/*****************************************************************************

    AudioScience HPI driver
    Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    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

Debug macros.

*****************************************************************************/

#ifndef _HPIDEBUG_H
#define _HPIDEBUG_H

#include "hpi_internal.h"

/* Define debugging levels.  */
enum { HPI_DEBUG_LEVEL_ERROR = 0,	/* always log errors */
	HPI_DEBUG_LEVEL_WARNING = 1,
	HPI_DEBUG_LEVEL_NOTICE = 2,
	HPI_DEBUG_LEVEL_INFO = 3,
	HPI_DEBUG_LEVEL_DEBUG = 4,
	HPI_DEBUG_LEVEL_VERBOSE = 5	/* same printk level as DEBUG */
};

#define HPI_DEBUG_LEVEL_DEFAULT HPI_DEBUG_LEVEL_NOTICE

/* an OS can define an extra flag string that is appended to
   the start of each message, eg see linux kernel hpios.h */

#ifdef SOURCEFILE_NAME
#define FILE_LINE  SOURCEFILE_NAME ":" __stringify(__LINE__) " "
#else
#define FILE_LINE  __FILE__ ":" __stringify(__LINE__) " "
#endif

#define HPI_DEBUG_ASSERT(expression) \
	do { \
		if (!(expression)) { \
			printk(KERN_ERR  FILE_LINE \
				"ASSERT " __stringify(expression)); \
		} \
	} while (0)

#define HPI_DEBUG_LOG(level, ...) \
	do { \
		if (hpi_debug_level >= HPI_DEBUG_LEVEL_##level) { \
			printk(HPI_DEBUG_FLAG_##level \
			FILE_LINE  __VA_ARGS__); \
		} \
	} while (0)

void hpi_debug_init(void);
int hpi_debug_level_set(int level);
int hpi_debug_level_get(void);
/* needed by Linux driver for dynamic debug level changes */
extern int hpi_debug_level;

void hpi_debug_message(struct hpi_message *phm, char *sz_fileline);

void hpi_debug_data(u16 *pdata, u32 len);

#define HPI_DEBUG_DATA(pdata, len) \
	do { \
		if (hpi_debug_level >= HPI_DEBUG_LEVEL_VERBOSE) \
			hpi_debug_data(pdata, len); \
	} while (0)

#define HPI_DEBUG_MESSAGE(level, phm) \
	do { \
		if (hpi_debug_level >= HPI_DEBUG_LEVEL_##level) { \
			hpi_debug_message(phm, HPI_DEBUG_FLAG_##level \
				FILE_LINE __stringify(level)); \
		} \
	} while (0)

#define HPI_DEBUG_RESPONSE(phr) \
	do { \
		if (((hpi_debug_level >= HPI_DEBUG_LEVEL_DEBUG) && \
			(phr->error)) ||\
		(hpi_debug_level >= HPI_DEBUG_LEVEL_VERBOSE)) \
			printk(KERN_DEBUG "HPI_RES%d,%d,%d\n", \
				phr->version, phr->error, phr->specific_error); \
	} while (0)

#ifndef compile_time_assert
#define compile_time_assert(cond, msg) \
    typedef char msg[(cond) ? 1 : -1]
#endif

#endif				/* _HPIDEBUG_H_  */
ef='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>sched</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sched/sch_netem.c?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>sch_netem.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='07cd12945551b63ecb1a349d50a6d69d1d6feb4a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-26 16:47:28 -0500</td></tr>
<tr><th>committer</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-26 16:47:28 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched/sch_netem.c?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>07cd12945551b63ecb1a349d50a6d69d1d6feb4a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sched/sch_netem.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>75f65eba7eac9277971082a2d5a4cf1370562c0c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sched/sch_netem.c?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>net/sched/sch_netem.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched/sch_netem.c?h=nds-private-remove&amp;id=7ce7d89f48834cefece7804d38fc5d85382edf77'>7ce7d89f48834cefece7804d38fc5d85382edf77</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sched/sch_netem.c?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a&amp;id2=7ce7d89f48834cefece7804d38fc5d85382edf77'>diff</a>)</td></tr></table>
<div class='commit-subject'>cgroup: don't online subsystems before cgroup_name/path() are operational</div><div class='commit-msg'>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 &lt;tj@kernel.org&gt;
Reported-by: Konstantin Khlebnikov &lt;khlebnikov@yandex-team.ru&gt;
Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") 
Cc: stable@vger.kernel.org # v4.6+
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>Diffstat</a> (limited to 'net/sched/sch_netem.c')</div><table summary='diffstat' class='diffstat'>