x86: clean up e820_reserve_resources on 64-bit

e820_resource_resources could use insert_resource instead of request_resource
also move code_resource, data_resource, bss_resource, and crashk_res
out of e820_reserve_resources.
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/e820_64.c

@@ -229,8 +229,7 @@ unsigned long __init e820_end_of_ram(void)
 /*
  * Mark e820 reserved areas as busy for the resource manager.
  */
-void __init e820_reserve_resources(struct resource *code_resource,
-		struct resource *data_resource, struct resource *bss_resource)
+void __init e820_reserve_resources(void)
 {
 	int i;
 	for (i = 0; i < e820.nr_map; i++) {
@@ -245,21 +244,7 @@ void __init e820_reserve_resources(struct resource *code_resource,
 		res->start = e820.map[i].addr;
 		res->end = res->start + e820.map[i].size - 1;
 		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
-		request_resource(&iomem_resource, res);
-		if (e820.map[i].type == E820_RAM) {
-			/*
-			 * We don't know which RAM region contains kernel data,
-			 * so we try it repeatedly and let the resource manager
-			 * test it.
-			 */
-			request_resource(res, code_resource);
-			request_resource(res, data_resource);
-			request_resource(res, bss_resource);
-#ifdef CONFIG_KEXEC
-			if (crashk_res.start != crashk_res.end)
-				request_resource(res, &crashk_res);
-#endif
-		}
+		insert_resource(&iomem_resource, res);
 	}
 }
 

arch/x86/kernel/setup_64.c

@@ -248,6 +248,7 @@ static void __init reserve_crashkernel(void)
 				(unsigned long)(total_mem >> 20));
 		crashk_res.start = crash_base;
 		crashk_res.end   = crash_base + crash_size - 1;
+		insert_resource(&iomem_resource, &crashk_res);
 	}
 }
 #else
@@ -322,6 +323,11 @@ void __init setup_arch(char **cmdline_p)
 
 	finish_e820_parsing();
 
+	/* after parse_early_param, so could debug it */
+	insert_resource(&iomem_resource, &code_resource);
+	insert_resource(&iomem_resource, &data_resource);
+	insert_resource(&iomem_resource, &bss_resource);
+
 	early_gart_iommu_check();
 
 	e820_register_active_regions(0, 0, -1UL);
@@ -454,7 +460,7 @@ void __init setup_arch(char **cmdline_p)
 	/*
 	 * We trust e820 completely. No explicit ROM probing in memory.
 	 */
-	e820_reserve_resources(&code_resource, &data_resource, &bss_resource);
+	e820_reserve_resources();
 	e820_mark_nosave_regions();
 
 	/* request I/O space for devices used on all i[345]86 PCs */

include/asm-x86/e820_64.h

@@ -23,8 +23,7 @@ extern void update_memory_range(u64 start, u64 size, unsigned old_type,
 extern void setup_memory_region(void);
 extern void contig_e820_setup(void); 
 extern unsigned long e820_end_of_ram(void);
-extern void e820_reserve_resources(struct resource *code_resource,
-		struct resource *data_resource, struct resource *bss_resource);
+extern void e820_reserve_resources(void);
 extern void e820_mark_nosave_regions(void);
 extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type);
 extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type);