RFC PM / Domains: Add support for removing PM domains

Hi Uffe,

Quoted 29 lines · Ulf Hansson

Quoted 27 lines · Jon Hunter

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. Another alternative would be to employ some reference counting for the PM domains, however, I did not see a good reason for allowing external references in the first place (as always there could be something that I have over-looked!).

Jon Hunter (8):
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
PM / Domains: Verify the PM domain is present when adding a provider PM / Domains: Remove a provider by referencing the data pointer PM / Domains: Prepare for adding support to remove PM domains PM / Domains: Add support for removing PM domains

 arch/arm/mach-exynos/pm_domains.c |  23 +--
 drivers/base/power/domain.c       | 324 +++++++++++++++++++++++++++++++++++---
 drivers/staging/board/board.c     |   9 +-
 include/linux/pm_domain.h         |  55 ++++---
 4 files changed, 348 insertions(+), 63 deletions(-)

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2.1.4

Quoted 4 lines

Jon, thanks for posting this!
My initial impressions is the I like the ideas for where you moves this.

I will review it in more details as soon as I can (travelling next week).

Just wanted to see if you have had chance to look at this yet? Not urgent.