[CPUFREQ] Rewrite lock in cpufreq to eliminate cpufreq/hotplug related issues

Yet another attempt to resolve cpufreq and hotplug locking issues.

Patchset has 3 patches:
* Rewrite the lock infrastructure of cpufreq using a per cpu rwsem.
* Minor restructuring of work callback in ondemand driver.
* Use the new cpufreq rwsem infrastructure in ondemand work.

This patch:

Convert policy->lock to rwsem and move it to per_cpu area.
This rwsem will protect against both changing/accessing policy
related parameters and CPU hot plug/unplug.

[[email protected]: fix oops in kref_put()]
Cc: Gautham R Shenoy <[email protected]>
Signed-off-by: Venkatesh Pallipadi <[email protected]>
Cc: Gautham R Shenoy <[email protected]>
Signed-off-by: Mattia Dongili <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Dave Jones <[email protected]>

0 files changed, 0 insertions, 0 deletions