tree f2518be51a9b38a51eff1b48402b1306341dfddb
parent 4b97280675f45c1650ee4e388bd711ecbb18c4b4
author Nathan Fontenot <nfont@linux.vnet.ibm.com> 1380295089 -0500
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1380784898 +1000

powerpc: Fix memory hotplug with sparse vmemmap

Previous commit 46723bfa540... introduced a new config option
HAVE_BOOTMEM_INFO_NODE that ended up breaking memory hot-remove for ppc
when sparse vmemmap is not defined.

This patch defines HAVE_BOOTMEM_INFO_NODE for ppc and adds the call to
register_page_bootmem_info_node. Without this we get a BUG_ON for memory
hot remove in put_page_bootmem().

This also adds a stub for register_page_bootmem_memmap to allow ppc to build
with sparse vmemmap defined. Leaving this as a stub is fine since the same
vmemmap addresses are also handled in vmemmap_populate and as such are
properly mapped.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.9+]