocked;
-       siginitset(&current->blocked, mask);
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+
+       mask &= _BLOCKABLE;
+       siginitset(&blocked, mask);
+       set_current_blocked(&blocked);
 
        regs->er0 = -EINTR;
        while (1) {
@@ -90,11 +89,8 @@ do_rt_sigsuspend(struct pt_regs *regs)
                return -EFAULT;
        sigdelsetmask(&newset, ~_BLOCKABLE);
 
-       spin_lock_irq(&current->sighand->siglock);
        saveset = current->blocked;
-       current->blocked = newset;
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+       set_current_blocked(&newset);
 
        regs->er0 = -EINTR;
        while (1) {
@@ -232,10 +228,7 @@ asmlinkage int do_sigreturn(unsigned long __unused,...)
                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(regs, &frame->sc, &er0))
                goto badframe;
@@ -260,10 +253,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
                goto badframe;
 
        sigdelsetmask(&set, ~_BLOCKABLE);
-       spin_unlock_irq(&current->sighand->siglock);
-       current->blocked = set;
-       recalc_sigpending();
-       spin_lock_irq(&current->sighand->siglock);
+       set_current_blocked(&set);
        
        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &er0))
                goto badframe;
@@ -489,12 +479,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
        else
                setup_frame(sig, ka, oldset, regs);
 
-       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);
 }
 
 /*