In order to safely remove PM domains there are a few changes that need to be made to ensure that no one is holding an external reference to a PM domain after it has been removed. One solution, implemented here, solves this by eliminating external references to PM domain. Changes from V1: - Added test when removing a PM domain to ensure the PM domain provider has been removed. - Re-organised patches 8-10 so that patch #8 adds the code to verify if the provider is present, patch #9 adds basic support for removing PM domains and patch #10 adds support for removing PM domains by provider. Changes from initial RFC: - Renamed functions made static per Ulf's feedback. - Added patch to clean-up provider/xlate APIs per Ulf's feedback - Re-worked and simplified the association between PM domains and PM domain providers. Dropped the 'provider_data' variable from the generic_pm_domain structure in favour of using the fwnode_handle. - Split patch for removing PM domains into multiple patches per Ulf's feedback. Jon Hunter (10): PM / Domains: Add new helper functions for device-tree ARM: EXYNOS: Remove calls to of_genpd_get_from_provider() staging: board: Remove calls to of_genpd_get_from_provider() PM / Domains: Don't expose generic_pm_domain structure to clients PM / Domains: Don't expose xlate and provider helper functions PM / Domains: Verify the PM domain is present when adding a provider PM / Domains: Prepare for adding support to remove PM domains PM / Domains: Store the provider in the PM domain structure PM / Domains: Add support for removing PM domains PM / Domains: Add support for removing nested PM domains by provider drivers/base/power/domain.c | 353 +++++++++++++++++++++++++++++++++++---- drivers/soc/samsung/pm_domains.c | 23 +-- drivers/staging/board/board.c | 9 +- include/linux/pm_domain.h | 74 ++++---- 4 files changed, 364 insertions(+), 95 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html