• Paul Mackerras's avatar
    [PATCH] ppc32: support hotplug cpu on powermacs · 31139971
    Paul Mackerras authored
    This allows cpus to be off-lined on 32-bit SMP powermacs.  When a cpu
    is off-lined, it is put into sleep mode with interrupts disabled.  It
    can be on-lined again by asserting its soft-reset pin, which is
    connected to a GPIO pin.
    
    With this I can off-line the second cpu in my dual G4 powermac, which
    means that I can then suspend the machine (the suspend/resume code
    refuses to suspend if more than one cpu is online, and making it cope
    with multiple cpus is surprisingly messy).
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    31139971
idle.c 2.28 KB