From 8e5325b4a7b15828e24c4f29c65d51d1b84bfc3f Mon Sep 17 00:00:00 2001
From: Gareth Rees <grees@undo.io>
Date: Thu, 28 Oct 2021 11:34:29 +0100
Subject: [PATCH] bpo-45643: Add signal.SIGSTKFLT on platforms where this is
 defined.

---
 Doc/library/signal.rst                                 | 10 ++++++++++
 .../Library/2021-10-28-11-40-59.bpo-45643.jeiPiX.rst   |  1 +
 Modules/signalmodule.c                                 |  3 +++
 3 files changed, 14 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2021-10-28-11-40-59.bpo-45643.jeiPiX.rst

diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index 63821866a012bb..abc30362da9e27 100644
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -197,6 +197,16 @@ The variables defined in the :mod:`signal` module are:
 
    Segmentation fault: invalid memory reference.
 
+.. data:: SIGSTKFLT
+
+    Stack fault on coprocessor. The Linux kernel does not raise this signal: it
+    can only be raised in user space.
+
+   .. availability:: Linux, on architectures where the signal is available. See
+      the man page :manpage:`signal(7)` for further information.
+
+   .. versionadded:: 3.11
+
 .. data:: SIGTERM
 
    Termination signal.
diff --git a/Misc/NEWS.d/next/Library/2021-10-28-11-40-59.bpo-45643.jeiPiX.rst b/Misc/NEWS.d/next/Library/2021-10-28-11-40-59.bpo-45643.jeiPiX.rst
new file mode 100644
index 00000000000000..e1592ed53ab25b
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-10-28-11-40-59.bpo-45643.jeiPiX.rst
@@ -0,0 +1 @@
+Added :data:`signal.SIGSTKFLT` on platforms where this signal is defined.
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 09f4aed9d5ca9a..af945a1d5ef676 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -1547,6 +1547,9 @@ signal_add_constants(PyObject *module)
 #ifdef SIGINFO
     ADD_INT_MACRO(SIGINFO);
 #endif
+#ifdef SIGSTKFLT
+    ADD_INT_MACRO(SIGSTKFLT);
+#endif
 
     // ITIMER_xxx constants
 #ifdef ITIMER_REAL