On Thu, Jan 03, 2013 at 12:21:00PM +0000, Russell King - ARM Linux wrote: > This means we could have KEXEC select PM_SLEEP_SMP (and maybe PM_SLEEP) as > required, rather than bringing in the entire suspend support just to have > working kexec. > > However, how many platforms don't have suspend support enabled? I was looking into something similar to this for Kirkwood - my interest was in getting kexec to work, which means it needs to call the hibernation callbacks in the drivers prior to execing, otherwise there is a fairly high chance DMA will corrupt the kexec target. So this means the code needs the suspend support, however Kirkwood doesn't have any support for ARM_CPU_SUSPEND, which blocks enabling suspend at all for that platform. I was looking at moving the 'depends on CPU_..' from ARCH_SUSPEND_POSSIBLE to ARM_CPU_SUSPEND, which seemed to do the trick for kirkwood but I didn't study every possibility.. Regards, Jason
