extern bool is_free_buddy_page(struct page *page);
#endif
+#if defined CONFIG_COMPACTION || defined CONFIG_CMA
+
+/*
+ * in mm/compaction.c
+ */
+/*
+ * compact_control is used to track pages being migrated and the free pages
+ * they are being migrated to during memory compaction. The free_pfn starts
+ * at the end of a zone and migrate_pfn begins at the start. Movable pages
+ * are moved to the end of a zone during a compaction run and the run
+ * completes when free_pfn <= migrate_pfn
+ */
+struct compact_control {
+ struct list_head freepages; /* List of free pages to migrate to */
+ struct list_head migratepages; /* List of pages being migrated */
+ unsigned long nr_freepages; /* Number of isolated free pages */
+ unsigned long nr_migratepages; /* Number of pages to migrate */
+ unsigned long free_pfn; /* isolate_freepages search base */
+ unsigned long migrate_pfn; /* isolate_migratepages search base */
+ bool sync; /* Synchronous migration */
+
+ int order; /* order a direct compactor needs */
+ int migratetype; /* MOVABLE, RECLAIMABLE etc */
+ struct zone *zone;
+};
+
+unsigned long
+isolate_freepages_range(unsigned long start_pfn, unsigned long end_pfn);
+unsigned long
+isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
+ unsigned long low_pfn, unsigned long end_pfn);
+
+#endif
/*
* function for dealing with page's order in buddy system.
* to determine if it's being mapped into a LOCKED vma.
* If so, mark page as mlocked.
*/
-static inline int is_mlocked_vma(struct vm_area_struct *vma, struct page *page)
+static inline int mlocked_vma_newpage(struct vm_area_struct *vma,
+ struct page *page)
{
VM_BUG_ON(PageLRU(page));
struct vm_area_struct *vma);
#endif
#else /* !CONFIG_MMU */
-static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
+static inline int mlocked_vma_newpage(struct vm_area_struct *v, struct page *p)
{
return 0;
}
extern u64 hwpoison_filter_flags_value;
extern u64 hwpoison_filter_memcg;
extern u32 hwpoison_filter_enable;
+
+extern unsigned long vm_mmap_pgoff(struct file *, unsigned long,
+ unsigned long, unsigned long,
+ unsigned long, unsigned long);