diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index bb3e9b9..186319b 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -107,9 +107,11 @@
         /* fd is accessible and someone else may have closed it */
         if (_PyVerify_fd(fd)) {
             Py_BEGIN_ALLOW_THREADS
+            _Py_BEGIN_SUPPRESS_IPH
             err = close(fd);
             if (err < 0)
                 save_errno = errno;
+            _Py_END_SUPPRESS_IPH
             Py_END_ALLOW_THREADS
         } else {
             save_errno = errno;
@@ -599,11 +601,14 @@
     if (!_PyVerify_fd(self->fd))
         return PyErr_SetFromErrno(PyExc_IOError);
 
+    _Py_BEGIN_SUPPRESS_IPH
 #ifdef MS_WINDOWS
     pos = _lseeki64(self->fd, 0L, SEEK_CUR);
 #else
     pos = lseek(self->fd, 0L, SEEK_CUR);
 #endif
+    _Py_END_SUPPRESS_IPH
+
     if (_Py_fstat_noraise(self->fd, &status) == 0)
         end = status.st_size;
     else
@@ -792,11 +797,13 @@
 
     if (_PyVerify_fd(fd)) {
         Py_BEGIN_ALLOW_THREADS
+        _Py_BEGIN_SUPPRESS_IPH
 #ifdef MS_WINDOWS
         res = _lseeki64(fd, pos, whence);
 #else
         res = lseek(fd, pos, whence);
 #endif
+        _Py_END_SUPPRESS_IPH
         Py_END_ALLOW_THREADS
     } else
         res = -1;
@@ -951,7 +958,12 @@
     if (self->fd < 0)
         return err_closed();
     Py_BEGIN_ALLOW_THREADS
-    res = isatty(self->fd);
+    _Py_BEGIN_SUPPRESS_IPH
+    if (_PyVerify_fd(self->fd))
+        res = isatty(self->fd);
+    else
+        res = 0;
+    _Py_END_SUPPRESS_IPH
     Py_END_ALLOW_THREADS
     return PyBool_FromLong(res);
 }
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index e2ed5f9..c5ba4b7 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -1325,11 +1325,13 @@
      */
     if (fileno != -1 && fileno != 0) {
         /* Ensure that fileno is within the CRT's valid range */
-        if (_PyVerify_fd(fileno) == 0) {
+        if (!_PyVerify_fd(fileno)) {
             PyErr_SetFromErrno(PyExc_OSError);
             return NULL;
         }
+        _Py_BEGIN_SUPPRESS_IPH
         fh = (HANDLE)_get_osfhandle(fileno);
+        _Py_END_SUPPRESS_IPH
         if (fh==(HANDLE)-1) {
             PyErr_SetFromErrno(PyExc_OSError);
             return NULL;
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 724acc6..fcabadd 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -1280,10 +1280,6 @@
     fd = PyObject_AsFileDescriptor(o);
     if (fd < 0)
         return 0;
-    if (!_PyVerify_fd(fd)) {
-        posix_error();
-        return 0;
-    }
     *pointer = fd;
     return 1;
 }
@@ -1294,9 +1290,14 @@
     int res;
     int async_err = 0;
 
+    if (!_PyVerify_fd(fd))
+        return posix_error();
+
     do {
         Py_BEGIN_ALLOW_THREADS
+        _Py_BEGIN_SUPPRESS_IPH
         res = (*func)(fd);
+        _Py_END_SUPPRESS_IPH
         Py_END_ALLOW_THREADS
     } while (res != 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
     if (res != 0)
@@ -4359,6 +4360,7 @@
     int result;
 
     Py_BEGIN_ALLOW_THREADS
+    _Py_BEGIN_SUPPRESS_IPH
 #ifdef MS_WINDOWS
     if (path->wide)
         result = Py_DeleteFileW(path->wide);
@@ -4373,6 +4375,7 @@
 #endif /* HAVE_UNLINKAT */
         result = unlink(path->narrow);
 #endif
+    _Py_END_SUPPRESS_IPH
     Py_END_ALLOW_THREADS
 
     if (result)
@@ -7692,6 +7695,7 @@
     flags |= O_CLOEXEC;
 #endif
 
+    _Py_BEGIN_SUPPRESS_IPH
     do {
         Py_BEGIN_ALLOW_THREADS
 #ifdef MS_WINDOWS
@@ -7707,6 +7711,7 @@
             fd = open(path->narrow, flags, mode);
         Py_END_ALLOW_THREADS
     } while (fd < 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
+    _Py_END_SUPPRESS_IPH
 
     if (fd == -1) {
         if (!async_err)
@@ -7745,7 +7750,9 @@
      * for more details.
      */
     Py_BEGIN_ALLOW_THREADS
+    _Py_BEGIN_SUPPRESS_IPH
     res = close(fd);
+    _Py_END_SUPPRESS_IPH
     Py_END_ALLOW_THREADS
     if (res < 0)
         return posix_error();
@@ -7769,9 +7776,11 @@
 {
     int i;
     Py_BEGIN_ALLOW_THREADS
+    _Py_BEGIN_SUPPRESS_IPH
     for (i = fd_low; i < fd_high; i++)
         if (_PyVerify_fd(i))
             close(i);
+    _Py_END_SUPPRESS_IPH
     Py_END_ALLOW_THREADS
     Py_RETURN_NONE;
 }
@@ -7823,7 +7832,9 @@
      */
 #ifdef MS_WINDOWS
     Py_BEGIN_ALLOW_THREADS
+    _Py_BEGIN_SUPPRESS_IPH
     res = dup2(fd, fd2);
+    _Py_END_SUPPRESS_IPH
     Py_END_ALLOW_THREADS
     if (res < 0)
         return posix_error();
@@ -7957,11 +7968,13 @@
         return -1;
     }
     Py_BEGIN_ALLOW_THREADS
+    _Py_BEGIN_SUPPRESS_IPH
 #ifdef MS_WINDOWS
     result = _lseeki64(fd, position, how);
 #else
     result = lseek(fd, position, how);
 #endif
+    _Py_END_SUPPRESS_IPH
     Py_END_ALLOW_THREADS
     if (result < 0)
         posix_error();
@@ -8168,7 +8181,9 @@
 
     do {
         Py_BEGIN_ALLOW_THREADS
+        _Py_BEGIN_SUPPRESS_IPH
         n = pread(fd, PyBytes_AS_STRING(buffer), length, offset);
+        _Py_END_SUPPRESS_IPH
         Py_END_ALLOW_THREADS
     } while (n < 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
 
@@ -8276,6 +8291,7 @@
         }
     }
 
+    _Py_BEGIN_SUPPRESS_IPH
     do {
         Py_BEGIN_ALLOW_THREADS
 #ifdef __APPLE__
@@ -8285,6 +8301,7 @@
 #endif
         Py_END_ALLOW_THREADS
     } while (ret < 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
+    _Py_END_SUPPRESS_IPH
 
     if (sf.headers != NULL)
         iov_cleanup(sf.headers, hbuf, sf.hdr_cnt);
@@ -8401,9 +8418,13 @@
 os_isatty_impl(PyModuleDef *module, int fd)
 /*[clinic end generated code: output=acec9d3c29d16d33 input=08ce94aa1eaf7b5e]*/
 {
+    int return_value;
     if (!_PyVerify_fd(fd))
         return 0;
-    return isatty(fd);
+    _Py_BEGIN_SUPPRESS_IPH
+    return_value = isatty(fd);
+    _Py_END_SUPPRESS_IPH
+    return return_value;
 }
 
 
@@ -8598,7 +8619,9 @@
 
     do {
         Py_BEGIN_ALLOW_THREADS
+        _Py_BEGIN_SUPPRESS_IPH
         size = pwrite(fd, buffer->buf, (size_t)buffer->len, offset);
+        _Py_END_SUPPRESS_IPH
         Py_END_ALLOW_THREADS
     } while (size < 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
 
@@ -11193,12 +11216,16 @@
 os_get_inheritable_impl(PyModuleDef *module, int fd)
 /*[clinic end generated code: output=36110bb36efaa21e input=89ac008dc9ab6b95]*/
 {
-    if (!_PyVerify_fd(fd)){
+    int return_value;
+    if (!_PyVerify_fd(fd)) {
         posix_error();
         return -1;
     }
 
-    return _Py_get_inheritable(fd);
+    _Py_BEGIN_SUPPRESS_IPH
+    return_value = _Py_get_inheritable(fd);
+    _Py_END_SUPPRESS_IPH
+    return return_value;
 }
 
 
@@ -11215,10 +11242,14 @@
 os_set_inheritable_impl(PyModuleDef *module, int fd, int inheritable)
 /*[clinic end generated code: output=2ac5c6ce8623f045 input=9ceaead87a1e2402]*/
 {
+    int result;
     if (!_PyVerify_fd(fd))
         return posix_error();
 
-    if (_Py_set_inheritable(fd, inheritable, NULL) < 0)
+    _Py_BEGIN_SUPPRESS_IPH
+    result = _Py_set_inheritable(fd, inheritable, NULL);
+    _Py_END_SUPPRESS_IPH
+    if (result < 0)
         return NULL;
     Py_RETURN_NONE;
 }
@@ -11289,7 +11320,9 @@
     if (!_PyVerify_fd(fd))
         return posix_error();
 
+    _Py_BEGIN_SUPPRESS_IPH
     blocking = _Py_get_blocking(fd);
+    _Py_END_SUPPRESS_IPH
     if (blocking < 0)
         return NULL;
     return PyBool_FromLong(blocking);
@@ -11305,7 +11338,7 @@
 static PyObject*
 posix_set_blocking(PyObject *self, PyObject *args)
 {
-    int fd, blocking;
+    int fd, blocking, result;
 
     if (!PyArg_ParseTuple(args, "ii:set_blocking", &fd, &blocking))
         return NULL;
@@ -11313,7 +11346,10 @@
     if (!_PyVerify_fd(fd))
         return posix_error();
 
-    if (_Py_set_blocking(fd, blocking) < 0)
+    _Py_BEGIN_SUPPRESS_IPH
+    result = _Py_set_blocking(fd, blocking);
+    _Py_END_SUPPRESS_IPH
+    if (result < 0)
         return NULL;
     Py_RETURN_NONE;
 }