m68k/mm: Set all online nodes in N_NORMAL_MEMORY

BugLink: http://bugs.launchpad.net/bugs/775809

commit 4aac0b4815ba592052758f4b468f253d383dc9d6 upstream.

For m68k, N_NORMAL_MEMORY represents all nodes that have present memory
since it does not support HIGHMEM.  This patch sets the bit at the time
node_present_pages has been set by free_area_init_node.
At the time the node is brought online, the node state would have to be
done unconditionally since information about present memory has not yet
been recorded.

If N_NORMAL_MEMORY is not accurate, slub may encounter errors since it
uses this nodemask to setup per-cache kmem_cache_node data structures.

This pach is an alternative to the one proposed by David Rientjes
<rientjes@google.com> attempting to set node state immediately when
bringing the node online.

Signed-off-by: Michael Schmitz <schmitz@debian.org>
Tested-by: Thorsten Glaser <tg@debian.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 02b7a03..8b3db1c 100644 (file)
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -300,6 +300,8 @@ void __init paging_init(void)
                zones_size[ZONE_DMA] = m68k_memory[i].size >> PAGE_SHIFT;
                free_area_init_node(i, zones_size,
                                    m68k_memory[i].addr >> PAGE_SHIFT, NULL);
+               if (node_present_pages(i))
+                       node_set_state(i, N_NORMAL_MEMORY);
        }
 }