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List:       util-linux-ng
Subject:    hwclock: RTC_UIE_ON on __x86_64__
From:       Karel Zak <kzak () redhat ! com>
Date:       2008-08-08 22:52:49
Message-ID: 20080808225249.GC8700 () nb ! net ! home
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util-linux-ng  hwclock/rtc.c:

#if defined(__alpha__) || defined(__sparc__) || defined(__x86_64__)
    /* Not all alpha kernels reject RTC_UIE_ON, but probably they should. */
    rc = -1;
    errno = EINVAL;
#else
    rc = ioctl(rtc_fd, RTC_UIE_ON, 0);
#endif


 Looks like a legacy. I think RTC framework can emulate RTC_UIE_*. At
 least on my x86_64 (rtc_cmos) with recent kernel it works. Is there
 any exclusion of an architecture/driver?

 Unfortunately, hwclock(8) uses a busy wait when RTC_UIE_ON is not
 available...

    Karel

-- 
 Karel Zak  <kzak@redhat.com>
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