linux-kernel - [PATCH 21/41] OpenRISC: Use set_current

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Date:	Thu, 11 Aug 2011 14:56:55 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Jonas Bonn <jonas@...thpole.se>,
	Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 21/41] OpenRISC: Use set_current_blocked()

From: Matt Fleming <matt.fleming@...el.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.

Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Jonas Bonn <jonas@...thpole.se>
Cc: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Matt Fleming <matt.fleming@...el.com>
---
 arch/openrisc/kernel/signal.c |   15 +++++----------
 1 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c
index b0bdfda..50a5156 100644
--- a/arch/openrisc/kernel/signal.c
+++ b/arch/openrisc/kernel/signal.c
@@ -108,10 +108,7 @@ asmlinkage long _sys_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);
 
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
@@ -266,19 +263,17 @@ handle_signal(unsigned long sig,
 	      siginfo_t *info, struct k_sigaction *ka,
 	      sigset_t *oldset, struct pt_regs *regs)
 {
+	sigset_t blocked;
 	int ret;
 
 	ret = setup_rt_frame(sig, ka, info, oldset, regs);
 	if (ret)
 		return ret;
 
-	spin_lock_irq(&current->sighand->siglock);
-	sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
+	sigorsets(&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);
+		sigaddset(&blocked, sig);
+	set_current_blocked(&blocked);
 
 	return 0;
 }
-- 
1.7.4.4

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