• Mike Travis's avatar
    cpumask: update irq_desc to use cpumask_var_t · 7f7ace0c
    Mike Travis authored
    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: default avatarMike Travis <travis@sgi.com>
    Cc: Chris Wright <chrisw@sous-sol.org>
    Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
    Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
    Cc: virtualization@lists.osdl.org
    Cc: xen-devel@lists.xensource.com
    Cc: Yinghai Lu <yhlu.kernel@gmail.com>
    7f7ace0c
handle.c 10.4 KB