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Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h53
1 files changed, 40 insertions, 13 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 01ecf9e3603c..6d0f827ca4eb 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -46,7 +46,7 @@ extern int sysctl_page_lock_unfairness;
void init_mm_internals(void);
-#ifndef CONFIG_NEED_MULTIPLE_NODES /* Don't use mapnrs, do it properly */
+#ifndef CONFIG_NUMA /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;
static inline void set_max_mapnr(unsigned long limit)
@@ -234,7 +234,11 @@ int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *,
int __add_to_page_cache_locked(struct page *page, struct address_space *mapping,
pgoff_t index, gfp_t gfp, void **shadowp);
+#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP)
#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
+#else
+#define nth_page(page,n) ((page) + (n))
+#endif
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
@@ -1341,7 +1345,7 @@ static inline bool page_needs_cow_for_dma(struct vm_area_struct *vma,
if (!is_cow_mapping(vma->vm_flags))
return false;
- if (!atomic_read(&vma->vm_mm->has_pinned))
+ if (!test_bit(MMF_HAS_PINNED, &vma->vm_mm->flags))
return false;
return page_maybe_dma_pinned(page);
@@ -1850,12 +1854,8 @@ extern int try_to_release_page(struct page * page, gfp_t gfp_mask);
extern void do_invalidatepage(struct page *page, unsigned int offset,
unsigned int length);
-void __set_page_dirty(struct page *, struct address_space *, int warn);
-int __set_page_dirty_nobuffers(struct page *page);
-int __set_page_dirty_no_writeback(struct page *page);
int redirty_page_for_writepage(struct writeback_control *wbc,
struct page *page);
-void account_page_dirtied(struct page *page, struct address_space *mapping);
void account_page_cleaned(struct page *page, struct address_space *mapping,
struct bdi_writeback *wb);
int set_page_dirty(struct page *page);
@@ -2420,7 +2420,7 @@ static inline unsigned long free_initmem_default(int poison)
extern char __init_begin[], __init_end[];
return free_reserved_area(&__init_begin, &__init_end,
- poison, "unused kernel");
+ poison, "unused kernel image (initmem)");
}
static inline unsigned long get_num_physpages(void)
@@ -2460,7 +2460,7 @@ extern void get_pfn_range_for_nid(unsigned int nid,
unsigned long *start_pfn, unsigned long *end_pfn);
extern unsigned long find_min_pfn_with_active_regions(void);
-#ifndef CONFIG_NEED_MULTIPLE_NODES
+#ifndef CONFIG_NUMA
static inline int early_pfn_to_nid(unsigned long pfn)
{
return 0;
@@ -2474,7 +2474,6 @@ extern void set_dma_reserve(unsigned long new_dma_reserve);
extern void memmap_init_range(unsigned long, int, unsigned long,
unsigned long, unsigned long, enum meminit_context,
struct vmem_altmap *, int migratetype);
-extern void memmap_init_zone(struct zone *zone);
extern void setup_per_zone_wmarks(void);
extern int __meminit init_per_zone_wmark_min(void);
extern void mem_init(void);
@@ -2681,17 +2680,45 @@ extern struct vm_area_struct * find_vma(struct mm_struct * mm, unsigned long add
extern struct vm_area_struct * find_vma_prev(struct mm_struct * mm, unsigned long addr,
struct vm_area_struct **pprev);
-/* Look up the first VMA which intersects the interval start_addr..end_addr-1,
- NULL if none. Assume start_addr < end_addr. */
-static inline struct vm_area_struct * find_vma_intersection(struct mm_struct * mm, unsigned long start_addr, unsigned long end_addr)
+/**
+ * find_vma_intersection() - Look up the first VMA which intersects the interval
+ * @mm: The process address space.
+ * @start_addr: The inclusive start user address.
+ * @end_addr: The exclusive end user address.
+ *
+ * Returns: The first VMA within the provided range, %NULL otherwise. Assumes
+ * start_addr < end_addr.
+ */
+static inline
+struct vm_area_struct *find_vma_intersection(struct mm_struct *mm,
+ unsigned long start_addr,
+ unsigned long end_addr)
{
- struct vm_area_struct * vma = find_vma(mm,start_addr);
+ struct vm_area_struct *vma = find_vma(mm, start_addr);
if (vma && end_addr <= vma->vm_start)
vma = NULL;
return vma;
}
+/**
+ * vma_lookup() - Find a VMA at a specific address
+ * @mm: The process address space.
+ * @addr: The user address.
+ *
+ * Return: The vm_area_struct at the given address, %NULL otherwise.
+ */
+static inline
+struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr)
+{
+ struct vm_area_struct *vma = find_vma(mm, addr);
+
+ if (vma && addr < vma->vm_start)
+ vma = NULL;
+
+ return vma;
+}
+
static inline unsigned long vm_start_gap(struct vm_area_struct *vma)
{
unsigned long vm_start = vma->vm_start;