1 files changed, 27 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 011f43605807..322ec61d0da7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -106,7 +106,7 @@ extern int mmap_rnd_compat_bits __read_mostly;
  * embedding these tags into addresses that point to these memory regions, and
  * checking that the memory and the pointer tags match on memory accesses)
  * redefine this macro to strip tags from pointers.
- * It's defined as noop for arcitectures that don't support memory tagging.
+ * It's defined as noop for architectures that don't support memory tagging.
  */
 #ifndef untagged_addr
 #define untagged_addr(addr) (addr)
@@ -372,6 +372,13 @@ extern unsigned int kobjsize(const void *objp);
 # define VM_GROWSUP	VM_NONE
 #endif
 
+#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_MINOR
+# define VM_UFFD_MINOR_BIT	37
+# define VM_UFFD_MINOR		BIT(VM_UFFD_MINOR_BIT)	/* UFFD minor faults */
+#else /* !CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */
+# define VM_UFFD_MINOR		VM_NONE
+#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */
+
 /* Bits set in the VMA until the stack is in its final location */
 #define VM_STACK_INCOMPLETE_SETUP	(VM_RAND_READ | VM_SEQ_READ)
 
@@ -1134,6 +1141,11 @@ static inline bool is_zone_device_page(const struct page *page)
 }
 #endif
 
+static inline bool is_zone_movable_page(const struct page *page)
+{
+	return page_zonenum(page) == ZONE_MOVABLE;
+}
+
 #ifdef CONFIG_DEV_PAGEMAP_OPS
 void free_devmap_managed_page(struct page *page);
 DECLARE_STATIC_KEY_FALSE(devmap_managed_key);
@@ -1543,6 +1555,20 @@ static inline unsigned long page_to_section(const struct page *page)
 }
 #endif
 
+/* MIGRATE_CMA and ZONE_MOVABLE do not allow pin pages */
+#ifdef CONFIG_MIGRATION
+static inline bool is_pinnable_page(struct page *page)
+{
+	return !(is_zone_movable_page(page) || is_migrate_cma_page(page)) ||
+		is_zero_pfn(page_to_pfn(page));
+}
+#else
+static inline bool is_pinnable_page(struct page *page)
+{
+	return true;
+}
+#endif
+
 static inline void set_page_zone(struct page *page, enum zone_type zone)
 {
 	page->flags &= ~(ZONES_MASK << ZONES_PGSHIFT);