scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 173 insertions, 0 deletions

diff --git a/Documentation/sphinx/kernel_abi.py b/Documentation/sphinx/kernel_abi.py
new file mode 100644
index 000000000..5667f207d
--- /dev/null
+++ b/Documentation/sphinx/kernel_abi.py
@@ -0,0 +1,173 @@
+# -*- coding: utf-8; mode: python -*-
+# coding=utf-8
+# SPDX-License-Identifier: GPL-2.0
+#
+"""
+    kernel-abi
+    ~~~~~~~~~~
+
+    Implementation of the ``kernel-abi`` reST-directive.
+
+    :copyright:  Copyright (C) 2016  Markus Heiser
+    :copyright:  Copyright (C) 2016-2020  Mauro Carvalho Chehab
+    :maintained-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+    :license:    GPL Version 2, June 1991 see Linux/COPYING for details.
+
+    The ``kernel-abi`` (:py:class:`KernelCmd`) directive calls the
+    AbiParser class to parse the Kernel ABI files.
+
+    Overview of directive's argument and options.
+
+    .. code-block:: rst
+
+        .. kernel-abi:: <ABI directory location>
+            :debug:
+
+    The argument ``<ABI directory location>`` is required. It contains the
+    location of the ABI files to be parsed.
+
+    ``debug``
+      Inserts a code-block with the *raw* reST. Sometimes it is helpful to see
+      what reST is generated.
+
+"""
+
+import os
+import re
+import sys
+
+from docutils import nodes, statemachine
+from docutils.statemachine import ViewList
+from docutils.parsers.rst import directives, Directive
+from sphinx.util.docutils import switch_source_input
+from sphinx.util import logging
+
+srctree = os.path.abspath(os.environ["srctree"])
+sys.path.insert(0, os.path.join(srctree, "tools/lib/python"))
+
+from abi.abi_parser import AbiParser
+
+__version__ = "1.0"
+
+logger = logging.getLogger('kernel_abi')
+path = os.path.join(srctree, "Documentation/ABI")
+
+_kernel_abi = None
+
+def get_kernel_abi():
+    """
+    Initialize kernel_abi global var, if not initialized yet.
+
+    This is needed to avoid warnings during Sphinx module initialization.
+    """
+    global _kernel_abi
+
+    if not _kernel_abi:
+        # Parse ABI symbols only once
+        _kernel_abi = AbiParser(path, logger=logger)
+        _kernel_abi.parse_abi()
+        _kernel_abi.check_issues()
+
+    return _kernel_abi
+
+def setup(app):
+
+    app.add_directive("kernel-abi", KernelCmd)
+    return {
+        "version": __version__,
+        "parallel_read_safe": True,
+        "parallel_write_safe": True
+    }
+
+
+class KernelCmd(Directive):
+    """KernelABI (``kernel-abi``) directive"""
+
+    required_arguments = 1
+    optional_arguments = 3
+    has_content = False
+    final_argument_whitespace = True
+    parser = None
+
+    option_spec = {
+        "debug": directives.flag,
+        "no-symbols": directives.flag,
+        "no-files":  directives.flag,
+    }
+
+    def run(self):
+        kernel_abi = get_kernel_abi()
+
+        doc = self.state.document
+        if not doc.settings.file_insertion_enabled:
+            raise self.warning("docutils: file insertion disabled")
+
+        env = self.state.document.settings.env
+        content = ViewList()
+        node = nodes.section()
+
+        abi_type = self.arguments[0]
+
+        if "no-symbols" in self.options:
+            show_symbols = False
+        else:
+            show_symbols = True
+
+        if "no-files" in self.options:
+            show_file = False
+        else:
+            show_file = True
+
+        tab_width = self.options.get('tab-width',
+                                     self.state.document.settings.tab_width)
+
+        old_f = None
+        n = 0
+        n_sym = 0
+        for msg, f, ln in kernel_abi.doc(show_file=show_file,
+                                            show_symbols=show_symbols,
+                                            filter_path=abi_type):
+            n_sym += 1
+            msg_list = statemachine.string2lines(msg, tab_width,
+                                                 convert_whitespace=True)
+            if "debug" in self.options:
+                lines = [
+                    "", "",  ".. code-block:: rst",
+                    "    :linenos:", ""
+                ]
+                for m in msg_list:
+                    lines.append("    " + m)
+            else:
+                lines = msg_list
+
+            for line in lines:
+                # sphinx counts lines from 0
+                content.append(line, f, ln - 1)
+                n += 1
+
+            if f != old_f:
+                # Add the file to Sphinx build dependencies if the file exists
+                fname = os.path.join(srctree, f)
+                if os.path.isfile(fname):
+                    env.note_dependency(fname)
+
+                old_f = f
+
+            # Sphinx doesn't like to parse big messages. So, let's
+            # add content symbol by symbol
+            if content:
+                self.do_parse(content, node)
+                content = ViewList()
+
+        if show_symbols and not show_file:
+            logger.verbose("%s ABI: %i symbols (%i ReST lines)" % (abi_type, n_sym, n))
+        elif not show_symbols and show_file:
+            logger.verbose("%s ABI: %i files (%i ReST lines)" % (abi_type, n_sym, n))
+        else:
+            logger.verbose("%s ABI: %i data (%i ReST lines)" % (abi_type, n_sym, n))
+
+        return node.children
+
+    def do_parse(self, content, node):
+        with switch_source_input(self.state, content):
+            self.state.nested_parse(content, 0, node, match_titles=1)