From 4b1c81ea5671196c13cc056615413ce4d67eefe6 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Fri, 13 Apr 2012 08:51:42 +1000 Subject: [PATCH] mn10300: 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 Acked-by: David Howells Cc: Koichi Yasutake Cc: Al Viro Signed-off-by: Matt Fleming Signed-off-by: Andrew Morton --- arch/mn10300/kernel/signal.c | 32 ++++++++++---------------------- 1 file changed, 10 insertions(+), 22 deletions(-) diff --git a/arch/mn10300/kernel/signal.c b/arch/mn10300/kernel/signal.c index 690f4e9507d7..bd77c6d23a45 100644 --- a/arch/mn10300/kernel/signal.c +++ b/arch/mn10300/kernel/signal.c @@ -38,12 +38,13 @@ */ asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask) { - mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); + sigset_t blocked; + current->saved_sigmask = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + + mask &= _BLOCKABLE; + siginitset(&blocked, mask); + set_current_blocked(&blocked); current->state = TASK_INTERRUPTIBLE; schedule(); @@ -172,10 +173,7 @@ asmlinkage long sys_sigreturn(void) goto badframe; sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(current_frame(), &frame->sc, &d0)) goto badframe; @@ -203,10 +201,7 @@ asmlinkage long sys_rt_sigreturn(void) goto badframe; sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0)) goto badframe; @@ -476,15 +471,8 @@ static int handle_signal(int sig, else ret = setup_frame(sig, ka, oldset, regs); - if (ret == 0) { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, - &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } + if (ret == 0) + block_sigmask(ka, sig); return ret; } -- 2.39.5