On Tue, 8 Jan 2019, Nicolas Pitre wrote: > When VT_DISALLOCATE is used on a vt, user space waiting with poll() on > the corresponding /dev/vcs device is not awakened. This is now fixed by > returning POLLHUP|POLLERR to user space. > > Also, in the normal screen update case, we don't set POLLERR anymore as > POLLPRI alone is a much more logical response in a non-error situation, > saving some confusion on the user space side. The only known user app > making use of poll() on /dev/vcs* is BRLTTY which is known to cope with > that change already, so the risk of breakage is pretty much nonexistent. > > Signed-off-by: Nicolas Pitre <n...@linaro.org>
That patch introduced a small unwanted behavior change that I intend to fix in a follow-up patch (it will be tagged [PATCH 7/6]). I prefer to go with a separate patch rather than respinning this one as this gives me the opportunity to separately document said behavior. Nicolas
