#include <linux/mmzone.h>
#include <linux/rbtree.h>
#include <linux/prio_tree.h>
-#include <linux/mutex.h>
#include <linux/debug_locks.h>
-#include <linux/backing-dev.h>
#include <linux/mm_types.h>
struct mempolicy;
#define sysctl_legacy_va_layout 0
#endif
+extern unsigned long mmap_min_addr;
+
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
* mmap() functions).
*/
-/*
- * This struct defines a memory VMM memory area. There is one of these
- * per VM-area/task. A VM area is any part of the process virtual memory
- * space that has a special rule for the page-fault handlers (ie a shared
- * library, the executable area etc).
- */
-struct vm_area_struct {
- struct mm_struct * vm_mm; /* The address space we belong to. */
- unsigned long vm_start; /* Our start address within vm_mm. */
- unsigned long vm_end; /* The first byte after our end address
- within vm_mm. */
-
- /* linked list of VM areas per task, sorted by address */
- struct vm_area_struct *vm_next;
-
- pgprot_t vm_page_prot; /* Access permissions of this VMA. */
- unsigned long vm_flags; /* Flags, listed below. */
-
- struct rb_node vm_rb;
-
- /*
- * For areas with an address space and backing store,
- * linkage into the address_space->i_mmap prio tree, or
- * linkage to the list of like vmas hanging off its node, or
- * linkage of vma in the address_space->i_mmap_nonlinear list.
- */
- union {
- struct {
- struct list_head list;
- void *parent; /* aligns with prio_tree_node parent */
- struct vm_area_struct *head;
- } vm_set;
-
- struct raw_prio_tree_node prio_tree_node;
- } shared;
-
- /*
- * A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma
- * list, after a COW of one of the file pages. A MAP_SHARED vma
- * can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack
- * or brk vma (with NULL file) can only be in an anon_vma list.
- */
- struct list_head anon_vma_node; /* Serialized by anon_vma->lock */
- struct anon_vma *anon_vma; /* Serialized by page_table_lock */
-
- /* Function pointers to deal with this struct. */
- struct vm_operations_struct * vm_ops;
-
- /* Information about our backing store: */
- unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
- units, *not* PAGE_CACHE_SIZE */
- struct file * vm_file; /* File we map to (can be NULL). */
- void * vm_private_data; /* was vm_pte (shared mem) */
- unsigned long vm_truncate_count;/* truncate_count or restart_addr */
-
-#ifndef CONFIG_MMU
- atomic_t vm_usage; /* refcount (VMAs shared if !MMU) */
-#endif
-#ifdef CONFIG_NUMA
- struct mempolicy *vm_policy; /* NUMA policy for the VMA */
-#endif
-};
-
extern struct kmem_cache *vm_area_cachep;
/*
*/
static inline int get_page_unless_zero(struct page *page)
{
- VM_BUG_ON(PageCompound(page));
+ VM_BUG_ON(PageTail(page));
return atomic_inc_not_zero(&page->_count);
}
+/* Support for virtually mapped pages */
+struct page *vmalloc_to_page(const void *addr);
+unsigned long vmalloc_to_pfn(const void *addr);
+
+/* Determine if an address is within the vmalloc range */
+static inline int is_vmalloc_addr(const void *x)
+{
+ unsigned long addr = (unsigned long)x;
+
+ return addr >= VMALLOC_START && addr < VMALLOC_END;
+}
+
static inline struct page *compound_head(struct page *page)
{
if (unlikely(PageTail(page)))
set_page_section(page, pfn_to_section_nr(pfn));
}
+/*
+ * If a hint addr is less than mmap_min_addr change hint to be as
+ * low as possible but still greater than mmap_min_addr
+ */
+static inline unsigned long round_hint_to_min(unsigned long hint)
+{
+#ifdef CONFIG_SECURITY
+ hint &= PAGE_MASK;
+ if (((void *)hint != NULL) &&
+ (hint < mmap_min_addr))
+ return PAGE_ALIGN(mmap_min_addr);
+#endif
+ return hint;
+}
+
/*
* Some inline functions in vmstat.h depend on page_zone()
*/
VM_BUG_ON(PageSlab(page));
if (unlikely(PageSwapCache(page)))
mapping = &swapper_space;
-#ifdef CONFIG_SLUB
- else if (unlikely(PageSlab(page)))
- mapping = NULL;
-#endif
else if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
mapping = NULL;
return mapping;
extern void show_free_areas(void);
#ifdef CONFIG_SHMEM
-int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *new);
-struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
- unsigned long addr);
int shmem_lock(struct file *file, int lock, struct user_struct *user);
#else
static inline int shmem_lock(struct file *file, int lock,
{
return 0;
}
-
-static inline int shmem_set_policy(struct vm_area_struct *vma,
- struct mempolicy *new)
-{
- return 0;
-}
-
-static inline struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
- unsigned long addr)
-{
- return NULL;
-}
#endif
struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags);
struct vm_area_struct *start_vma, unsigned long start_addr,
unsigned long end_addr, unsigned long *nr_accounted,
struct zap_details *);
+
+/**
+ * mm_walk - callbacks for walk_page_range
+ * @pgd_entry: if set, called for each non-empty PGD (top-level) entry
+ * @pud_entry: if set, called for each non-empty PUD (2nd-level) entry
+ * @pmd_entry: if set, called for each non-empty PMD (3rd-level) entry
+ * @pte_entry: if set, called for each non-empty PTE (4th-level) entry
+ * @pte_hole: if set, called for each hole at all levels
+ *
+ * (see walk_page_range for more details)
+ */
+struct mm_walk {
+ int (*pgd_entry)(pgd_t *, unsigned long, unsigned long, void *);
+ int (*pud_entry)(pud_t *, unsigned long, unsigned long, void *);
+ int (*pmd_entry)(pmd_t *, unsigned long, unsigned long, void *);
+ int (*pte_entry)(pte_t *, unsigned long, unsigned long, void *);
+ int (*pte_hole)(unsigned long, unsigned long, void *);
+};
+
+int walk_page_range(const struct mm_struct *, unsigned long addr,
+ unsigned long end, const struct mm_walk *walk,
+ void *private);
void free_pgd_range(struct mmu_gather **tlb, unsigned long addr,
unsigned long end, unsigned long floor, unsigned long ceiling);
void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *start_vma,
pgprot_t vm_get_page_prot(unsigned long vm_flags);
struct vm_area_struct *find_extend_vma(struct mm_struct *, unsigned long addr);
-struct page *vmalloc_to_page(void *addr);
-unsigned long vmalloc_to_pfn(void *addr);
int remap_pfn_range(struct vm_area_struct *, unsigned long addr,
unsigned long pfn, unsigned long size, pgprot_t);
int vm_insert_page(struct vm_area_struct *, unsigned long addr, struct page *);
}
#endif /* CONFIG_PROC_FS */
-#ifndef CONFIG_DEBUG_PAGEALLOC
+#ifdef CONFIG_DEBUG_PAGEALLOC
+extern int debug_pagealloc_enabled;
+
+extern void kernel_map_pages(struct page *page, int numpages, int enable);
+
+static inline void enable_debug_pagealloc(void)
+{
+ debug_pagealloc_enabled = 1;
+}
+#else
static inline void
kernel_map_pages(struct page *page, int numpages, int enable) {}
+static inline void enable_debug_pagealloc(void)
+{
+}
#endif
extern struct vm_area_struct *get_gate_vma(struct task_struct *tsk);
#endif
const char * arch_vma_name(struct vm_area_struct *vma);
+void print_vma_addr(char *prefix, unsigned long rip);
-struct page *sparse_early_mem_map_populate(unsigned long pnum, int nid);
+struct page *sparse_mem_map_populate(unsigned long pnum, int nid);
pgd_t *vmemmap_pgd_populate(unsigned long addr, int node);
pud_t *vmemmap_pud_populate(pgd_t *pgd, unsigned long addr, int node);
pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node);
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