m68k/mm: Set all online nodes in N_NORMAL_MEMORY

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>
CC: stable@kernel.org

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 02b7a03e4226..8b3db1c587fc 100644
--- 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);
         }
 }