/* * Context.c. Python interfaces for perf script. * * Copyright (C) 2010 Tom Zanussi * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include "../../../perf.h" #include "../../../util/trace-event.h" PyMODINIT_FUNC initperf_trace_context(void); static PyObject *perf_trace_context_common_pc(PyObject *obj, PyObject *args) { static struct scripting_context *scripting_context; PyObject *context; int retval; if (!PyArg_ParseTuple(args, "O", &context)) return NULL; scripting_context = PyCObject_AsVoidPtr(context); retval = common_pc(scripting_context); return Py_BuildValue("i", retval); } static PyObject *perf_trace_context_common_flags(PyObject *obj, PyObject *args) { static struct scripting_context *scripting_context; PyObject *context; int retval; if (!PyArg_ParseTuple(args, "O", &context)) return NULL; scripting_context = PyCObject_AsVoidPtr(context); retval = common_flags(scripting_context); return Py_BuildValue("i", retval); } static PyObject *perf_trace_context_common_lock_depth(PyObject *obj, PyObject *args) { static struct scripting_context *scripting_context; PyObject *context; int retval; if (!PyArg_ParseTuple(args, "O", &context)) return NULL; scripting_context = PyCObject_AsVoidPtr(context); retval = common_lock_depth(scripting_context); return Py_BuildValue("i", retval); } static PyMethodDef ContextMethods[] = { { "common_pc", perf_trace_context_common_pc, METH_VARARGS, "Get the common preempt count event field value."}, { "common_flags", perf_trace_context_common_flags, METH_VARARGS, "Get the common flags event field value."}, { "common_lock_depth", perf_trace_context_common_lock_depth, METH_VARARGS, "Get the common lock depth event field value."}, { NULL, NULL, 0, NULL} }; PyMODINIT_FUNC initperf_trace_context(void) { (void) Py_InitModule("perf_trace_context", ContextMethods); } ption>
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authorTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
committerTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
commit07cd12945551b63ecb1a349d50a6d69d1d6feb4a (patch)
tree75f65eba7eac9277971082a2d5a4cf1370562c0c /drivers/usb/musb/Makefile
parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems before the new cgroup is associated with it kernfs_node. This is fine for cgroup proper but cgroup_name/path() depend on the associated kernfs_node and if a subsystem makes the new cgroup_subsys_state visible, which they're allowed to after onlining, it can lead to NULL dereference. The current code performs cgroup creation and subsystem onlining in cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems visible afterwards. There's no reason to online the subsystems early and we can simply drop cgroup_apply_control_enable() call from cgroup_create() so that the subsystems are onlined and made visible at the same time. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") Cc: stable@vger.kernel.org # v4.6+
Diffstat (limited to 'drivers/usb/musb/Makefile')