From: Matt Fleming <matt.fleming@intel.com>
Date: Wed, 25 Apr 2012 01:03:54 +0000 (+1000)
Subject: parisc: use set_current_blocked() and block_sigmask()
X-Git-Tag: next-20120430~2^2~94
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c475f224eac0d1e413090413104b63c1c26acb2a;p=karo-tx-linux.git

parisc: 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 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: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 12c1ed33dc18..bd36152b780e 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -131,10 +131,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
 	}
 		
 	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-	current->blocked = set;
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	set_current_blocked(&set);
 
 	/* Good thing we saved the old gr[30], eh? */
 #ifdef CONFIG_64BIT
@@ -454,12 +451,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
 		return 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);
+	block_sigmask(ka, sig);
 
 	tracehook_signal_handler(sig, info, ka, regs, 
 		test_thread_flag(TIF_SINGLESTEP) ||