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@@ -73,10 +73,27 @@ static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
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}
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#ifndef __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
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+/**
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+ * __alloc_zeroed_user_highpage - Allocate a zeroed HIGHMEM page for a VMA with caller-specified movable GFP flags
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+ * @movableflags: The GFP flags related to the pages future ability to move like __GFP_MOVABLE
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+ * @vma: The VMA the page is to be allocated for
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+ * @vaddr: The virtual address the page will be inserted into
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+ *
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+ * This function will allocate a page for a VMA but the caller is expected
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+ * to specify via movableflags whether the page will be movable in the
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+ * future or not
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+ *
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+ * An architecture may override this function by defining
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+ * __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE and providing their own
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+ * implementation.
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+ */
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static inline struct page *
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-alloc_zeroed_user_highpage(struct vm_area_struct *vma, unsigned long vaddr)
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+__alloc_zeroed_user_highpage(gfp_t movableflags,
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+ struct vm_area_struct *vma,
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+ unsigned long vaddr)
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{
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- struct page *page = alloc_page_vma(GFP_HIGHUSER, vma, vaddr);
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+ struct page *page = alloc_page_vma(GFP_HIGHUSER | movableflags,
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+ vma, vaddr);
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if (page)
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clear_user_highpage(page, vaddr);
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@@ -85,6 +102,36 @@ alloc_zeroed_user_highpage(struct vm_area_struct *vma, unsigned long vaddr)
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}
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#endif
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+/**
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+ * alloc_zeroed_user_highpage - Allocate a zeroed HIGHMEM page for a VMA
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+ * @vma: The VMA the page is to be allocated for
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+ * @vaddr: The virtual address the page will be inserted into
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+ *
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+ * This function will allocate a page for a VMA that the caller knows will
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+ * not be able to move in the future using move_pages() or reclaim. If it
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+ * is known that the page can move, use alloc_zeroed_user_highpage_movable
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+ */
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+static inline struct page *
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+alloc_zeroed_user_highpage(struct vm_area_struct *vma, unsigned long vaddr)
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+{
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+ return __alloc_zeroed_user_highpage(0, vma, vaddr);
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+}
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+
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+/**
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+ * alloc_zeroed_user_highpage_movable - Allocate a zeroed HIGHMEM page for a VMA that the caller knows can move
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+ * @vma: The VMA the page is to be allocated for
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+ * @vaddr: The virtual address the page will be inserted into
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+ *
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+ * This function will allocate a page for a VMA that the caller knows will
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+ * be able to migrate in the future using move_pages() or reclaimed
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+ */
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+static inline struct page *
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+alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma,
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+ unsigned long vaddr)
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+{
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+ return __alloc_zeroed_user_highpage(__GFP_MOVABLE, vma, vaddr);
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+}
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+
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static inline void clear_highpage(struct page *page)
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{
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void *kaddr = kmap_atomic(page, KM_USER0);
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