#undef TRACE_SYSTEM
#define TRACE_SYSTEM wbt

#if !defined(_TRACE_WBT_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_WBT_H

#include <linux/tracepoint.h>
#include "../../../block/blk-wbt.h"

/**
 * wbt_stat - trace stats for blk_wb
 * @stat: array of read/write stats
 */
TRACE_EVENT(wbt_stat,

	TP_PROTO(struct backing_dev_info *bdi, struct blk_rq_stat *stat),

	TP_ARGS(bdi, stat),

	TP_STRUCT__entry(
		__array(char, name, 32)
		__field(s64, rmean)
		__field(u64, rmin)
		__field(u64, rmax)
		__field(s64, rnr_samples)
		__field(s64, rtime)
		__field(s64, wmean)
		__field(u64, wmin)
		__field(u64, wmax)
		__field(s64, wnr_samples)
		__field(s64, wtime)
	),

	TP_fast_assign(
		strncpy(__entry->name, dev_name(bdi->dev), 32);
		__entry->rmean		= stat[0].mean;
		__entry->rmin		= stat[0].min;
		__entry->rmax		= stat[0].max;
		__entry->rnr_samples	= stat[0].nr_samples;
		__entry->wmean		= stat[1].mean;
		__entry->wmin		= stat[1].min;
		__entry->wmax		= stat[1].max;
		__entry->wnr_samples	= stat[1].nr_samples;
	),

	TP_printk("%s: rmean=%llu, rmin=%llu, rmax=%llu, rsamples=%llu, "
		  "wmean=%llu, wmin=%llu, wmax=%llu, wsamples=%llu\n",
		  __entry->name, __entry->rmean, __entry->rmin, __entry->rmax,
		  __entry->rnr_samples, __entry->wmean, __entry->wmin,
		  __entry->wmax, __entry->wnr_samples)
);

/**
 * wbt_lat - trace latency event
 * @lat: latency trigger
 */
TRACE_EVENT(wbt_lat,

	TP_PROTO(struct backing_dev_info *bdi, unsigned long lat),

	TP_ARGS(bdi, lat),

	TP_STRUCT__entry(
		__array(char, name, 32)
		__field(unsigned long, lat)
	),

	TP_fast_assign(
		strncpy(__entry->name, dev_name(bdi->dev), 32);
		__entry->lat = div_u64(lat, 1000);
	),

	TP_printk("%s: latency %lluus\n", __entry->name,
			(unsigned long long) __entry->lat)
);

/**
 * wbt_step - trace wb event step
 * @msg: context message
 * @step: the current scale step count
 * @window: the current monitoring window
 * @bg: the current background queue limit
 * @normal: the current normal writeback limit
 * @max: the current max throughput writeback limit
 */
TRACE_EVENT(wbt_step,

	TP_PROTO(struct backing_dev_info *bdi, const char *msg,
		 int step, unsigned long window, unsigned int bg,
		 unsigned int normal, unsigned int max),

	TP_ARGS(bdi, msg, step, window, bg, normal, max),

	TP_STRUCT__entry(
		__array(char, name, 32)
		__field(const char *, msg)
		__field(int, step)
		__field(unsigned long, window)
		__field(unsigned int, bg)
		__field(unsigned int, normal)
		__field(unsigned int, max)
	),

	TP_fast_assign(
		strncpy(__entry->name, dev_name(bdi->dev), 32);
		__entry->msg	= msg;
		__entry->step	= step;
		__entry->window	= div_u64(window, 1000);
		__entry->bg	= bg;
		__entry->normal	= normal;
		__entry->max	= max;
	),

	TP_printk("%s: %s: step=%d, window=%luus, background=%u, normal=%u, max=%u\n",
		  __entry->name, __entry->msg, __entry->step, __entry->window,
		  __entry->bg, __entry->normal, __entry->max)
);

/**
 * wbt_timer - trace wb timer event
 * @status: timer state status
 * @step: the current scale step count
 * @inflight: tracked writes inflight
 */
TRACE_EVENT(wbt_timer,

	TP_PROTO(struct backing_dev_info *bdi, unsigned int status,
		 int step, unsigned int inflight),

	TP_ARGS(bdi, status, step, inflight),

	TP_STRUCT__entry(
		__array(char, name, 32)
		__field(unsigned int, status)
		__field(int, step)
		__field(unsigned int, inflight)
	),

	TP_fast_assign(
		strncpy(__entry->name, dev_name(bdi->dev), 32);
		__entry->status		= status;
		__entry->step		= step;
		__entry->inflight	= inflight;
	),

	TP_printk("%s: status=%u, step=%d, inflight=%u\n", __entry->name,
		  __entry->status, __entry->step, __entry->inflight)
);

#endif /* _TRACE_WBT_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
n><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/drivers/usb/renesas_usbhs/fifo.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>07cd12945551b63ecb1a349d50a6d69d1d6feb4a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/renesas_usbhs/fifo.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/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>75f65eba7eac9277971082a2d5a4cf1370562c0c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/renesas_usbhs/fifo.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>drivers/usb/renesas_usbhs/fifo.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/renesas_usbhs/fifo.c?id=7ce7d89f48834cefece7804d38fc5d85382edf77'>7ce7d89f48834cefece7804d38fc5d85382edf77</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/renesas_usbhs/fifo.c?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/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>Diffstat</a> (limited to 'drivers/usb/renesas_usbhs/fifo.c')</div><table summary='diffstat' class='diffstat'>