x86, NUMA: Enable build of generic NUMA init code on 32bit
Generic NUMA init code was moved to numa.c from numa_64.c but is still
guaraded by CONFIG_X86_64. This patch removes the compile guard and
enables compiling on 32bit.
* numa_add_memblk() and numa_set_distance() clash with the shim
implementation in numa_32.c and are left out.
* memory_add_physaddr_to_nid() clashes with 32bit implementation and
is left out.
* MAX_DMA_PFN definition in dma.h moved out of !CONFIG_X86_32.
* node_data definition in numa_32.c removed in favor of the one in
numa.c.
There are places where ulong is assumed to be 64bit. The next patch
will fix them up. Note that although the code is compiled it isn't
used yet and this patch doesn't cause any functional change.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
diff --git a/arch/x86/include/asm/dma.h b/arch/x86/include/asm/dma.h
index 057099e..d1a314b 100644
--- a/arch/x86/include/asm/dma.h
+++ b/arch/x86/include/asm/dma.h
@@ -69,6 +69,9 @@
#define MAX_DMA_CHANNELS 8
+/* 16MB ISA DMA zone */
+#define MAX_DMA_PFN ((16 * 1024 * 1024) >> PAGE_SHIFT)
+
#ifdef CONFIG_X86_32
/* The maximum address that we can perform a DMA transfer to on this platform */
@@ -76,9 +79,6 @@
#else
-/* 16MB ISA DMA zone */
-#define MAX_DMA_PFN ((16 * 1024 * 1024) >> PAGE_SHIFT)
-
/* 4GB broken PCI/AGP hardware bus master zone */
#define MAX_DMA32_PFN ((4UL * 1024 * 1024 * 1024) >> PAGE_SHIFT)
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index ed1daba..c400f3b 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -23,7 +23,6 @@
int __initdata numa_off;
nodemask_t numa_nodes_parsed __initdata;
-#ifdef CONFIG_X86_64
struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_data);
@@ -35,7 +34,6 @@
static int numa_distance_cnt;
static u8 *numa_distance;
-#endif
static __init int numa_setup(char *opt)
{
@@ -134,7 +132,6 @@
pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids);
}
-#ifdef CONFIG_X86_64
static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
struct numa_meminfo *mi)
{
@@ -176,6 +173,7 @@
(mi->nr_blks - idx) * sizeof(mi->blk[0]));
}
+#ifdef CONFIG_X86_64
/**
* numa_add_memblk - Add one numa_memblk to numa_meminfo
* @nid: NUMA node ID of the new memblk
@@ -191,6 +189,7 @@
{
return numa_add_memblk_to(nid, start, end, &numa_meminfo);
}
+#endif
/* Initialize bootmem allocator for a node */
static void __init
@@ -402,6 +401,7 @@
return 0;
}
+#ifdef CONFIG_X86_64
/**
* numa_set_distance - Set NUMA distance from one NUMA to another
* @from: the 'from' node to set distance
@@ -440,6 +440,7 @@
numa_distance[from * numa_distance_cnt + to] = distance;
}
+#endif
int __node_distance(int from, int to)
{
@@ -518,7 +519,6 @@
return 0;
}
-#endif
/*
* There are unfortunately some poorly designed mainboards around that
@@ -542,7 +542,6 @@
}
}
-#ifdef CONFIG_X86_64
static int __init numa_init(int (*init_func)(void))
{
int i;
@@ -627,7 +626,6 @@
numa_init(dummy_numa_init);
}
-#endif
static __init int find_near_online_node(int node)
{
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 14135e5..975a76f 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -41,9 +41,6 @@
#include <asm/bios_ebda.h>
#include <asm/proto.h>
-struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_data);
-
/*
* numa interface - we expect the numa architecture specific code to have
* populated the following initialisation.