linux-kernel - Re: Why does timerfd() only support CLOCK_REALTIME and CLOCK

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Message-ID: <cfd18e0f0902081329j4b18c4f2g91269d3209f1932d@mail.gmail.com>
Date:	Mon, 9 Feb 2009 10:29:51 +1300
From:	Michael Kerrisk <mtk.manpages@...glemail.com>
To:	Davide Libenzi <davidel@...ilserver.org>
Cc:	"linux-man@...r.kernel.org" <linux-man@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Why does timerfd() only support CLOCK_REALTIME and 
	CLOCK_MONOTONIC?

> @@ -186,12 +187,9 @@ SYSCALL_DEFINE2(timerfd_create, int, clo
>        BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC);
>        BUILD_BUG_ON(TFD_NONBLOCK != O_NONBLOCK);
>
> -       if (flags & ~(TFD_CLOEXEC | TFD_NONBLOCK))
> +       if ((flags & ~TFD_FLAGS_SET) ||
> +           invalid_clockid(clockid))
>                return -EINVAL;

Oh!  Does this mean that in 2.6.2[789] it wasn't possible to use
TFD_TIMER_ABSTIME?

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
git://git.kernel.org/pub/scm/docs/man-pages/man-pages.git
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