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authorMatt Fleming <matt.fleming@intel.com>2012-02-14 11:40:52 +0000
committerRalf Baechle <ralf@linux-mips.org>2012-04-27 00:12:47 +0100
commit8598f3cd80c860173d9b35d91c3dcb93eee13b54 (patch)
tree7597727791bb3daca9a4985b2103ddab34f6116b /arch/mips/kernel/signal.c
parent66f75a5d028beaf67c931435fdc3e7823125730c (diff)
MIPS: 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. Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: David Daney <ddaney@caviumnetworks.com> Cc: linux-mips@linux-mips.org Signed-off-by: Matt Fleming <matt.fleming@intel.com> Patchwork: https://patchwork.linux-mips.org/patch/3363/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/signal.c')
-rw-r--r--arch/mips/kernel/signal.c27
1 files changed, 5 insertions, 22 deletions
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 185ca00c4c84..d5a338a1739c 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -257,11 +257,8 @@ asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
@@ -286,11 +283,8 @@ asmlinkage int sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
@@ -362,10 +356,7 @@ asmlinkage void sys_sigreturn(nabi_no_regargs struct pt_regs regs)
goto badframe;
sigdelsetmask(&blocked, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = blocked;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&blocked);
sig = restore_sigcontext(&regs, &frame->sf_sc);
if (sig < 0)
@@ -401,10 +392,7 @@ asmlinkage void sys_rt_sigreturn(nabi_no_regargs 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)
@@ -580,12 +568,7 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
if (ret)
return ret;
- 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);
return ret;
}