[PATCH] slab: fix handling of pages from foreign NUMA nodes

The numa slab allocator may allocate pages from foreign nodes onto the
lists for a particular node if a node runs out of memory.  Inspecting the
slab->nodeid field will not reflect that the page is now in use for the
slabs of another node.

This patch fixes that issue by adding a node field to free_block so that
the caller can indicate which node currently uses a slab.

Also removes the check for the current node from kmalloc_cache_node since
the process may shift later to another node which may lead to an allocation
on another node than intended.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>