From e6a585801b451443480ff66914a522b482457460 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Wed, 27 Apr 2011 21:04:28 +0200 Subject: [PATCH] x86: signal: handle_signal() should use set_current_blocked() This is ugly, but if sigprocmask() needs retarget_shared_pending() then handle signal should follow this logic. In theory it is newer correct to add the new signals to current->blocked, the signal handler can sleep/etc so we should notify other threads in case we block the pending signal and nobody else has TIF_SIGPENDING. Of course, this change doesn't make signals faster :/ Signed-off-by: Oleg Nesterov Reviewed-by: Matt Fleming Acked-by: Tejun Heo --- arch/x86/kernel/signal.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 4fd173cd8e57..5a8f5e68bb61 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -682,6 +682,7 @@ static int handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, sigset_t *oldset, struct pt_regs *regs) { + sigset_t blocked; int ret; /* Are we from a system call? */ @@ -741,12 +742,10 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, */ regs->flags &= ~X86_EFLAGS_TF; - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); + sigorsets(&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); + sigaddset(&blocked, sig); + set_current_blocked(&blocked); tracehook_signal_handler(sig, info, ka, regs, test_thread_flag(TIF_SINGLESTEP));