kexec: add BSS to resource tree
[linux-2.6.git] / arch / x86 / kernel / e820_32.c
index 3c86b97..18f500d 100644 (file)
@@ -51,6 +51,13 @@ struct resource code_resource = {
        .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
 };
 
+struct resource bss_resource = {
+       .name   = "Kernel bss",
+       .start  = 0,
+       .end    = 0,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
 static struct resource system_rom_resource = {
        .name   = "System ROM",
        .start  = 0xf0000,
@@ -254,7 +261,9 @@ static void __init probe_roms(void)
  * and also for regions reported as reserved by the e820.
  */
 static void __init
-legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
+legacy_init_iomem_resources(struct resource *code_resource,
+                           struct resource *data_resource,
+                           struct resource *bss_resource)
 {
        int i;
 
@@ -287,8 +296,10 @@ legacy_init_iomem_resources(struct resource *code_resource, struct resource *dat
                         */
                        request_resource(res, code_resource);
                        request_resource(res, data_resource);
+                       request_resource(res, bss_resource);
 #ifdef CONFIG_KEXEC
-                       request_resource(res, &crashk_res);
+                       if (crashk_res.start != crashk_res.end)
+                               request_resource(res, &crashk_res);
 #endif
                }
        }
@@ -306,9 +317,11 @@ static int __init request_standard_resources(void)
 
        printk("Setting up standard PCI resources\n");
        if (efi_enabled)
-               efi_initialize_iomem_resources(&code_resource, &data_resource);
+               efi_initialize_iomem_resources(&code_resource,
+                               &data_resource, &bss_resource);
        else
-               legacy_init_iomem_resources(&code_resource, &data_resource);
+               legacy_init_iomem_resources(&code_resource,
+                               &data_resource, &bss_resource);
 
        /* EFI systems may still have VGA */
        request_resource(&iomem_resource, &video_ram_resource);
@@ -705,7 +718,7 @@ void __init e820_register_memory(void)
        int i;
 
        /*
-        * Search for the bigest gap in the low 32 bits of the e820
+        * Search for the biggest gap in the low 32 bits of the e820
         * memory space.
         */
        last = 0x100000000ull;