Commit bf495573 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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: default avatarIngo Molnar <mingo@kernel.org>
parent 61a50101

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

+2 −2
Original line number Diff line number Diff line
@@ -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/e820.c

+56 −58
Original line number Diff line number Diff line
@@ -60,8 +60,8 @@ e820_any_mapped(u64 start, u64 end, unsigned type) 
{

	int i;



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];



		if (type && ei->type != type)

			continue;
@@ -83,8 +83,8 @@ int __init e820_all_mapped(u64 start, u64 end, unsigned type) 
{

	int i;



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];



		if (type && ei->type != type)

			continue;
@@ -110,22 +110,21 @@ int __init e820_all_mapped(u64 start, u64 end, unsigned type) 
/*

 * Add a memory region to the kernel e820 map.

 */

static void __init __e820_add_region(struct e820_table *e820x, u64 start, u64 size,

					 int type)

static void __init __e820_add_region(struct e820_table *table, u64 start, u64 size, int type)

{

	int x = e820x->nr_map;

	int x = table->nr_entries;



	if (x >= ARRAY_SIZE(e820x->map)) {

	if (x >= ARRAY_SIZE(table->entries)) {

		printk(KERN_ERR "e820: too many entries; ignoring [mem %#010llx-%#010llx]\n",

		       (unsigned long long) start,

		       (unsigned long long) (start + size - 1));

		return;

	}



	e820x->map[x].addr = start;

	e820x->map[x].size = size;

	e820x->map[x].type = type;

	e820x->nr_map++;

	table->entries[x].addr = start;

	table->entries[x].size = size;

	table->entries[x].type = type;

	table->nr_entries++;

}



void __init e820_add_region(u64 start, u64 size, int type)
@@ -166,12 +165,12 @@ void __init e820_print_map(char *who) 
{

	int i;



	for (i = 0; i < e820_table->nr_map; i++) {

	for (i = 0; i < e820_table->nr_entries; i++) {

		printk(KERN_INFO "%s: [mem %#018Lx-%#018Lx] ", who,

		       (unsigned long long) e820_table->map[i].addr,

		       (unsigned long long) e820_table->entries[i].addr,

		       (unsigned long long)

		       (e820_table->map[i].addr + e820_table->map[i].size - 1));

		e820_print_type(e820_table->map[i].type);

		       (e820_table->entries[i].addr + e820_table->entries[i].size - 1));

		e820_print_type(e820_table->entries[i].type);

		printk(KERN_CONT "\n");

	}

}
@@ -423,7 +422,7 @@ static int __init append_e820_table(struct e820_entry *biosmap, int nr_map) 
	return __append_e820_table(biosmap, nr_map);

}



static u64 __init __e820_update_range(struct e820_table *e820x, u64 start,

static u64 __init __e820_update_range(struct e820_table *table, u64 start,

					u64 size, unsigned old_type,

					unsigned new_type)

{
@@ -444,8 +443,8 @@ static u64 __init __e820_update_range(struct e820_table *e820x, u64 start, 
	e820_print_type(new_type);

	printk(KERN_CONT "\n");



	for (i = 0; i < e820x->nr_map; i++) {

		struct e820_entry *ei = &e820x->map[i];

	for (i = 0; i < table->nr_entries; i++) {

		struct e820_entry *ei = &table->entries[i];

		u64 final_start, final_end;

		u64 ei_end;
@@ -462,8 +461,8 @@ static u64 __init __e820_update_range(struct e820_table *e820x, u64 start, 


		/* new range is totally covered? */

		if (ei->addr < start && ei_end > end) {

			__e820_add_region(e820x, start, size, new_type);

			__e820_add_region(e820x, end, ei_end - end, ei->type);

			__e820_add_region(table, start, size, new_type);

			__e820_add_region(table, end, ei_end - end, ei->type);

			ei->size = start - ei->addr;

			real_updated_size += size;

			continue;
@@ -475,7 +474,7 @@ static u64 __init __e820_update_range(struct e820_table *e820x, u64 start, 
		if (final_start >= final_end)

			continue;



		__e820_add_region(e820x, final_start, final_end - final_start,

		__e820_add_region(table, final_start, final_end - final_start,

				  new_type);



		real_updated_size += final_end - final_start;
@@ -523,8 +522,8 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type, 
		e820_print_type(old_type);

	printk(KERN_CONT "\n");



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];

		u64 final_start, final_end;

		u64 ei_end;
@@ -568,15 +567,14 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type, 


void __init update_e820(void)

{

	if (sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map), &e820_table->nr_map))

	if (sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries))

		return;

	printk(KERN_INFO "e820: modified physical RAM map:\n");

	e820_print_map("modified");

}

static void __init update_e820_table_saved(void)

{

	sanitize_e820_table(e820_table_saved->map, ARRAY_SIZE(e820_table_saved->map),

				&e820_table_saved->nr_map);

	sanitize_e820_table(e820_table_saved->entries, ARRAY_SIZE(e820_table_saved->entries), &e820_table_saved->nr_entries);

}

#define MAX_GAP_END 0x100000000ull

/*
@@ -586,12 +584,12 @@ static int __init e820_search_gap(unsigned long *gapstart, 
		unsigned long *gapsize)

{

	unsigned long long last = MAX_GAP_END;

	int i = e820_table->nr_map;

	int i = e820_table->nr_entries;

	int found = 0;



	while (--i >= 0) {

		unsigned long long start = e820_table->map[i].addr;

		unsigned long long end = start + e820_table->map[i].size;

		unsigned long long start = e820_table->entries[i].addr;

		unsigned long long end = start + e820_table->entries[i].size;



		/*

		 * Since "last" is at most 4GB, we know we'll
@@ -661,13 +659,13 @@ __init void e820_reallocate_tables(void) 
	struct e820_table *n;

	int size;



	size = offsetof(struct e820_table, map) + sizeof(struct e820_entry) * e820_table->nr_map;

	size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry) * e820_table->nr_entries;

	n = kmalloc(size, GFP_KERNEL);

	BUG_ON(!n);

	memcpy(n, e820_table, size);

	e820_table = n;



	size = offsetof(struct e820_table, map) + sizeof(struct e820_entry) * e820_table_saved->nr_map;

	size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry) * e820_table_saved->nr_entries;

	n = kmalloc(size, GFP_KERNEL);

	BUG_ON(!n);

	memcpy(n, e820_table_saved, size);
@@ -690,7 +688,7 @@ void __init parse_e820_ext(u64 phys_addr, u32 data_len) 
	entries = sdata->len / sizeof(struct e820_entry);

	extmap = (struct e820_entry *)(sdata->data);

	__append_e820_table(extmap, entries);

	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);

	early_memunmap(sdata, data_len);

	printk(KERN_INFO "e820: extended physical RAM map:\n");

	e820_print_map("extended");
@@ -709,8 +707,8 @@ void __init e820_mark_nosave_regions(unsigned long limit_pfn) 
	int i;

	unsigned long pfn = 0;



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];



		if (pfn < PFN_UP(ei->addr))

			register_nosave_region(pfn, PFN_UP(ei->addr));
@@ -734,8 +732,8 @@ static int __init e820_mark_nvs_memory(void) 
{

	int i;



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];



		if (ei->type == E820_NVS)

			acpi_nvs_register(ei->addr, ei->size);
@@ -782,8 +780,8 @@ static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type) 
	unsigned long last_pfn = 0;

	unsigned long max_arch_pfn = MAX_ARCH_PFN;



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];

		unsigned long start_pfn;

		unsigned long end_pfn;
@@ -874,7 +872,7 @@ static int __init parse_memmap_one(char *p) 
		 */

		saved_max_pfn = e820_end_of_ram_pfn();

#endif

		e820_table->nr_map = 0;

		e820_table->nr_entries = 0;

		userdef = 1;

		return 0;

	}
@@ -921,8 +919,8 @@ early_param("memmap", parse_memmap_opt); 
void __init finish_e820_parsing(void)

{

	if (userdef) {

		if (sanitize_e820_table(e820_table->map, ARRAY_SIZE(e820_table->map),

					&e820_table->nr_map) < 0)

		if (sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries),

					&e820_table->nr_entries) < 0)

			early_panic("Invalid user supplied memory map");



		printk(KERN_INFO "e820: user-defined physical RAM map:\n");
@@ -1009,35 +1007,35 @@ void __init e820_reserve_resources(void) 
	struct resource *res;

	u64 end;



	res = alloc_bootmem(sizeof(struct resource) * e820_table->nr_map);

	res = alloc_bootmem(sizeof(struct resource) * e820_table->nr_entries);

	e820_res = res;

	for (i = 0; i < e820_table->nr_map; i++) {

		end = e820_table->map[i].addr + e820_table->map[i].size - 1;

	for (i = 0; i < e820_table->nr_entries; i++) {

		end = e820_table->entries[i].addr + e820_table->entries[i].size - 1;

		if (end != (resource_size_t)end) {

			res++;

			continue;

		}

		res->name = e820_type_to_string(e820_table->map[i].type);

		res->start = e820_table->map[i].addr;

		res->name = e820_type_to_string(e820_table->entries[i].type);

		res->start = e820_table->entries[i].addr;

		res->end = end;



		res->flags = e820_type_to_iomem_type(e820_table->map[i].type);

		res->desc = e820_type_to_iores_desc(e820_table->map[i].type);

		res->flags = e820_type_to_iomem_type(e820_table->entries[i].type);

		res->desc = e820_type_to_iores_desc(e820_table->entries[i].type);



		/*

		 * don't register the region that could be conflicted with

		 * pci device BAR resource and insert them later in

		 * pcibios_resource_survey()

		 */

		if (do_mark_busy(e820_table->map[i].type, res)) {

		if (do_mark_busy(e820_table->entries[i].type, res)) {

			res->flags |= IORESOURCE_BUSY;

			insert_resource(&iomem_resource, res);

		}

		res++;

	}



	for (i = 0; i < e820_table_saved->nr_map; i++) {

		struct e820_entry *entry = &e820_table_saved->map[i];

	for (i = 0; i < e820_table_saved->nr_entries; i++) {

		struct e820_entry *entry = &e820_table_saved->entries[i];

		firmware_map_add_early(entry->addr,

			entry->addr + entry->size,

			e820_type_to_string(entry->type));
@@ -1069,7 +1067,7 @@ void __init e820_reserve_resources_late(void) 
	struct resource *res;



	res = e820_res;

	for (i = 0; i < e820_table->nr_map; i++) {

	for (i = 0; i < e820_table->nr_entries; i++) {

		if (!res->parent && res->end)

			insert_resource_expand_to_fit(&iomem_resource, res);

		res++;
@@ -1079,8 +1077,8 @@ void __init e820_reserve_resources_late(void) 
	 * Try to bump up RAM regions to reasonable boundaries to

	 * avoid stolen RAM:

	 */

	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *entry = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *entry = &e820_table->entries[i];

		u64 start, end;



		if (entry->type != E820_RAM)
@@ -1128,7 +1126,7 @@ char *__init default_machine_specific_memory_setup(void) 
			who = "BIOS-e801";

		}



		e820_table->nr_map = 0;

		e820_table->nr_entries = 0;

		e820_add_region(0, LOWMEMSIZE(), E820_RAM);

		e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);

	}
@@ -1159,8 +1157,8 @@ void __init memblock_x86_fill(void) 
	 */

	memblock_allow_resize();



	for (i = 0; i < e820_table->nr_map; i++) {

		struct e820_entry *ei = &e820_table->map[i];

	for (i = 0; i < e820_table->nr_entries; i++) {

		struct e820_entry *ei = &e820_table->entries[i];



		end = ei->addr + ei->size;

		if (end != (resource_size_t)end)

arch/x86/kernel/early-quirks.c

+1 −1
Original line number Diff line number Diff line
@@ -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

+2 −3
Original line number Diff line number Diff line
@@ -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

+2 −2
Original line number Diff line number Diff line
@@ -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);

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