1 files changed, 54 insertions, 61 deletions

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 1a84a8d00005..29d4dde65c45 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -82,18 +82,11 @@ int page_is_ram(unsigned long pfn)
         return pfn < max_pfn;
 #else
         unsigned long paddr = (pfn << PAGE_SHIFT);
-        int i;
-        for (i=0; i < memblock.memory.cnt; i++) {
-                unsigned long base;
+        struct memblock_region *reg;
 
-                base = memblock.memory.region[i].base;
-
-                if ((paddr >= base) &&
-                        (paddr < (base + memblock.memory.region[i].size))) {
+        for_each_memblock(memory, reg)
+                if (paddr >= reg->base && paddr < (reg->base + reg->size))
                         return 1;
-                }
-        }
-
         return 0;
 #endif
 }
@@ -149,23 +142,19 @@ int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
                 void *arg, int (*func)(unsigned long, unsigned long, void *))
 {
-        struct memblock_property res;
-        unsigned long pfn, len;
-        u64 end;
+        struct memblock_region *reg;
+        unsigned long end_pfn = start_pfn + nr_pages;
+        unsigned long tstart, tend;
         int ret = -1;
 
-        res.base = (u64) start_pfn << PAGE_SHIFT;
-        res.size = (u64) nr_pages << PAGE_SHIFT;
-
-        end = res.base + res.size - 1;
-        while ((res.base < end) && (memblock_find(&res) >= 0)) {
-                pfn = (unsigned long)(res.base >> PAGE_SHIFT);
-                len = (unsigned long)(res.size >> PAGE_SHIFT);
-                ret = (*func)(pfn, len, arg);
+        for_each_memblock(memory, reg) {
+                tstart = max(start_pfn, memblock_region_memory_base_pfn(reg));
+                tend = min(end_pfn, memblock_region_memory_end_pfn(reg));
+                if (tstart >= tend)
+                        continue;
+                ret = (*func)(tstart, tend - tstart, arg);
                 if (ret)
                         break;
-                res.base += (res.size + 1);
-                res.size = (end - res.base + 1);
         }
         return ret;
 }
@@ -179,9 +168,9 @@ EXPORT_SYMBOL_GPL(walk_system_ram_range);
 #ifndef CONFIG_NEED_MULTIPLE_NODES
 void __init do_init_bootmem(void)
 {
-        unsigned long i;
         unsigned long start, bootmap_pages;
         unsigned long total_pages;
+        struct memblock_region *reg;
         int boot_mapsize;
 
         max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
@@ -204,10 +193,10 @@ void __init do_init_bootmem(void)
         boot_mapsize = init_bootmem_node(NODE_DATA(0), start >> PAGE_SHIFT, min_low_pfn, max_low_pfn);
 
         /* Add active regions with valid PFNs */
-        for (i = 0; i < memblock.memory.cnt; i++) {
+        for_each_memblock(memory, reg) {
                 unsigned long start_pfn, end_pfn;
-                start_pfn = memblock.memory.region[i].base >> PAGE_SHIFT;
-                end_pfn = start_pfn + memblock_size_pages(&memblock.memory, i);
+                start_pfn = memblock_region_memory_base_pfn(reg);
+                end_pfn = memblock_region_memory_end_pfn(reg);
                 add_active_range(0, start_pfn, end_pfn);
         }
 
@@ -218,29 +207,21 @@ void __init do_init_bootmem(void)
         free_bootmem_with_active_regions(0, lowmem_end_addr >> PAGE_SHIFT);
 
         /* reserve the sections we're already using */
-        for (i = 0; i < memblock.reserved.cnt; i++) {
-                unsigned long addr = memblock.reserved.region[i].base +
-                                     memblock_size_bytes(&memblock.reserved, i) - 1;
-                if (addr < lowmem_end_addr)
-                        reserve_bootmem(memblock.reserved.region[i].base,
-                                        memblock_size_bytes(&memblock.reserved, i),
-                                        BOOTMEM_DEFAULT);
-                else if (memblock.reserved.region[i].base < lowmem_end_addr) {
-                        unsigned long adjusted_size = lowmem_end_addr -
-                                      memblock.reserved.region[i].base;
-                        reserve_bootmem(memblock.reserved.region[i].base,
-                                        adjusted_size, BOOTMEM_DEFAULT);
+        for_each_memblock(reserved, reg) {
+                unsigned long top = reg->base + reg->size - 1;
+                if (top < lowmem_end_addr)
+                        reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
+                else if (reg->base < lowmem_end_addr) {
+                        unsigned long trunc_size = lowmem_end_addr - reg->base;
+                        reserve_bootmem(reg->base, trunc_size, BOOTMEM_DEFAULT);
                 }
         }
 #else
         free_bootmem_with_active_regions(0, max_pfn);
 
         /* reserve the sections we're already using */
-        for (i = 0; i < memblock.reserved.cnt; i++)
-                reserve_bootmem(memblock.reserved.region[i].base,
-                                memblock_size_bytes(&memblock.reserved, i),
-                                BOOTMEM_DEFAULT);
-
+        for_each_memblock(reserved, reg)
+                reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
 #endif
         /* XXX need to clip this if using highmem? */
         sparse_memory_present_with_active_regions(0);
@@ -251,22 +232,15 @@ void __init do_init_bootmem(void)
 /* mark pages that don't exist as nosave */
 static int __init mark_nonram_nosave(void)
 {
-        unsigned long memblock_next_region_start_pfn,
-                      memblock_region_max_pfn;
-        int i;
-
-        for (i = 0; i < memblock.memory.cnt - 1; i++) {
-                memblock_region_max_pfn =
-                        (memblock.memory.region[i].base >> PAGE_SHIFT) +
-                        (memblock.memory.region[i].size >> PAGE_SHIFT);
-                memblock_next_region_start_pfn =
-                        memblock.memory.region[i+1].base >> PAGE_SHIFT;
-
-                if (memblock_region_max_pfn < memblock_next_region_start_pfn)
-                        register_nosave_region(memblock_region_max_pfn,
-                                               memblock_next_region_start_pfn);
+        struct memblock_region *reg, *prev = NULL;
+
+        for_each_memblock(memory, reg) {
+                if (prev &&
+                    memblock_region_memory_end_pfn(prev) < memblock_region_memory_base_pfn(reg))
+                        register_nosave_region(memblock_region_memory_end_pfn(prev),
+                                               memblock_region_memory_base_pfn(reg));
+                prev = reg;
         }
-
         return 0;
 }
 
@@ -327,7 +301,7 @@ void __init mem_init(void)
                 swiotlb_init(1);
 #endif
 
-        num_physpages = memblock.memory.size >> PAGE_SHIFT;
+        num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT;
         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -408,6 +382,25 @@ void __init mem_init(void)
         mem_init_done = 1;
 }
 
+#ifdef CONFIG_BLK_DEV_INITRD
+void __init free_initrd_mem(unsigned long start, unsigned long end)
+{
+        if (start >= end)
+                return;
+
+        start = _ALIGN_DOWN(start, PAGE_SIZE);
+        end = _ALIGN_UP(end, PAGE_SIZE);
+        pr_info("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
+
+        for (; start < end; start += PAGE_SIZE) {
+                ClearPageReserved(virt_to_page(start));
+                init_page_count(virt_to_page(start));
+                free_page(start);
+                totalram_pages++;
+        }
+}
+#endif
+
 /*
  * This is called when a page has been modified by the kernel.
  * It just marks the page as not i-cache clean.  We do the i-cache
@@ -450,7 +443,7 @@ void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
         clear_page(page);
 
         /*
-         * We shouldnt have to do this, but some versions of glibc
+         * We shouldn't have to do this, but some versions of glibc
          * require it (ld.so assumes zero filled pages are icache clean)
          * - Anton
          */