The code I inherited in ibm-acpi does heavy caching of acpi_get_handle() results. It stores the results of acpi_get_handle() for a number of nodes at module init, and uses the stored results during its lifetime. Is that a valid use of the handles returned by acpi_get_handle()? In particular, what happens to handlers when a SSDT gets loaded or unloaded at runtime? Do handles that came from the DSDT change? What if the handler was to a node in the SSDT being unloaded? What if the handler is overriden by a new loaded SSDT? While the vast majority of the handlers ibm-acpi caches are in the DSDT and very unlikely to change through a SSDT load, I'd still like to make sure the driver is doing the right thing... PS: not caching the results is always possible, but that will mean various calls to acpi_get_handle() per second. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
