linux-kernel - [PATCH 04/40] avr32: use set_current_blocked() in handle_signal/sys_rt

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Date:	Tue, 14 Feb 2012 11:40:37 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	linux-arch@...r.kernel.org
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Hans-Christian Egtvedt <egtvedt@...fundet.no>
Subject: [PATCH 04/40] avr32: use set_current_blocked() in handle_signal/sys_rt_sigreturn

From: Oleg Nesterov <oleg@...hat.com>

It is wrong to change ->blocked directly, see e6fa16ab.
Change  handle_signal() and sys_rt_sigreturn() to use
the right helper, set_current_blocked().

Cc: Hans-Christian Egtvedt <egtvedt@...fundet.no>
Acked-by: Havard Skinnemoen <hskinnemoen@...il.com>
Reviewed-by: Matt Fleming <matt.fleming@...el.com>
Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
 arch/avr32/kernel/signal.c |   15 +++++----------
 1 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c
index 9c075e1..06f4293 100644
--- a/arch/avr32/kernel/signal.c
+++ b/arch/avr32/kernel/signal.c
@@ -87,10 +87,7 @@ asmlinkage int 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;
@@ -226,6 +223,7 @@ static inline void
 handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 	      sigset_t *oldset, struct pt_regs *regs, int syscall)
 {
+	sigset_t blocked;
 	int ret;
 
 	/*
@@ -246,13 +244,10 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 	/*
 	 * Block the signal if we were successful.
 	 */
-	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);
 }
 
 /*
-- 
1.7.4.4

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