On Wed, Jan 31, 2018 at 08:41:39AM +0000, Eugene Syromyatnikov wrote: > On Wed, Jan 31, 2018 at 7:20 AM, Heiko Carstens > <heiko.carstens@xxxxxxxxxx> wrote: > > @@ -85,6 +91,12 @@ The run-time instrumentation facility is available beginning with System z EC12. > > Glibc does not provide a wrapper for this system call, use > > .BR syscall (2) > > to call it. > > +.PP > > +Support for signalling was removed with Linux 4.4. With Linux 4.4 > > +also the check if > > +.IR signum > > +is a valid real-time signal was removed. For backwards compatibility with old > > +kernels it is recommended to pass a valid real-time signal number. > I would recommend passing 0 instead, as passing non-zero signal number > implies that the userspace process expects to receive this signal in > the future in case of aforementioned events, and this will not happen > on Linux 4.4 onwards. Passing 0 as signum is not backwards compatible, since that will result in an error with old kernels. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
