From: Martin Schwidefsky Date: Wed, 13 Jan 2010 19:44:27 +0000 (+0100) Subject: [S390] duplicate SIGTRAP on signal delivery. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6f50248ef0efa7453397eb53e41e8aa5df534492;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [S390] duplicate SIGTRAP on signal delivery. The code in do_signal sets the TIF_SINGLE_STEP bit and calls tracehook_signal_handler after the signal frame has been set up. This causes two SIGTRAP signals to be delivered to the tracer. Stop setting the TIF_SINGLE_STEP bit in do_signal to get the correct number of SIGTRAPs. Signed-off-by: Martin Schwidefsky --- diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index 6b4fef877f9d..1675c48b9145 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -499,19 +499,11 @@ void do_signal(struct pt_regs *regs) if (test_thread_flag(TIF_RESTORE_SIGMASK)) clear_thread_flag(TIF_RESTORE_SIGMASK); - /* - * If we would have taken a single-step trap - * for a normal instruction, act like we took - * one for the handler setup. - */ - if (current->thread.per_info.single_step) - set_thread_flag(TIF_SINGLE_STEP); - /* * Let tracing know that we've done the handler setup. */ tracehook_signal_handler(signr, &info, &ka, regs, - test_thread_flag(TIF_SINGLE_STEP)); + current->thread.per_info.single_step); } return; }