[patch 0/8] Create and Use common mempool allocators (Take 2)

[Matthew Dobson <colpatch@us.ibm.com>]

--
In the course of working on some patches to implement subsystem-wide critical
pools through the existing mempool API, I created the following patches which
create 3 new common mempool allocators (mempool_alloc_pages, mempool_kmalloc &
mempool_kzalloc) and freers.  The following 6 patches add these new common
allocators and convert existing mempool users to use these common allocators,
where possible.  Optionally, the last 2 patches in this series add and use a
wrapper for the common case of creating a slab-based mempool.

After the application of these patches there are only 4 places where
'non-common' allocators are used (drivers/md/raid1.c & raid10.c, mm/highmem.c
and drivers/scsi/scsi_transport_iscsi.c), and all of these are non-trivial
allocators.  The sum of these patches is a reduction of 90 lines of kernel
code and the removal of many nearly identical mempool allocators.

New since Take 1:
* Added 4 mempool_create() wrappers to avoid both gratuitous casting
   and gratuitous cast warnings.
* Update to 2.6.16-rc1-mm4

Thanks!

-Matt

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