ARM: Remove DISCONTIGMEM support
Everything should now be using sparsemem rather than discontigmem, so
remove the code supporting discontigmem from ARM.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index f6a9994..4011e52 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -79,38 +79,37 @@
void show_mem(void)
{
int free = 0, total = 0, reserved = 0;
- int shared = 0, cached = 0, slab = 0, node, i;
+ int shared = 0, cached = 0, slab = 0, i;
struct meminfo * mi = &meminfo;
printk("Mem-info:\n");
show_free_areas();
- for_each_online_node(node) {
- for_each_nodebank (i,mi,node) {
- struct membank *bank = &mi->bank[i];
- unsigned int pfn1, pfn2;
- struct page *page, *end;
- pfn1 = bank_pfn_start(bank);
- pfn2 = bank_pfn_end(bank);
+ for_each_bank (i, mi) {
+ struct membank *bank = &mi->bank[i];
+ unsigned int pfn1, pfn2;
+ struct page *page, *end;
- page = pfn_to_page(pfn1);
- end = pfn_to_page(pfn2 - 1) + 1;
+ pfn1 = bank_pfn_start(bank);
+ pfn2 = bank_pfn_end(bank);
- do {
- total++;
- if (PageReserved(page))
- reserved++;
- else if (PageSwapCache(page))
- cached++;
- else if (PageSlab(page))
- slab++;
- else if (!page_count(page))
- free++;
- else
- shared += page_count(page) - 1;
- page++;
- } while (page < end);
- }
+ page = pfn_to_page(pfn1);
+ end = pfn_to_page(pfn2 - 1) + 1;
+
+ do {
+ total++;
+ if (PageReserved(page))
+ reserved++;
+ else if (PageSwapCache(page))
+ cached++;
+ else if (PageSlab(page))
+ slab++;
+ else if (!page_count(page))
+ free++;
+ else
+ shared += page_count(page) - 1;
+ page++;
+ } while (page < end);
}
printk("%d pages of RAM\n", total);
@@ -121,7 +120,7 @@
printk("%d pages swap cached\n", cached);
}
-static void __init find_node_limits(int node, struct meminfo *mi,
+static void __init find_limits(struct meminfo *mi,
unsigned long *min, unsigned long *max_low, unsigned long *max_high)
{
int i;
@@ -129,7 +128,7 @@
*min = -1UL;
*max_low = *max_high = 0;
- for_each_nodebank(i, mi, node) {
+ for_each_bank (i, mi) {
struct membank *bank = &mi->bank[i];
unsigned long start, end;
@@ -154,14 +153,14 @@
* the end, we won't clash.
*/
static unsigned int __init
-find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
+find_bootmap_pfn(struct meminfo *mi, unsigned int bootmap_pages)
{
unsigned int start_pfn, i, bootmap_pfn;
start_pfn = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT;
bootmap_pfn = 0;
- for_each_nodebank(i, mi, node) {
+ for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
unsigned int start, end;
@@ -191,7 +190,7 @@
static int __init check_initrd(struct meminfo *mi)
{
- int initrd_node = -2;
+ int initrd = -2;
#ifdef CONFIG_BLK_DEV_INITRD
unsigned long end = phys_initrd_start + phys_initrd_size;
@@ -202,17 +201,17 @@
if (phys_initrd_size) {
unsigned int i;
- initrd_node = -1;
+ initrd = -1;
for (i = 0; i < mi->nr_banks; i++) {
struct membank *bank = &mi->bank[i];
if (bank_phys_start(bank) <= phys_initrd_start &&
end <= bank_phys_end(bank))
- initrd_node = bank->node;
+ initrd = 0;
}
}
- if (initrd_node == -1) {
+ if (initrd == -1) {
printk(KERN_ERR "INITRD: 0x%08lx+0x%08lx extends beyond "
"physical memory - disabling initrd\n",
phys_initrd_start, phys_initrd_size);
@@ -220,10 +219,10 @@
}
#endif
- return initrd_node;
+ return initrd;
}
-static void __init bootmem_init_node(int node, struct meminfo *mi,
+static void __init arm_bootmem_init(struct meminfo *mi,
unsigned long start_pfn, unsigned long end_pfn)
{
unsigned long boot_pfn;
@@ -235,37 +234,36 @@
* Allocate the bootmem bitmap page.
*/
boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
- boot_pfn = find_bootmap_pfn(node, mi, boot_pages);
+ boot_pfn = find_bootmap_pfn(mi, boot_pages);
/*
- * Initialise the bootmem allocator for this node, handing the
+ * Initialise the bootmem allocator, handing the
* memory banks over to bootmem.
*/
- node_set_online(node);
- pgdat = NODE_DATA(node);
+ node_set_online(0);
+ pgdat = NODE_DATA(0);
init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn);
- for_each_nodebank(i, mi, node) {
+ for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
if (!bank->highmem)
- free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
+ free_bootmem(bank_phys_start(bank), bank_phys_size(bank));
}
/*
- * Reserve the bootmem bitmap for this node.
+ * Reserve the bootmem bitmap.
*/
- reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
- boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
+ reserve_bootmem(boot_pfn << PAGE_SHIFT,
+ boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
}
-static void __init bootmem_reserve_initrd(int node)
+static void __init bootmem_reserve_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
- pg_data_t *pgdat = NODE_DATA(node);
int res;
- res = reserve_bootmem_node(pgdat, phys_initrd_start,
- phys_initrd_size, BOOTMEM_EXCLUSIVE);
+ res = reserve_bootmem(phys_initrd_start,
+ phys_initrd_size, BOOTMEM_EXCLUSIVE);
if (res == 0) {
initrd_start = __phys_to_virt(phys_initrd_start);
@@ -279,23 +277,23 @@
#endif
}
-static void __init bootmem_free_node(int node, struct meminfo *mi)
+static void __init arm_bootmem_free(struct meminfo *mi)
{
unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
unsigned long min, max_low, max_high;
int i;
- find_node_limits(node, mi, &min, &max_low, &max_high);
+ find_limits(mi, &min, &max_low, &max_high);
/*
- * initialise the zones within this node.
+ * initialise the zones.
*/
memset(zone_size, 0, sizeof(zone_size));
/*
- * The size of this node has already been determined. If we need
- * to do anything fancy with the allocation of this memory to the
- * zones, now is the time to do it.
+ * The memory size has already been determined. If we need
+ * to do anything fancy with the allocation of this memory
+ * to the zones, now is the time to do it.
*/
zone_size[0] = max_low - min;
#ifdef CONFIG_HIGHMEM
@@ -303,11 +301,11 @@
#endif
/*
- * For each bank in this node, calculate the size of the holes.
- * holes = node_size - sum(bank_sizes_in_node)
+ * Calculate the size of the holes.
+ * holes = node_size - sum(bank_sizes)
*/
memcpy(zhole_size, zone_size, sizeof(zhole_size));
- for_each_nodebank(i, mi, node) {
+ for_each_bank(i, mi) {
int idx = 0;
#ifdef CONFIG_HIGHMEM
if (mi->bank[i].highmem)
@@ -320,9 +318,9 @@
* Adjust the sizes according to any special requirements for
* this machine type.
*/
- arch_adjust_zones(node, zone_size, zhole_size);
+ arch_adjust_zones(0, zone_size, zhole_size);
- free_area_init_node(node, zone_size, min, zhole_size);
+ free_area_init_node(0, zone_size, min, zhole_size);
}
#ifndef CONFIG_SPARSEMEM
@@ -346,16 +344,16 @@
}
EXPORT_SYMBOL(pfn_valid);
-static void arm_memory_present(struct meminfo *mi, int node)
+static void arm_memory_present(struct meminfo *mi)
{
}
#else
-static void arm_memory_present(struct meminfo *mi, int node)
+static void arm_memory_present(struct meminfo *mi)
{
int i;
- for_each_nodebank(i, mi, node) {
+ for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
- memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
+ memory_present(0, bank_pfn_start(bank), bank_pfn_end(bank));
}
}
#endif
@@ -364,55 +362,35 @@
{
struct meminfo *mi = &meminfo;
unsigned long min, max_low, max_high;
- int node, initrd_node;
+ int initrd;
/*
- * Locate which node contains the ramdisk image, if any.
+ * Locate the ramdisk image, if any.
*/
- initrd_node = check_initrd(mi);
+ initrd = check_initrd(mi);
max_low = max_high = 0;
+ find_limits(mi, &min, &max_low, &max_high);
+
+ arm_bootmem_init(mi, min, max_low);
+
/*
- * Run through each node initialising the bootmem allocator.
+ * Reserve any special regions.
*/
- for_each_node(node) {
- unsigned long node_low, node_high;
+ reserve_special_regions();
- find_node_limits(node, mi, &min, &node_low, &node_high);
+ /*
+ * If the initrd is present, reserve its memory.
+ */
+ if (initrd == 0)
+ bootmem_reserve_initrd();
- if (node_low > max_low)
- max_low = node_low;
- if (node_high > max_high)
- max_high = node_high;
-
- /*
- * If there is no memory in this node, ignore it.
- * (We can't have nodes which have no lowmem)
- */
- if (node_low == 0)
- continue;
-
- bootmem_init_node(node, mi, min, node_low);
-
- /*
- * Reserve any special node zero regions.
- */
- if (node == 0)
- reserve_node_zero(NODE_DATA(node));
-
- /*
- * If the initrd is in this node, reserve its memory.
- */
- if (node == initrd_node)
- bootmem_reserve_initrd(node);
-
- /*
- * Sparsemem tries to allocate bootmem in memory_present(),
- * so must be done after the fixed reservations
- */
- arm_memory_present(mi, node);
- }
+ /*
+ * Sparsemem tries to allocate bootmem in memory_present(),
+ * so must be done after the fixed reservations
+ */
+ arm_memory_present(mi);
/*
* sparse_init() needs the bootmem allocator up and running.
@@ -420,12 +398,11 @@
sparse_init();
/*
- * Now free memory in each node - free_area_init_node needs
+ * Now free the memory - free_area_init_node needs
* the sparse mem_map arrays initialized by sparse_init()
* for memmap_init_zone(), otherwise all PFNs are invalid.
*/
- for_each_node(node)
- bootmem_free_node(node, mi);
+ arm_bootmem_free(mi);
high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
@@ -460,7 +437,7 @@
}
static inline void
-free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn)
+free_memmap(unsigned long start_pfn, unsigned long end_pfn)
{
struct page *start_pg, *end_pg;
unsigned long pg, pgend;
@@ -483,13 +460,13 @@
* free the section of the memmap array.
*/
if (pg < pgend)
- free_bootmem_node(NODE_DATA(node), pg, pgend - pg);
+ free_bootmem(pg, pgend - pg);
}
/*
* The mem_map array can get very big. Free the unused area of the memory map.
*/
-static void __init free_unused_memmap_node(int node, struct meminfo *mi)
+static void __init free_unused_memmap(struct meminfo *mi)
{
unsigned long bank_start, prev_bank_end = 0;
unsigned int i;
@@ -499,7 +476,7 @@
* may not be the case, especially if the user has provided the
* information on the command line.
*/
- for_each_nodebank(i, mi, node) {
+ for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
bank_start = bank_pfn_start(bank);
@@ -514,7 +491,7 @@
* between the current bank and the previous, free it.
*/
if (prev_bank_end && prev_bank_end != bank_start)
- free_memmap(node, prev_bank_end, bank_start);
+ free_memmap(prev_bank_end, bank_start);
prev_bank_end = bank_pfn_end(bank);
}
@@ -528,21 +505,14 @@
void __init mem_init(void)
{
unsigned long reserved_pages, free_pages;
- int i, node;
+ int i;
-#ifndef CONFIG_DISCONTIGMEM
max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
-#endif
/* this will put all unused low memory onto the freelists */
- for_each_online_node(node) {
- pg_data_t *pgdat = NODE_DATA(node);
+ free_unused_memmap(&meminfo);
- free_unused_memmap_node(node, &meminfo);
-
- if (pgdat->node_spanned_pages != 0)
- totalram_pages += free_all_bootmem_node(pgdat);
- }
+ totalram_pages += free_all_bootmem();
#ifdef CONFIG_SA1111
/* now that our DMA memory is actually so designated, we can free it */
@@ -552,39 +522,35 @@
#ifdef CONFIG_HIGHMEM
/* set highmem page free */
- for_each_online_node(node) {
- for_each_nodebank (i, &meminfo, node) {
- unsigned long start = bank_pfn_start(&meminfo.bank[i]);
- unsigned long end = bank_pfn_end(&meminfo.bank[i]);
- if (start >= max_low_pfn + PHYS_PFN_OFFSET)
- totalhigh_pages += free_area(start, end, NULL);
- }
+ for_each_bank (i, &meminfo) {
+ unsigned long start = bank_pfn_start(&meminfo.bank[i]);
+ unsigned long end = bank_pfn_end(&meminfo.bank[i]);
+ if (start >= max_low_pfn + PHYS_PFN_OFFSET)
+ totalhigh_pages += free_area(start, end, NULL);
}
totalram_pages += totalhigh_pages;
#endif
reserved_pages = free_pages = 0;
- for_each_online_node(node) {
- for_each_nodebank(i, &meminfo, node) {
- struct membank *bank = &meminfo.bank[i];
- unsigned int pfn1, pfn2;
- struct page *page, *end;
+ for_each_bank(i, &meminfo) {
+ struct membank *bank = &meminfo.bank[i];
+ unsigned int pfn1, pfn2;
+ struct page *page, *end;
- pfn1 = bank_pfn_start(bank);
- pfn2 = bank_pfn_end(bank);
+ pfn1 = bank_pfn_start(bank);
+ pfn2 = bank_pfn_end(bank);
- page = pfn_to_page(pfn1);
- end = pfn_to_page(pfn2 - 1) + 1;
+ page = pfn_to_page(pfn1);
+ end = pfn_to_page(pfn2 - 1) + 1;
- do {
- if (PageReserved(page))
- reserved_pages++;
- else if (!page_count(page))
- free_pages++;
- page++;
- } while (page < end);
- }
+ do {
+ if (PageReserved(page))
+ reserved_pages++;
+ else if (!page_count(page))
+ free_pages++;
+ page++;
+ } while (page < end);
}
/*