While working on the poweroff handler implementation, I also started looking into pm_power_off_prepare. Ultimately, I concluded that it is not really necessary, and that it would be easy to remove.
The first patch in this series converts acpi to use a syscore callback instead of setting pm_power_off_prepare. Since acpi is the only user of pm_power_off_prepare, it is no longer used and removed with the second patch. Removing pm_power_off_prepare streamlines poweroff handling and makes it more uniform, so I think its removal would be worthwhile to consider. I am sending the series as RFC since I am not sure if I may be missing something. Compile tested only at this time; I'll do more testing if this sounds like a reasonable thing to do. On a side note, I don't see any callers of acpi_suspend(). I actually removed it as an experiment, and at least x86_64:allmodconfig still compiles. Can it be removed ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/

