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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/huge_mm.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/huge_mm.h')
-rw-r--r--include/linux/huge_mm.h199
1 files changed, 199 insertions, 0 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
new file mode 100644
index 00000000..c8af7a2e
--- /dev/null
+++ b/include/linux/huge_mm.h
@@ -0,0 +1,199 @@
+#ifndef _LINUX_HUGE_MM_H
+#define _LINUX_HUGE_MM_H
+
+extern int do_huge_pmd_anonymous_page(struct mm_struct *mm,
+ struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmd,
+ unsigned int flags);
+extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm,
+ pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr,
+ struct vm_area_struct *vma);
+extern int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmd,
+ pmd_t orig_pmd);
+extern pgtable_t get_pmd_huge_pte(struct mm_struct *mm);
+extern struct page *follow_trans_huge_pmd(struct mm_struct *mm,
+ unsigned long addr,
+ pmd_t *pmd,
+ unsigned int flags);
+extern int zap_huge_pmd(struct mmu_gather *tlb,
+ struct vm_area_struct *vma,
+ pmd_t *pmd, unsigned long addr);
+extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
+ unsigned long addr, unsigned long end,
+ unsigned char *vec);
+extern int move_huge_pmd(struct vm_area_struct *vma,
+ struct vm_area_struct *new_vma,
+ unsigned long old_addr,
+ unsigned long new_addr, unsigned long old_end,
+ pmd_t *old_pmd, pmd_t *new_pmd);
+extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
+ unsigned long addr, pgprot_t newprot);
+
+enum transparent_hugepage_flag {
+ TRANSPARENT_HUGEPAGE_FLAG,
+ TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
+ TRANSPARENT_HUGEPAGE_DEFRAG_FLAG,
+ TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
+ TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG,
+#ifdef CONFIG_DEBUG_VM
+ TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG,
+#endif
+};
+
+enum page_check_address_pmd_flag {
+ PAGE_CHECK_ADDRESS_PMD_FLAG,
+ PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG,
+ PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG,
+};
+extern pmd_t *page_check_address_pmd(struct page *page,
+ struct mm_struct *mm,
+ unsigned long address,
+ enum page_check_address_pmd_flag flag);
+
+#define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
+#define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER)
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define HPAGE_PMD_SHIFT HPAGE_SHIFT
+#define HPAGE_PMD_MASK HPAGE_MASK
+#define HPAGE_PMD_SIZE HPAGE_SIZE
+
+#define transparent_hugepage_enabled(__vma) \
+ ((transparent_hugepage_flags & \
+ (1<<TRANSPARENT_HUGEPAGE_FLAG) || \
+ (transparent_hugepage_flags & \
+ (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \
+ ((__vma)->vm_flags & VM_HUGEPAGE))) && \
+ !((__vma)->vm_flags & VM_NOHUGEPAGE) && \
+ !is_vma_temporary_stack(__vma))
+#define transparent_hugepage_defrag(__vma) \
+ ((transparent_hugepage_flags & \
+ (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) || \
+ (transparent_hugepage_flags & \
+ (1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG) && \
+ (__vma)->vm_flags & VM_HUGEPAGE))
+#ifdef CONFIG_DEBUG_VM
+#define transparent_hugepage_debug_cow() \
+ (transparent_hugepage_flags & \
+ (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG))
+#else /* CONFIG_DEBUG_VM */
+#define transparent_hugepage_debug_cow() 0
+#endif /* CONFIG_DEBUG_VM */
+
+extern unsigned long transparent_hugepage_flags;
+extern int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
+ pmd_t *dst_pmd, pmd_t *src_pmd,
+ struct vm_area_struct *vma,
+ unsigned long addr, unsigned long end);
+extern int handle_pte_fault(struct mm_struct *mm,
+ struct vm_area_struct *vma, unsigned long address,
+ pte_t *pte, pmd_t *pmd, unsigned int flags);
+extern int split_huge_page(struct page *page);
+extern void __split_huge_page_pmd(struct mm_struct *mm, pmd_t *pmd);
+#define split_huge_page_pmd(__mm, __pmd) \
+ do { \
+ pmd_t *____pmd = (__pmd); \
+ if (unlikely(pmd_trans_huge(*____pmd))) \
+ __split_huge_page_pmd(__mm, ____pmd); \
+ } while (0)
+#define wait_split_huge_page(__anon_vma, __pmd) \
+ do { \
+ pmd_t *____pmd = (__pmd); \
+ anon_vma_lock(__anon_vma); \
+ anon_vma_unlock(__anon_vma); \
+ BUG_ON(pmd_trans_splitting(*____pmd) || \
+ pmd_trans_huge(*____pmd)); \
+ } while (0)
+#if HPAGE_PMD_ORDER > MAX_ORDER
+#error "hugepages can't be allocated by the buddy allocator"
+#endif
+extern int hugepage_madvise(struct vm_area_struct *vma,
+ unsigned long *vm_flags, int advice);
+extern void __vma_adjust_trans_huge(struct vm_area_struct *vma,
+ unsigned long start,
+ unsigned long end,
+ long adjust_next);
+extern int __pmd_trans_huge_lock(pmd_t *pmd,
+ struct vm_area_struct *vma);
+/* mmap_sem must be held on entry */
+static inline int pmd_trans_huge_lock(pmd_t *pmd,
+ struct vm_area_struct *vma)
+{
+ VM_BUG_ON(!rwsem_is_locked(&vma->vm_mm->mmap_sem));
+ if (pmd_trans_huge(*pmd))
+ return __pmd_trans_huge_lock(pmd, vma);
+ else
+ return 0;
+}
+static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
+ unsigned long start,
+ unsigned long end,
+ long adjust_next)
+{
+ if (!vma->anon_vma || vma->vm_ops)
+ return;
+ __vma_adjust_trans_huge(vma, start, end, adjust_next);
+}
+static inline int hpage_nr_pages(struct page *page)
+{
+ if (unlikely(PageTransHuge(page)))
+ return HPAGE_PMD_NR;
+ return 1;
+}
+static inline struct page *compound_trans_head(struct page *page)
+{
+ if (PageTail(page)) {
+ struct page *head;
+ head = page->first_page;
+ smp_rmb();
+ /*
+ * head may be a dangling pointer.
+ * __split_huge_page_refcount clears PageTail before
+ * overwriting first_page, so if PageTail is still
+ * there it means the head pointer isn't dangling.
+ */
+ if (PageTail(page))
+ return head;
+ }
+ return page;
+}
+#else /* CONFIG_TRANSPARENT_HUGEPAGE */
+#define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
+#define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; })
+#define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
+
+#define hpage_nr_pages(x) 1
+
+#define transparent_hugepage_enabled(__vma) 0
+
+#define transparent_hugepage_flags 0UL
+static inline int split_huge_page(struct page *page)
+{
+ return 0;
+}
+#define split_huge_page_pmd(__mm, __pmd) \
+ do { } while (0)
+#define wait_split_huge_page(__anon_vma, __pmd) \
+ do { } while (0)
+#define compound_trans_head(page) compound_head(page)
+static inline int hugepage_madvise(struct vm_area_struct *vma,
+ unsigned long *vm_flags, int advice)
+{
+ BUG();
+ return 0;
+}
+static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
+ unsigned long start,
+ unsigned long end,
+ long adjust_next)
+{
+}
+static inline int pmd_trans_huge_lock(pmd_t *pmd,
+ struct vm_area_struct *vma)
+{
+ return 0;
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
+#endif /* _LINUX_HUGE_MM_H */