x86: Make 64 bit use early_res instead of bootmem before slab
Finally we can use early_res to replace bootmem for x86_64 now.
Still can use CONFIG_NO_BOOTMEM to enable it or not.
-v2: fix 32bit compiling about MAX_DMA32_PFN
-v3: folded bug fix from LKML message below
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4B747239.4070907@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8deb9d0..78821a2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3435,6 +3435,59 @@
}
}
+int __init add_from_early_node_map(struct range *range, int az,
+ int nr_range, int nid)
+{
+ int i;
+ u64 start, end;
+
+ /* need to go over early_node_map to find out good range for node */
+ for_each_active_range_index_in_nid(i, nid) {
+ start = early_node_map[i].start_pfn;
+ end = early_node_map[i].end_pfn;
+ nr_range = add_range(range, az, nr_range, start, end);
+ }
+ return nr_range;
+}
+
+void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
+ u64 goal, u64 limit)
+{
+ int i;
+ void *ptr;
+
+ /* need to go over early_node_map to find out good range for node */
+ for_each_active_range_index_in_nid(i, nid) {
+ u64 addr;
+ u64 ei_start, ei_last;
+
+ ei_last = early_node_map[i].end_pfn;
+ ei_last <<= PAGE_SHIFT;
+ ei_start = early_node_map[i].start_pfn;
+ ei_start <<= PAGE_SHIFT;
+ addr = find_early_area(ei_start, ei_last,
+ goal, limit, size, align);
+
+ if (addr == -1ULL)
+ continue;
+
+#if 0
+ printk(KERN_DEBUG "alloc (nid=%d %llx - %llx) (%llx - %llx) %llx %llx => %llx\n",
+ nid,
+ ei_start, ei_last, goal, limit, size,
+ align, addr);
+#endif
+
+ ptr = phys_to_virt(addr);
+ memset(ptr, 0, size);
+ reserve_early_without_check(addr, addr + size, "BOOTMEM");
+ return ptr;
+ }
+
+ return NULL;
+}
+
+
void __init work_with_active_regions(int nid, work_fn_t work_fn, void *data)
{
int i;
@@ -4467,7 +4520,11 @@
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
-struct pglist_data __refdata contig_page_data = { .bdata = &bootmem_node_data[0] };
+struct pglist_data __refdata contig_page_data = {
+#ifndef CONFIG_NO_BOOTMEM
+ .bdata = &bootmem_node_data[0]
+#endif
+ };
EXPORT_SYMBOL(contig_page_data);
#endif