1 files changed, 11 insertions, 47 deletions
diff --git a/Documentation/sphinx/kernel_abi.py b/Documentation/sphinx/kernel_abi.py
index b5feb5b1d905..5911bd0d7965 100644
--- a/Documentation/sphinx/kernel_abi.py
+++ b/Documentation/sphinx/kernel_abi.py
@@ -39,8 +39,6 @@ import sys
 import re
 import kernellog
 
-from os import path
-
 from docutils import nodes, statemachine
 from docutils.statemachine import ViewList
 from docutils.parsers.rst import directives, Directive
@@ -73,60 +71,26 @@ class KernelCmd(Directive):
     }
 
     def run(self):
-
         doc = self.state.document
         if not doc.settings.file_insertion_enabled:
             raise self.warning("docutils: file insertion disabled")
 
-        env = doc.settings.env
-        cwd = path.dirname(doc.current_source)
-        cmd = "get_abi.pl rest --enable-lineno --dir "
-        cmd += self.arguments[0]
-
-        if 'rst' in self.options:
-            cmd += " --rst-source"
+        srctree = os.path.abspath(os.environ["srctree"])
 
-        srctree = path.abspath(os.environ["srctree"])
+        args = [
+            os.path.join(srctree, 'scripts/get_abi.pl'),
+            'rest',
+            '--enable-lineno',
+            '--dir', os.path.join(srctree, 'Documentation', self.arguments[0]),
+        ]
 
-        fname = cmd
-
-        # extend PATH with $(srctree)/scripts
-        path_env = os.pathsep.join([
-            srctree + os.sep + "scripts",
-            os.environ["PATH"]
-        ])
-        shell_env = os.environ.copy()
-        shell_env["PATH"]    = path_env
-        shell_env["srctree"] = srctree
+        if 'rst' in self.options:
+            args.append('--rst-source')
 
-        lines = self.runCmd(cmd, shell=True, cwd=cwd, env=shell_env)
+        lines = subprocess.check_output(args, cwd=os.path.dirname(doc.current_source)).decode('utf-8')
         nodeList = self.nestedParse(lines, self.arguments[0])
         return nodeList
 
-    def runCmd(self, cmd, **kwargs):
-        u"""Run command ``cmd`` and return its stdout as unicode."""
-
-        try:
-            proc = subprocess.Popen(
-                cmd
-                , stdout = subprocess.PIPE
-                , stderr = subprocess.PIPE
-                , **kwargs
-            )
-            out, err = proc.communicate()
-
-            out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
-
-            if proc.returncode != 0:
-                raise self.severe(
-                    u"command '%s' failed with return code %d"
-                    % (cmd, proc.returncode)
-                )
-        except OSError as exc:
-            raise self.severe(u"problems with '%s' directive: %s."
-                              % (self.name, ErrorString(exc)))
-        return out
-
     def nestedParse(self, lines, fname):
         env = self.state.document.settings.env
         content = ViewList()
@@ -138,7 +102,7 @@ class KernelCmd(Directive):
                 code_block += "\n    " + l
             lines = code_block + "\n\n"
 
-        line_regex = re.compile("^\.\. LINENO (\S+)\#([0-9]+)$")
+        line_regex = re.compile(r"^\.\. LINENO (\S+)\#([0-9]+)$")
         ln = 0
         n = 0
         f = fname