We already get the ti_work passed in arch_do_signal(), define TIF_NOTIFY_SIGNAL and take the appropriate action in the signal handling based on _TIF_NOTIFY_SIGNAL and _TIF_SIGPENDING being set.
Signed-off-by: Jens Axboe <[email protected]> --- arch/x86/include/asm/thread_info.h | 2 ++ arch/x86/kernel/signal.c | 5 ++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index 267701ae3d86..86ade67f21b7 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -93,6 +93,7 @@ struct thread_info { #define TIF_NOTSC 16 /* TSC is not accessible in userland */ #define TIF_IA32 17 /* IA32 compatibility process */ #define TIF_SLD 18 /* Restore split lock detection on context switch */ +#define TIF_NOTIFY_SIGNAL 19 /* signal notifications exist */ #define TIF_MEMDIE 20 /* is terminating due to OOM killer */ #define TIF_POLLING_NRFLAG 21 /* idle is polling for TIF_NEED_RESCHED */ #define TIF_IO_BITMAP 22 /* uses I/O bitmap */ @@ -123,6 +124,7 @@ struct thread_info { #define _TIF_NOTSC (1 << TIF_NOTSC) #define _TIF_IA32 (1 << TIF_IA32) #define _TIF_SLD (1 << TIF_SLD) +#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP) #define _TIF_FORCED_TF (1 << TIF_FORCED_TF) diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index d18304e84c09..ec6490e53dc3 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -808,7 +808,10 @@ void arch_do_signal(struct pt_regs *regs, unsigned long ti_work) { struct ksignal ksig; - if (get_signal(&ksig)) { + if (ti_work & _TIF_NOTIFY_SIGNAL) + tracehook_notify_signal(); + + if ((ti_work & _TIF_SIGPENDING) && get_signal(&ksig)) { /* Whee! Actually deliver the signal. */ handle_signal(&ksig, regs); return; -- 2.28.0
