1. 24 3月, 2011 2 次提交
    • R
      timekeeping: Use syscore_ops instead of sysdev class and sysdev · e1a85b2c
      Rafael J. Wysocki 提交于
      The timekeeping subsystem uses a sysdev class and a sysdev for
      executing timekeeping_suspend() after interrupts have been turned off
      on the boot CPU (during system suspend) and for executing
      timekeeping_resume() before turning on interrupts on the boot CPU
      (during system resume).  However, since both of these functions
      ignore their arguments, the entire mechanism may be replaced with a
      struct syscore_ops object which is simpler.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
      e1a85b2c
    • R
      x86: Use syscore_ops instead of sysdev classes and sysdevs · f3c6ea1b
      Rafael J. Wysocki 提交于
      Some subsystems in the x86 tree need to carry out suspend/resume and
      shutdown operations with one CPU on-line and interrupts disabled and
      they define sysdev classes and sysdevs or sysdev drivers for this
      purpose.  This leads to unnecessarily complicated code and excessive
      memory usage, so switch them to using struct syscore_ops objects for
      this purpose instead.
      
      Generally, there are three categories of subsystems that use
      sysdevs for implementing PM operations: (1) subsystems whose
      suspend/resume callbacks ignore their arguments entirely (the
      majority), (2) subsystems whose suspend/resume callbacks use their
      struct sys_device argument, but don't really need to do that,
      because they can be implemented differently in an arguably simpler
      way (io_apic.c), and (3) subsystems whose suspend/resume callbacks
      use their struct sys_device argument, but the value of that argument
      is always the same and could be ignored (microcode_core.c).  In all
      of these cases the subsystems in question may be readily converted to
      using struct syscore_ops objects for power management and shutdown.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
      Acked-by: NIngo Molnar <mingo@elte.hu>
      f3c6ea1b
  2. 23 3月, 2011 38 次提交