x86: Make 64 bit use early_res instead of bootmem before slab

[net-next-2.6.git] / arch / x86 / mm / init_64.c

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5198b9bb34ef8eb86da0be3e6962a2456d4f9d64..53158b7e5d4659f5888c5352a8d5e65ac9024c8c 100644 (file)
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -49,6 +49,7 @@
 #include <asm/numa.h>
 #include <asm/cacheflush.h>
 #include <asm/init.h>
+#include <linux/bootmem.h>
 
 static unsigned long dma_reserve __initdata;
 
@@ -571,6 +572,7 @@ kernel_physical_mapping_init(unsigned long start,
 void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
                                int acpi, int k8)
 {
+#ifndef CONFIG_NO_BOOTMEM
        unsigned long bootmap_size, bootmap;
 
        bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
@@ -578,13 +580,15 @@ void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
                                 PAGE_SIZE);
        if (bootmap == -1L)
                panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+       reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
        /* don't touch min_low_pfn */
        bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
                                         0, end_pfn);
        e820_register_active_regions(0, start_pfn, end_pfn);
        free_bootmem_with_active_regions(0, end_pfn);
-       early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
-       reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
+#else
+       e820_register_active_regions(0, start_pfn, end_pfn);
+#endif
 }
 #endif
 
@@ -615,6 +619,21 @@ void __init paging_init(void)
  * Memory hotplug specific functions
  */
 #ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ * After memory hotplug the variables max_pfn, max_low_pfn and high_memory need
+ * updating.
+ */
+static void  update_end_of_memory_vars(u64 start, u64 size)
+{
+       unsigned long end_pfn = PFN_UP(start + size);
+
+       if (end_pfn > max_pfn) {
+               max_pfn = end_pfn;
+               max_low_pfn = end_pfn;
+               high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
+       }
+}
+
 /*
  * Memory is added always to NORMAL zone. This means you will never get
  * additional DMA/DMA32 memory.
@@ -634,6 +653,9 @@ int arch_add_memory(int nid, u64 start, u64 size)
        ret = __add_pages(nid, zone, start_pfn, nr_pages);
        WARN_ON_ONCE(ret);
 
+       /* update max_pfn, max_low_pfn and high_memory */
+       update_end_of_memory_vars(start, size);
+
        return ret;
 }
 EXPORT_SYMBOL_GPL(arch_add_memory);