mm/hwpoison: introduce put_hwpoison_page to put refcount for memory error handling

[deliverable/linux.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index dfb7ce05f1e3342eae69aa12fe4fdb31ac79d1ab..11df1a8ea38bd81c0f428fb625e481dddb30482f 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -249,6 +249,8 @@ struct vm_operations_struct {
        void (*close)(struct vm_area_struct * area);
        int (*mremap)(struct vm_area_struct * area);
        int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf);
+       int (*pmd_fault)(struct vm_area_struct *, unsigned long address,
+                                               pmd_t *, unsigned int flags);
        void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf);
 
        /* notification that a previously read-only page is about to become
@@ -307,18 +309,6 @@ struct inode;
 #define page_private(page)             ((page)->private)
 #define set_page_private(page, v)      ((page)->private = (v))
 
-/* It's valid only if the page is free path or free_list */
-static inline void set_freepage_migratetype(struct page *page, int migratetype)
-{
-       page->index = migratetype;
-}
-
-/* It's valid only if the page is free path or free_list */
-static inline int get_freepage_migratetype(struct page *page)
-{
-       return page->index;
-}
-
 /*
  * FIXME: take this include out, include page-flags.h in
  * files which need it (119 of them)
@@ -359,18 +349,6 @@ static inline int get_page_unless_zero(struct page *page)
        return atomic_inc_not_zero(&page->_count);
 }
 
-/*
- * Try to drop a ref unless the page has a refcount of one, return false if
- * that is the case.
- * This is to make sure that the refcount won't become zero after this drop.
- * This can be called when MMU is off so it must not access
- * any of the virtual mappings.
- */
-static inline int put_page_unless_one(struct page *page)
-{
-       return atomic_add_unless(&page->_count, -1, 1);
-}
-
 extern int page_is_ram(unsigned long pfn);
 extern int region_is_ram(resource_size_t phys_addr, unsigned long size);
 
@@ -2191,6 +2169,7 @@ extern int memory_failure(unsigned long pfn, int trapno, int flags);
 extern void memory_failure_queue(unsigned long pfn, int trapno, int flags);
 extern int unpoison_memory(unsigned long pfn);
 extern int get_hwpoison_page(struct page *page);
+extern void put_hwpoison_page(struct page *page);
 extern int sysctl_memory_failure_early_kill;
 extern int sysctl_memory_failure_recovery;
 extern void shake_page(struct page *p, int access);