2 files changed, 3 insertions, 0 deletions

diff --git a/fs/proc/page.c b/fs/proc/page.c
index 6d8e6a9e93ab..7fcd0d60a968 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -115,6 +115,8 @@ u64 stable_page_flags(struct page *page)
                 u |= 1 << KPF_COMPOUND_TAIL;
         if (PageHuge(page))
                 u |= 1 << KPF_HUGE;
+        else if (PageTransCompound(page))
+                u |= 1 << KPF_THP;
 
         /*
          * Caveats on high order pages: page->_count will only be set
diff --git a/include/linux/kernel-page-flags.h b/include/linux/kernel-page-flags.h
index bd92a89f4b0a..26a65711676f 100644
--- a/include/linux/kernel-page-flags.h
+++ b/include/linux/kernel-page-flags.h
@@ -30,6 +30,7 @@
 #define KPF_NOPAGE              20
 
 #define KPF_KSM                 21
+#define KPF_THP                 22
 
 /* kernel hacking assistances
  * WARNING: subject to change, never rely on them!