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    SubjectRe: /sys/devices/system/cpu/cpuX/online are missing
    On Sun, Mar 11, 2007 at 10:26:52PM +0100, Giuliano Pochini wrote:
    > Since 2.6.20 /sys/devices/system/cpu/cpuX/online isn't there anymore. The
    > directories exist, though. I also tested linux-2.6.21rc3. I had a look at the
    > archives and I found nothing about the removal of that file, which is still
    > documented in Documentation/cpu-hotplug.txt. I don't know if other
    > architectures are affected.
    > $ uname -a
    > Linux Jay 2.6.20 #1 SMP Mon Feb 5 22:42:18 CET 2007 ppc 7455, altivec supported PowerMac3,6 GNU/Linux
    > No cpusets. CONFIG_HOTPLUG_CPU=y

    Somebody inverted the logic when and if the 'online' attribute for cpu devices
    appear. See 72486f1f8f0a2bc828b9d30cf4690cf2dd6807fc.
    The fix for s390 is this: 6721f77810dfcb7cbf8e97be6fa43fe2740dd0aa.
    Looks like arch/ppc was left out as well.
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