x86/boot/e820: Harmonize the 'struct e820_table' fields

So the e820_table->map and e820_table->nr_map names are a bit
confusing, because it's not clear what a 'map' really means
(it could be a bitmap, or some other data structure), nor is
it clear what nr_map means (is it a current index, or some
other count).

Rename the fields from:

 e820_table->map        =>     e820_table->entries
 e820_table->nr_map     =>     e820_table->nr_entries

which makes it abundantly clear that these are entries
of the table, and that the size of the table is ->nr_entries.

Propagate the changes to all affected files. Where necessary,
adjust local variable names to better reflect the new field names.

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/include/asm/e820/types.h

@@ -69,8 +69,8 @@
  * The whole array of E820 entries:
  */
 struct e820_table {
-	__u32 nr_map;
-	struct e820_entry map[E820_X_MAX];
+	__u32 nr_entries;
+	struct e820_entry entries[E820_X_MAX];
 };
 
 /*

arch/x86/kernel/early-quirks.c

@@ -547,7 +547,7 @@ intel_graphics_stolen(int num, int slot, int func,
 
 	/* Mark this space as reserved */
 	e820_add_region(base, size, E820_RESERVED);
-	sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map);
+	sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
 }
 
 static void __init intel_graphics_quirks(int num, int slot, int func)

arch/x86/kernel/kexec-bzimage64.c

@@ -100,15 +100,14 @@ static int setup_e820_entries(struct boot_params *params)
 {
 	unsigned int nr_e820_entries;
 
-	nr_e820_entries = e820_table_saved->nr_map;
+	nr_e820_entries = e820_table_saved->nr_entries;
 
 	/* TODO: Pass entries more than E820MAX in bootparams setup data */
 	if (nr_e820_entries > E820MAX)
 		nr_e820_entries = E820MAX;
 
 	params->e820_entries = nr_e820_entries;
-	memcpy(&params->e820_table, &e820_table_saved->map,
-	       nr_e820_entries * sizeof(struct e820_entry));
+	memcpy(&params->e820_table, &e820_table_saved->entries, nr_e820_entries*sizeof(struct e820_entry));
 
 	return 0;
 }

arch/x86/kernel/resource.c

@@ -27,8 +27,8 @@ static void remove_e820_regions(struct resource *avail)
 	int i;
 	struct e820_entry *entry;
 
-	for (i = 0; i < e820_table->nr_map; i++) {
-		entry = &e820_table->map[i];
+	for (i = 0; i < e820_table->nr_entries; i++) {
+		entry = &e820_table->entries[i];
 
 		resource_clip(avail, entry->addr,
 			      entry->addr + entry->size - 1);

arch/x86/kernel/setup.c

@@ -458,7 +458,7 @@ static void __init e820_reserve_setup_data(void)
 		early_memunmap(data, sizeof(*data));
 	}
 
-	sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map);
+	sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
 	memcpy(e820_table_saved, e820_table, sizeof(struct e820_table));
 	printk(KERN_INFO "extended physical RAM map:\n");
 	e820_print_map("reserve setup_data");
@@ -763,7 +763,7 @@ static void __init trim_bios_range(void)
 	 */
 	e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
 
-	sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map);
+	sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
 }
 
 /* called before trim_bios_range() to spare extra sanitize */
@@ -1056,7 +1056,7 @@ void __init setup_arch(char **cmdline_p)
 	if (ppro_with_ram_bug()) {
 		e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
 				  E820_RESERVED);
-		sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map);
+		sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
 		printk(KERN_INFO "fixed physical RAM map:\n");
 		e820_print_map("bad_ppro");
 	}

arch/x86/kernel/tboot.c

@@ -188,12 +188,12 @@ static int tboot_setup_sleep(void)
 
 	tboot->num_mac_regions = 0;
 
-	for (i = 0; i < e820_table->nr_map; i++) {
-		if ((e820_table->map[i].type != E820_RAM)
-		 && (e820_table->map[i].type != E820_RESERVED_KERN))
+	for (i = 0; i < e820_table->nr_entries; i++) {
+		if ((e820_table->entries[i].type != E820_RAM)
+		 && (e820_table->entries[i].type != E820_RESERVED_KERN))
 			continue;
 
-		add_mac_region(e820_table->map[i].addr, e820_table->map[i].size);
+		add_mac_region(e820_table->entries[i].addr, e820_table->entries[i].size);
 	}
 
 	tboot->acpi_sinfo.kernel_s3_resume_vector =

arch/x86/platform/efi/efi.c

@@ -167,7 +167,7 @@ static void __init do_add_efi_memmap(void)
 		}
 		e820_add_region(start, size, e820_type);
 	}
-	sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map);
+	sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
 }
 
 int __init efi_memblock_x86_reserve_range(void)

arch/x86/power/hibernate_64.c

@@ -196,12 +196,12 @@ struct restore_data_record {
 
 #if IS_BUILTIN(CONFIG_CRYPTO_MD5)
 /**
- * get_e820_md5 - calculate md5 according to given e820 map
+ * get_e820_md5 - calculate md5 according to given e820 table
  *
- * @map: the e820 map to be calculated
+ * @table: the e820 table to be calculated
  * @buf: the md5 result to be stored to
  */
-static int get_e820_md5(struct e820_table *map, void *buf)
+static int get_e820_md5(struct e820_table *table, void *buf)
 {
 	struct scatterlist sg;
 	struct crypto_ahash *tfm;
@@ -214,10 +214,9 @@ static int get_e820_md5(struct e820_table *map, void *buf)
 
 	{
 		AHASH_REQUEST_ON_STACK(req, tfm);
-		size = offsetof(struct e820_table, map)
-			+ sizeof(struct e820_entry) * map->nr_map;
+		size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry) * table->nr_entries;
 		ahash_request_set_tfm(req, tfm);
-		sg_init_one(&sg, (u8 *)map, size);
+		sg_init_one(&sg, (u8 *)table, size);
 		ahash_request_set_callback(req, 0, NULL, NULL);
 		ahash_request_set_crypt(req, &sg, buf, size);
 

arch/x86/xen/setup.c

@@ -861,7 +861,7 @@ char * __init xen_memory_setup(void)
 	e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS,
 			E820_RESERVED);
 
-	sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map);
+	sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
 
 	/*
 	 * Check whether the kernel itself conflicts with the target E820 map.