[PATCH RT 0/5] preempt_disable/enable -> migrate_disable/enablepushdown proposals

[Nicholas Mc Guire]

a small series of preempt_disable/enable -> migrate_disable/enable pushdown 
proposals

In mainline a number of preempt_disable/enable are actually topology control 
and not actual concurrency control - these cases can be pushed down to a 
preemptible migrate_disable/enable. 

This little series contains a few pushdowns from preempt_disable to 
migrate_disable where code pattern scans using cocci scripts suggested this 
to be possible. The cases detected were then reviewed and tested with the 
migrate_disable/enable respectively with the preempt_disable/enable 
completely removed in one case.

Testing was done but is of very limited use for locking/migration related
issues, so a review of the code analysis/rational is requested along with
additional testing.

thx!
hofrat
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