While adding error handling of genpd's ->attach_dev() callback, I realized that
we also had a need to re-structure some of the code which deals with
adding/removing devices to genpd. Especially the APIs, __pm_genpd_add_device()
and pm_genpd_remove_device() deserved some attention.

Patch 1 -> 4, can be considered as more simple cleanups and should not impact
the behavior for current clients using the APIs. 

Patch 5, eliminates a mutex for generic_pm_domain_data by re-order the
initialization/cleanup of dev_pm_qos notifiers.

Patch 6, move some code around to fix a potenial memory leakage of a struct
pm_subsys_data.

Patch 7, code restructuring which impacts locking behavior while adding/removing
devices. Should improve code readability and decrease critical regions of
holding locks.

Patch 8, Adds error handling of genpd's ->attach_dev() callback


Ulf Hansson (8):
  PM / Domains: Rename __pm_genpd_alloc|free_dev_data()
  PM / Domains: Remove reference counting for the generic_pm_domain_data
  PM / Domains: Don't allow an existing generic_pm_domain_data
  PM / Domains: Don't check for an existing device when adding a new
  PM / Domains: Eliminate the mutex for the generic_pm_domain_data
  PM / Domains: Free pm_subsys_data in error path in
    __pm_genpd_add_device()
  PM / Domains: Re-order initialization of generic_pm_domain_data
  PM / Domains: Handle errors from genpd's ->attach_dev() callback

 drivers/base/power/domain.c | 137 +++++++++++++++++++++-----------------------
 include/linux/pm_domain.h   |   2 -
 2 files changed, 65 insertions(+), 74 deletions(-)

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1.9.1