• Nathan Fontenot's avatar
    powerpc: Fix memory hotplug with sparse vmemmap · f7e3334a
    Nathan Fontenot authored
    Previous commit 46723bfa... 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: default avatarNathan Fontenot <nfont@linux.vnet.ibm.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    CC: <stable@vger.kernel.org> [v3.9+]
    f7e3334a
Kconfig 18.7 KB