On Sat, 7 May 2011 10:34:25 +0200, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
On Thu, May 5, 2011 at 22:39, Mikael Pettersson <mikpe@xxxxxxxx> wrote:
Geert Uytterhoeven writes:
=C2=A0> On Thu, 5 May 2011, Arnd Bergmann wrote:
=C2=A0> > Did you check the macros in unistd to see if they match the
=C2=A0> > actual table? I guess it would be a good time to comment out
=C2=A0> > the ones that are not implemented in either of the two ABIs.
=C2=A0>
=C2=A0> Like this?
=C2=A0>
=C2=A0> warning: #warning syscall pselect6 not implemented
=C2=A0> warning: #warning syscall ppoll not implemented
=C2=A0> warning: #warning syscall recvmmsg not implemented
=C2=A0>
=C2=A0> Do we need pselect6 and ppoll? I have vague memories not requirin=
g it.
They close user-space race conditions, so you want them.
So do you recommend to backport the wiring up of pselect6/ppoll to -stable?
We always had their _NR_* defines, so I guess glibc was always compiled
with pselect6/ppoll support, and will use it if it's present.
Any kernel with working TIF_RESTORE_SIGMASK should ideally also
wire up pselect6/ppoll. But their omission is not a regression
so backporting to 2.6.38 is probably sufficient.
/Mikael
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