[PATCH 2/2] userfaultfd.2: fix userfaultfd_demo output

[Nadav Amit <nadav.amit@gmail.com>]

From: Nadav Amit <namit@vmware.com>

A bug in the kernel caused in recent version a different output (masked
offset). Update the output of the demo program accordingly.

Signed-off-by: Nadav Amit <namit@vmware.com>
---
 man2/userfaultfd.2 | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/man2/userfaultfd.2 b/man2/userfaultfd.2
index cee7c01d2..779ff8817 100644
--- a/man2/userfaultfd.2
+++ b/man2/userfaultfd.2
@@ -648,7 +648,7 @@ Address returned by mmap() = 0x7fd30106c000
 
 fault_handler_thread():
     poll() returns: nready = 1; POLLIN = 1; POLLERR = 0
-    UFFD_EVENT_PAGEFAULT event: flags = 0; address = 7fd30106c00f
+    UFFD_EVENT_PAGEFAULT event: flags = 0; address = 7fd30106c000
         (uffdio_copy.copy returned 4096)
 Read address 0x7fd30106c00f in main(): A
 Read address 0x7fd30106c40f in main(): A
@@ -657,7 +657,7 @@ Read address 0x7fd30106cc0f in main(): A
 
 fault_handler_thread():
     poll() returns: nready = 1; POLLIN = 1; POLLERR = 0
-    UFFD_EVENT_PAGEFAULT event: flags = 0; address = 7fd30106d00f
+    UFFD_EVENT_PAGEFAULT event: flags = 0; address = 7fd30106d000
         (uffdio_copy.copy returned 4096)
 Read address 0x7fd30106d00f in main(): B
 Read address 0x7fd30106d40f in main(): B
@@ -666,7 +666,7 @@ Read address 0x7fd30106dc0f in main(): B
 
 fault_handler_thread():
     poll() returns: nready = 1; POLLIN = 1; POLLERR = 0
-    UFFD_EVENT_PAGEFAULT event: flags = 0; address = 7fd30106e00f
+    UFFD_EVENT_PAGEFAULT event: flags = 0; address = 7fd30106e000
         (uffdio_copy.copy returned 4096)
 Read address 0x7fd30106e00f in main(): C
 Read address 0x7fd30106e40f in main(): C
-- 
2.25.1