1 files changed, 76 insertions, 6 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7acc9dc73c9f..c05d7cfbb6b9 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -44,6 +44,9 @@ extern int sysctl_legacy_va_layout;
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 
+extern unsigned long sysctl_user_reserve_kbytes;
+extern unsigned long sysctl_admin_reserve_kbytes;
+
 #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
 
 /* to align the pointer to the (next) page boundary */
@@ -87,7 +90,6 @@ extern unsigned int kobjsize(const void *objp);
 #define VM_PFNMAP       0x00000400      /* Page-ranges managed without "struct page", just pure PFN */
 #define VM_DENYWRITE    0x00000800      /* ETXTBSY on write attempts.. */
 
-#define VM_POPULATE     0x00001000
 #define VM_LOCKED       0x00002000
 #define VM_IO           0x00004000      /* Memory mapped I/O or similar */
 
@@ -900,7 +902,8 @@ extern void pagefault_out_of_memory(void);
  * Flags passed to show_mem() and show_free_areas() to suppress output in
  * various contexts.
  */
-#define SHOW_MEM_FILTER_NODES   (0x0001u)       /* filter disallowed nodes */
+#define SHOW_MEM_FILTER_NODES           (0x0001u)       /* disallowed nodes */
+#define SHOW_MEM_FILTER_PAGE_COUNT      (0x0002u)       /* page type count */
 
 extern void show_free_areas(unsigned int flags);
 extern bool skip_free_areas_node(unsigned int flags, int nid);
@@ -1295,6 +1298,61 @@ extern void free_area_init_node(int nid, unsigned long * zones_size,
                 unsigned long zone_start_pfn, unsigned long *zholes_size);
 extern void free_initmem(void);
 
+/*
+ * Free reserved pages within range [PAGE_ALIGN(start), end & PAGE_MASK)
+ * into the buddy system. The freed pages will be poisoned with pattern
+ * "poison" if it's non-zero.
+ * Return pages freed into the buddy system.
+ */
+extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
+                                        int poison, char *s);
+#ifdef  CONFIG_HIGHMEM
+/*
+ * Free a highmem page into the buddy system, adjusting totalhigh_pages
+ * and totalram_pages.
+ */
+extern void free_highmem_page(struct page *page);
+#endif
+
+static inline void adjust_managed_page_count(struct page *page, long count)
+{
+        totalram_pages += count;
+}
+
+/* Free the reserved page into the buddy system, so it gets managed. */
+static inline void __free_reserved_page(struct page *page)
+{
+        ClearPageReserved(page);
+        init_page_count(page);
+        __free_page(page);
+}
+
+static inline void free_reserved_page(struct page *page)
+{
+        __free_reserved_page(page);
+        adjust_managed_page_count(page, 1);
+}
+
+static inline void mark_page_reserved(struct page *page)
+{
+        SetPageReserved(page);
+        adjust_managed_page_count(page, -1);
+}
+
+/*
+ * Default method to free all the __init memory into the buddy system.
+ * The freed pages will be poisoned with pattern "poison" if it is
+ * non-zero. Return pages freed into the buddy system.
+ */
+static inline unsigned long free_initmem_default(int poison)
+{
+        extern char __init_begin[], __init_end[];
+
+        return free_reserved_area(PAGE_ALIGN((unsigned long)&__init_begin) ,
+                                  ((unsigned long)&__init_end) & PAGE_MASK,
+                                  poison, "unused kernel");
+}
+
 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
 /*
  * With CONFIG_HAVE_MEMBLOCK_NODE_MAP set, an architecture may initialise its
@@ -1612,6 +1670,8 @@ int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
                         unsigned long pfn);
 int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
                         unsigned long pfn);
+int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len);
+
 
 struct page *follow_page_mask(struct vm_area_struct *vma,
                               unsigned long address, unsigned int foll_flags,
@@ -1674,8 +1734,12 @@ int in_gate_area_no_mm(unsigned long addr);
 #define in_gate_area(mm, addr) ({(void)mm; in_gate_area_no_mm(addr);})
 #endif  /* __HAVE_ARCH_GATE_AREA */
 
+#ifdef CONFIG_SYSCTL
+extern int sysctl_drop_caches;
 int drop_caches_sysctl_handler(struct ctl_table *, int,
                                         void __user *, size_t *, loff_t *);
+#endif
+
 unsigned long shrink_slab(struct shrink_control *shrink,
                           unsigned long nr_pages_scanned,
                           unsigned long lru_pages);
@@ -1703,12 +1767,12 @@ pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node);
 void *vmemmap_alloc_block(unsigned long size, int node);
 void *vmemmap_alloc_block_buf(unsigned long size, int node);
 void vmemmap_verify(pte_t *, int, unsigned long, unsigned long);
-int vmemmap_populate_basepages(struct page *start_page,
-                                                unsigned long pages, int node);
-int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
+int vmemmap_populate_basepages(unsigned long start, unsigned long end,
+                               int node);
+int vmemmap_populate(unsigned long start, unsigned long end, int node);
 void vmemmap_populate_print_last(void);
 #ifdef CONFIG_MEMORY_HOTPLUG
-void vmemmap_free(struct page *memmap, unsigned long nr_pages);
+void vmemmap_free(unsigned long start, unsigned long end);
 #endif
 void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
                                   unsigned long size);
@@ -1755,5 +1819,11 @@ static inline unsigned int debug_guardpage_minorder(void) { return 0; }
 static inline bool page_is_guard(struct page *page) { return false; }
 #endif /* CONFIG_DEBUG_PAGEALLOC */
 
+#if MAX_NUMNODES > 1
+void __init setup_nr_node_ids(void);
+#else
+static inline void setup_nr_node_ids(void) {}
+#endif
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */