• Rafael J. Wysocki's avatar
    PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS · 1f112cee
    Rafael J. Wysocki authored
    Xen save/restore is going to use hibernate device callbacks for
    quiescing devices and putting them back to normal operations and it
    would need to select CONFIG_HIBERNATION for this purpose.  However,
    that also would cause the hibernate interfaces for user space to be
    enabled, which might confuse user space, because the Xen kernels
    don't support hibernation.  Moreover, it would be wasteful, as it
    would make the Xen kernels include a substantial amount of code that
    they would never use.
    
    To address this issue introduce new power management Kconfig option
    CONFIG_HIBERNATE_CALLBACKS, such that it will only select the code
    that is necessary for the hibernate device callbacks to work and make
    CONFIG_HIBERNATION select it.  Then, Xen save/restore will be able to
    select CONFIG_HIBERNATE_CALLBACKS without dragging the entire
    hibernate code along with it.
    Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
    Tested-by: default avatarShriram Rajagopalan <rshriram@cs.ubc.ca>
    1f112cee
manage.c 6.73 KB