powerpc/mm: Always update max/min_low_pfn in mem_topology_setup()

commit 7b31f7dadd7074fa70bb14a53bd286ffdfc98b04 upstream.

For both CONFIG_NUMA enabled/disabled use mem_topology_setup() to
update max/min_low_pfn.

This also adds min_low_pfn update to CONFIG_NUMA which was initialized
to zero before. (mpe: Though MEMORY_START is == 0 for PPC64=y which is
all possible NUMA=y systems)

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220704063851.295482-1-aneesh.kumar@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index ce8569e16f0c45cd0c6d73c40e69d655d8b6cd7e..96b3e31ee0f3d4ecdc0edbd1a39914579e235168 100644 (file)
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1177,6 +1177,9 @@ void __init mem_topology_setup(void)
 {
        int cpu;
 
+       max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
+       min_low_pfn = MEMORY_START >> PAGE_SHIFT;
+
        /*
         * Linux/mm assumes node 0 to be online at boot. However this is not
         * true on PowerPC, where node 0 is similar to any other node, it
@@ -1221,9 +1224,6 @@ void __init initmem_init(void)
 {
        int nid;
 
-       max_low_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
-       max_pfn = max_low_pfn;
-
        memblock_dump_all();
 
        for_each_online_node(nid) {