Merge branch 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[sfrench/cifs-2.6.git] / arch / x86 / kernel / setup.c

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 5d9e40c58628ca2509c2e16718518dda9dac4149..5d7ba1a449bde18735d58777f3f510c04eaa5280 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -121,7 +121,9 @@
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
 
+#ifdef CONFIG_DMI
 RESERVE_BRK(dmi_alloc, 65536);
+#endif
 
 unsigned int boot_cpu_id __read_mostly;
 
@@ -667,6 +669,23 @@ static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
        {}
 };
 
+static void __init trim_bios_range(void)
+{
+       /*
+        * A special case is the first 4Kb of memory;
+        * This is a BIOS owned area, not kernel ram, but generally
+        * not listed as such in the E820 table.
+        */
+       e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
+       /*
+        * special case: Some BIOSen report the PC BIOS
+        * area (640->1Mb) as ram even though it is not.
+        * take them out.
+        */
+       e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
+       sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
+}
+
 /*
  * Determine if we were loaded by an EFI loader.  If so, then we have also been
  * passed the efi memmap, systab, etc., so we should use these data structures
@@ -830,7 +849,7 @@ void __init setup_arch(char **cmdline_p)
        insert_resource(&iomem_resource, &data_resource);
        insert_resource(&iomem_resource, &bss_resource);
 
-
+       trim_bios_range();
 #ifdef CONFIG_X86_32
        if (ppro_with_ram_bug()) {
                e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
@@ -950,15 +969,11 @@ void __init setup_arch(char **cmdline_p)
 #endif
 
        initmem_init(0, max_pfn, acpi, k8);
+#ifndef CONFIG_NO_BOOTMEM
+       early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
+#endif
 
-#ifdef CONFIG_X86_64
-       /*
-        * dma32_reserve_bootmem() allocates bootmem which may conflict
-        * with the crashkernel command line, so do that after
-        * reserve_crashkernel()
-        */
        dma32_reserve_bootmem();
-#endif
 
        reserve_ibft_region();