cpumask: update irq_desc to use cpumask_var_t

Impact: reduce memory usage, use new cpumask API.

Replace the affinity and pending_masks with cpumask_var_t's.  This adds
to the significant size reduction done with the SPARSE_IRQS changes.

The added functions (init_alloc_desc_masks & init_copy_desc_masks) are
in the include file so they can be inlined (and optimized out for the
!CONFIG_CPUMASKS_OFFSTACK case.)  [Naming chosen to be consistent with
the other init*irq functions, as well as the backwards arg declaration
of "from, to" instead of the more common "to, from" standard.]

Includes a slight change to the declaration of struct irq_desc to embed
the pending_mask within ifdef(CONFIG_SMP) to be consistent with other
references, and some small changes to Xen.

Tested: sparse/non-sparse/cpumask_offstack/non-cpumask_offstack/nonuma/nosmp on x86_64

Signed-off-by: Mike Travis <[email protected]>
Cc: Chris Wright <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Venkatesh Pallipadi <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Yinghai Lu <[email protected]>

0 files changed, 0 insertions, 0 deletions