ia64: switch to NO_BOOTMEM

Since ia64 already uses memblock to register available physical memory it
is only required to move the calls to register_active_ranges() that wrap
memblock_add_node() earlier and replace bootmem memory reservations with
memblock_reserve(). Of course, all the code that find the place to put the
bootmem bitmap is removed.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

4 files changed, 22 insertions, 135 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ff861420b8f5..107b1389a450 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -31,6 +31,7 @@ config IA64
         select HAVE_ARCH_TRACEHOOK
         select HAVE_MEMBLOCK
         select HAVE_MEMBLOCK_NODE_MAP
+        select NO_BOOTMEM
         select HAVE_VIRT_CPU_ACCOUNTING
         select ARCH_HAS_DMA_MARK_CLEAN
         select ARCH_HAS_SG_CHAIN
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index ad43cbf70628..0e6c2d9fb498 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -32,6 +32,7 @@
 #include <linux/delay.h>
 #include <linux/cpu.h>
 #include <linux/kernel.h>
+#include <linux/memblock.h>
 #include <linux/reboot.h>
 #include <linux/sched/mm.h>
 #include <linux/sched/clock.h>
@@ -383,8 +384,16 @@ reserve_memory (void)
 
         sort_regions(rsvd_region, num_rsvd_regions);
         num_rsvd_regions = merge_regions(rsvd_region, num_rsvd_regions);
-}
 
+        /* reserve all regions except the end of memory marker with memblock */
+        for (n = 0; n < num_rsvd_regions - 1; n++) {
+                struct rsvd_region *region = &rsvd_region[n];
+                phys_addr_t addr = __pa(region->start);
+                phys_addr_t size = region->end - region->start;
+
+                memblock_reserve(addr, size);
+        }
+}
 
 /**
  * find_initrd - get initrd parameters from the boot parameter structure
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 1835144268ec..e2e40bbd391c 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -34,53 +34,6 @@ static unsigned long max_gap;
 /* physical address where the bootmem map is located */
 unsigned long bootmap_start;
 
-/**
- * find_bootmap_location - callback to find a memory area for the bootmap
- * @start: start of region
- * @end: end of region
- * @arg: unused callback data
- *
- * Find a place to put the bootmap and return its starting address in
- * bootmap_start.  This address must be page-aligned.
- */
-static int __init
-find_bootmap_location (u64 start, u64 end, void *arg)
-{
-        u64 needed = *(unsigned long *)arg;
-        u64 range_start, range_end, free_start;
-        int i;
-
-#if IGNORE_PFN0
-        if (start == PAGE_OFFSET) {
-                start += PAGE_SIZE;
-                if (start >= end)
-                        return 0;
-        }
-#endif
-
-        free_start = PAGE_OFFSET;
-
-        for (i = 0; i < num_rsvd_regions; i++) {
-                range_start = max(start, free_start);
-                range_end   = min(end, rsvd_region[i].start & PAGE_MASK);
-
-                free_start = PAGE_ALIGN(rsvd_region[i].end);
-
-                if (range_end <= range_start)
-                        continue; /* skip over empty range */
-
-                if (range_end - range_start >= needed) {
-                        bootmap_start = __pa(range_start);
-                        return -1;      /* done */
-                }
-
-                /* nothing more available in this segment */
-                if (range_end == end)
-                        return 0;
-        }
-        return 0;
-}
-
 #ifdef CONFIG_SMP
 static void *cpu_data;
 /**
@@ -196,8 +149,6 @@ setup_per_cpu_areas(void)
 void __init
 find_memory (void)
 {
-        unsigned long bootmap_size;
-
         reserve_memory();
 
         /* first find highest page frame number */
@@ -205,21 +156,12 @@ find_memory (void)
         max_low_pfn = 0;
         efi_memmap_walk(find_max_min_low_pfn, NULL);
         max_pfn = max_low_pfn;
-        /* how many bytes to cover all the pages */
-        bootmap_size = bootmem_bootmap_pages(max_pfn) << PAGE_SHIFT;
 
-        /* look for a location to hold the bootmap */
-        bootmap_start = ~0UL;
-        efi_memmap_walk(find_bootmap_location, &bootmap_size);
-        if (bootmap_start == ~0UL)
-                panic("Cannot find %ld bytes for bootmap\n", bootmap_size);
-
-        bootmap_size = init_bootmem_node(NODE_DATA(0),
-                        (bootmap_start >> PAGE_SHIFT), 0, max_pfn);
-
-        /* Free all available memory, then mark bootmem-map as being in use. */
-        efi_memmap_walk(filter_rsvd_memory, free_bootmem);
-        reserve_bootmem(bootmap_start, bootmap_size, BOOTMEM_DEFAULT);
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+        efi_memmap_walk(filter_memory, register_active_ranges);
+#else
+        memblock_add_node(0, PFN_PHYS(max_low_pfn), 0);
+#endif
 
         find_initrd();
 
@@ -244,7 +186,6 @@ paging_init (void)
         max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
-        efi_memmap_walk(filter_memory, register_active_ranges);
         efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
         if (max_gap < LARGE_GAP) {
                 vmem_map = (struct page *) 0;
@@ -268,8 +209,6 @@ paging_init (void)
 
                 printk("Virtual mem_map starts at 0x%p\n", mem_map);
         }
-#else /* !CONFIG_VIRTUAL_MEM_MAP */
-        memblock_add_node(0, PFN_PHYS(max_low_pfn), 0);
 #endif /* !CONFIG_VIRTUAL_MEM_MAP */
         free_area_init_nodes(max_zone_pfns);
         zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 8e99d8e2455e..1928d5719e41 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -20,6 +20,7 @@
 #include <linux/nmi.h>
 #include <linux/swap.h>
 #include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/acpi.h>
 #include <linux/efi.h>
 #include <linux/nodemask.h>
@@ -264,7 +265,6 @@ static void __init fill_pernode(int node, unsigned long pernode,
 {
         void *cpu_data;
         int cpus = early_nr_cpus_node(node);
-        struct bootmem_data *bdp = &bootmem_node_data[node];
 
         mem_data[node].pernode_addr = pernode;
         mem_data[node].pernode_size = pernodesize;
@@ -279,8 +279,6 @@ static void __init fill_pernode(int node, unsigned long pernode,
 
         mem_data[node].node_data = __va(pernode);
         pernode += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));
-
-        pgdat_list[node]->bdata = bdp;
         pernode += L1_CACHE_ALIGN(sizeof(pg_data_t));
 
         cpu_data = per_cpu_node_setup(cpu_data, node);
@@ -320,14 +318,11 @@ static int __init find_pernode_space(unsigned long start, unsigned long len,
                                      int node)
 {
         unsigned long spfn, epfn;
-        unsigned long pernodesize = 0, pernode, pages, mapsize;
+        unsigned long pernodesize = 0, pernode;
 
         spfn = start >> PAGE_SHIFT;
         epfn = (start + len) >> PAGE_SHIFT;
 
-        pages = mem_data[node].max_pfn - mem_data[node].min_pfn;
-        mapsize = bootmem_bootmap_pages(pages) << PAGE_SHIFT;
-
         /*
          * Make sure this memory falls within this node's usable memory
          * since we may have thrown some away in build_maps().
@@ -347,32 +342,13 @@ static int __init find_pernode_space(unsigned long start, unsigned long len,
         pernode = NODEDATA_ALIGN(start, node);
 
         /* Is this range big enough for what we want to store here? */
-        if (start + len > (pernode + pernodesize + mapsize))
+        if (start + len > (pernode + pernodesize))
                 fill_pernode(node, pernode, pernodesize);
 
         return 0;
 }
 
 /**
- * free_node_bootmem - free bootmem allocator memory for use
- * @start: physical start of range
- * @len: length of range
- * @node: node where this range resides
- *
- * Simply calls the bootmem allocator to free the specified ranged from
- * the given pg_data_t's bdata struct.  After this function has been called
- * for all the entries in the EFI memory map, the bootmem allocator will
- * be ready to service allocation requests.
- */
-static int __init free_node_bootmem(unsigned long start, unsigned long len,
-                                    int node)
-{
-        free_bootmem_node(pgdat_list[node], start, len);
-
-        return 0;
-}
-
-/**
  * reserve_pernode_space - reserve memory for per-node space
  *
  * Reserve the space used by the bootmem maps & per-node space in the boot
@@ -381,28 +357,17 @@ static int __init free_node_bootmem(unsigned long start, unsigned long len,
  */
 static void __init reserve_pernode_space(void)
 {
-        unsigned long base, size, pages;
-        struct bootmem_data *bdp;
+        unsigned long base, size;
         int node;
 
         for_each_online_node(node) {
-                pg_data_t *pdp = pgdat_list[node];
-
                 if (node_isset(node, memory_less_mask))
                         continue;
 
-                bdp = pdp->bdata;
-
-                /* First the bootmem_map itself */
-                pages = mem_data[node].max_pfn - mem_data[node].min_pfn;
-                size = bootmem_bootmap_pages(pages) << PAGE_SHIFT;
-                base = __pa(bdp->node_bootmem_map);
-                reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT);
-
                 /* Now the per-node space */
                 size = mem_data[node].pernode_size;
                 base = __pa(mem_data[node].pernode_addr);
-                reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT);
+                memblock_reserve(base, size);
         }
 }
 
@@ -522,6 +487,7 @@ void __init find_memory(void)
         int node;
 
         reserve_memory();
+        efi_memmap_walk(filter_memory, register_active_ranges);
 
         if (num_online_nodes() == 0) {
                 printk(KERN_ERR "node info missing!\n");
@@ -541,34 +507,6 @@ void __init find_memory(void)
                 if (mem_data[node].min_pfn)
                         node_clear(node, memory_less_mask);
 
-        efi_memmap_walk(filter_memory, register_active_ranges);
-
-        /*
-         * Initialize the boot memory maps in reverse order since that's
-         * what the bootmem allocator expects
-         */
-        for (node = MAX_NUMNODES - 1; node >= 0; node--) {
-                unsigned long pernode, pernodesize, map;
-                struct bootmem_data *bdp;
-
-                if (!node_online(node))
-                        continue;
-                else if (node_isset(node, memory_less_mask))
-                        continue;
-
-                bdp = &bootmem_node_data[node];
-                pernode = mem_data[node].pernode_addr;
-                pernodesize = mem_data[node].pernode_size;
-                map = pernode + pernodesize;
-
-                init_bootmem_node(pgdat_list[node],
-                                  map>>PAGE_SHIFT,
-                                  mem_data[node].min_pfn,
-                                  mem_data[node].max_pfn);
-        }
-
-        efi_memmap_walk(filter_rsvd_memory, free_node_bootmem);
-
         reserve_pernode_space();
         memory_less_nodes();
         initialize_pernode_data();