mm: document do_fault_around() feature

[mirror_ubuntu-bionic-kernel.git] / mm / memblock.c

diff --git a/mm/memblock.c b/mm/memblock.c
index a810ba923cdd5304e655fd93e69a6f796e80e417..0aa0d2b0762443d90a9f432a7969bef24b02c09b 100644 (file)
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1033,22 +1033,35 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
 }
 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
 
-static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
-                                       phys_addr_t align, phys_addr_t max_addr,
-                                       int nid)
+static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
+                                       phys_addr_t align, phys_addr_t start,
+                                       phys_addr_t end, int nid)
 {
        phys_addr_t found;
 
        if (!align)
                align = SMP_CACHE_BYTES;
 
-       found = memblock_find_in_range_node(size, align, 0, max_addr, nid);
+       found = memblock_find_in_range_node(size, align, start, end, nid);
        if (found && !memblock_reserve(found, size))
                return found;
 
        return 0;
 }
 
+phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
+                                       phys_addr_t start, phys_addr_t end)
+{
+       return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE);
+}
+
+static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
+                                       phys_addr_t align, phys_addr_t max_addr,
+                                       int nid)
+{
+       return memblock_alloc_range_nid(size, align, 0, max_addr, nid);
+}
+
 phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
 {
        return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, nid);
@@ -1389,9 +1402,8 @@ int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
        if (mid == -1)
                return -1;
 
-       *start_pfn = type->regions[mid].base >> PAGE_SHIFT;
-       *end_pfn = (type->regions[mid].base + type->regions[mid].size)
-                       >> PAGE_SHIFT;
+       *start_pfn = PFN_DOWN(type->regions[mid].base);
+       *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size);
 
        return type->regions[mid].nid;
 }