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Subject[PATCH 29/40] score: Use set_current_blocked() and block_sigmask()
Date
From: Matt Fleming <matt.fleming@intel.com>

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.

Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
---
arch/score/kernel/signal.c | 15 +++------------
1 files changed, 3 insertions(+), 12 deletions(-)
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
index bf9e33e..5a5bd17 100644
--- a/arch/score/kernel/signal.c
+++ b/arch/score/kernel/signal.c
@@ -159,10 +159,7 @@ score_rt_sigreturn(struct pt_regs *regs)
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);

sig = restore_sigcontext(regs, &frame->rs_uc.uc_mcontext);
if (sig < 0)
@@ -272,14 +269,8 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
*/
ret = setup_rt_frame(ka, regs, sig, oldset, info);

- 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;
}
--
1.7.4.4


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