Add --resync-filter to the --help output.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14662 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_main.c b/coregrind/m_main.c
index 67ead3e..935d433 100644
--- a/coregrind/m_main.c
+++ b/coregrind/m_main.c
@@ -208,6 +208,8 @@
 "                  NOTE: stack scanning is only available on arm-linux.\n"
 "    --unw-stack-scan-frames=<number>   Max number of frames that can be\n"
 "                  recovered by stack scanning [5]\n"
+"    --resync-filter=no|yes|verbose [yes on MacOS, no on other OSes]\n"
+"              attempt to avoid expensive address-space-resync operations\n"
 "\n";
 
    const HChar usage2[] = 
diff --git a/none/tests/cmdline1.stdout.exp b/none/tests/cmdline1.stdout.exp
index 891c5b7..3837816 100644
--- a/none/tests/cmdline1.stdout.exp
+++ b/none/tests/cmdline1.stdout.exp
@@ -121,6 +121,8 @@
                   NOTE: stack scanning is only available on arm-linux.
     --unw-stack-scan-frames=<number>   Max number of frames that can be
                   recovered by stack scanning [5]
+    --resync-filter=no|yes|verbose [yes on MacOS, no on other OSes]
+              attempt to avoid expensive address-space-resync operations
 
   user options for Nulgrind:
     (none)
diff --git a/none/tests/cmdline2.stdout.exp b/none/tests/cmdline2.stdout.exp
index 4832190..72b2506 100644
--- a/none/tests/cmdline2.stdout.exp
+++ b/none/tests/cmdline2.stdout.exp
@@ -121,6 +121,8 @@
                   NOTE: stack scanning is only available on arm-linux.
     --unw-stack-scan-frames=<number>   Max number of frames that can be
                   recovered by stack scanning [5]
+    --resync-filter=no|yes|verbose [yes on MacOS, no on other OSes]
+              attempt to avoid expensive address-space-resync operations
 
   user options for Nulgrind:
     (none)