• Rafael J. Wysocki's avatar
    [PATCH] Disable CPU hotplug during suspend · e3920fb4
    Rafael J. Wysocki authored
    The current suspend code has to be run on one CPU, so we use the CPU
    hotplug to take the non-boot CPUs offline on SMP machines.  However, we
    should also make sure that these CPUs will not be enabled by someone else
    after we have disabled them.
    
    The functions disable_nonboot_cpus() and enable_nonboot_cpus() are moved to
    kernel/cpu.c, because they now refer to some stuff in there that should
    better be static.  Also it's better if disable_nonboot_cpus() returns an
    error instead of panicking if something goes wrong, and
    enable_nonboot_cpus() has no reason to panic(), because the CPUs may have
    been enabled by the userland before it tries to take them online.
    Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
    Acked-by: default avatarPavel Machek <pavel@ucw.cz>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    e3920fb4
Makefile 248 Bytes