5 files changed, 35 insertions, 18 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 92188b0225bb..51744bcf74ee 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -484,6 +484,7 @@ extern int irq_chip_set_affinity_parent(struct irq_data *data,
 extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
 extern int irq_chip_set_vcpu_affinity_parent(struct irq_data *data,
                                              void *vcpu_info);
+extern int irq_chip_set_type_parent(struct irq_data *data, unsigned int type);
 #endif
 
 /* Handling of unhandled and spurious interrupts: */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 2e872f92dbac..bf6f117fcf4d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1003,6 +1003,34 @@ static inline int page_mapped(struct page *page)
 }
 
 /*
+ * Return true only if the page has been allocated with
+ * ALLOC_NO_WATERMARKS and the low watermark was not
+ * met implying that the system is under some pressure.
+ */
+static inline bool page_is_pfmemalloc(struct page *page)
+{
+        /*
+         * Page index cannot be this large so this must be
+         * a pfmemalloc page.
+         */
+        return page->index == -1UL;
+}
+
+/*
+ * Only to be called by the page allocator on a freshly allocated
+ * page.
+ */
+static inline void set_page_pfmemalloc(struct page *page)
+{
+        page->index = -1UL;
+}
+
+static inline void clear_page_pfmemalloc(struct page *page)
+{
+        page->index = 0;
+}
+
+/*
  * Different kinds of faults, as returned by handle_mm_fault().
  * Used to decide whether a process gets delivered SIGBUS or
  * just gets major/minor fault counters bumped up.
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 0038ac7466fd..15549578d559 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -63,15 +63,6 @@ struct page {
                 union {
                         pgoff_t index;          /* Our offset within mapping. */
                         void *freelist;         /* sl[aou]b first free object */
-                        bool pfmemalloc;        /* If set by the page allocator,
-                                                 * ALLOC_NO_WATERMARKS was set
-                                                 * and the low watermark was not
-                                                 * met implying that the system
-                                                 * is under some pressure. The
-                                                 * caller should try ensure
-                                                 * this page is only used to
-                                                 * free other pages.
-                                                 */
                 };
 
                 union {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8a0321a8fb59..860c751810fc 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1202,6 +1202,7 @@ struct msix_entry {
         u16     entry;  /* driver uses to specify entry, OS writes */
 };
 
+void pci_msi_setup_pci_dev(struct pci_dev *dev);
 
 #ifdef CONFIG_PCI_MSI
 int pci_msi_vec_count(struct pci_dev *dev);
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 22b6d9ca1654..9b88536487e6 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1602,20 +1602,16 @@ static inline void __skb_fill_page_desc(struct sk_buff *skb, int i,
         skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
         /*
-         * Propagate page->pfmemalloc to the skb if we can. The problem is
-         * that not all callers have unique ownership of the page. If
-         * pfmemalloc is set, we check the mapping as a mapping implies
-         * page->index is set (index and pfmemalloc share space).
-         * If it's a valid mapping, we cannot use page->pfmemalloc but we
-         * do not lose pfmemalloc information as the pages would not be
-         * allocated using __GFP_MEMALLOC.
+         * Propagate page pfmemalloc to the skb if we can. The problem is
+         * that not all callers have unique ownership of the page but rely
+         * on page_is_pfmemalloc doing the right thing(tm).
          */
         frag->page.p              = page;
         frag->page_offset         = off;
         skb_frag_size_set(frag, size);
 
         page = compound_head(page);
-        if (page->pfmemalloc && !page->mapping)
+        if (page_is_pfmemalloc(page))
                 skb->pfmemalloc = true;
 }
 
@@ -2263,7 +2259,7 @@ static inline struct page *dev_alloc_page(void)
 static inline void skb_propagate_pfmemalloc(struct page *page,
                                              struct sk_buff *skb)
 {
-        if (page && page->pfmemalloc)
+        if (page_is_pfmemalloc(page))
                 skb->pfmemalloc = true;
 }