1 files changed, 5 insertions, 1 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5411cb7442de..f57e55782d7d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1182,6 +1182,9 @@ static inline void clear_page_pfmemalloc(struct page *page)
 #define VM_FAULT_RETRY  0x0400  /* ->fault blocked, must retry */
 #define VM_FAULT_FALLBACK 0x0800        /* huge page fault failed, fall back to small */
 #define VM_FAULT_DONE_COW   0x1000      /* ->fault has fully handled COW */
+#define VM_FAULT_NEEDDSYNC  0x2000      /* ->fault did not modify page tables
+                                         * and needs fsync() to complete (for
+                                         * synchronous page faults in DAX) */
 
 #define VM_FAULT_ERROR  (VM_FAULT_OOM | VM_FAULT_SIGBUS | VM_FAULT_SIGSEGV | \
                          VM_FAULT_HWPOISON | VM_FAULT_HWPOISON_LARGE | \
@@ -1199,7 +1202,8 @@ static inline void clear_page_pfmemalloc(struct page *page)
         { VM_FAULT_LOCKED,              "LOCKED" }, \
         { VM_FAULT_RETRY,               "RETRY" }, \
         { VM_FAULT_FALLBACK,            "FALLBACK" }, \
-        { VM_FAULT_DONE_COW,            "DONE_COW" }
+        { VM_FAULT_DONE_COW,            "DONE_COW" }, \
+        { VM_FAULT_NEEDDSYNC,           "NEEDDSYNC" }
 
 /* Encode hstate index for a hwpoisoned large page */
 #define VM_FAULT_SET_HINDEX(x) ((x) << 12)