#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/string.h>
#include <errno.h>
#include <unistd.h>
#include "fs.h"

#include "tracing_path.h"


char tracing_mnt[PATH_MAX]         = "/sys/kernel/debug";
char tracing_path[PATH_MAX]        = "/sys/kernel/debug/tracing";
char tracing_events_path[PATH_MAX] = "/sys/kernel/debug/tracing/events";


static void __tracing_path_set(const char *tracing, const char *mountpoint)
{
	snprintf(tracing_mnt, sizeof(tracing_mnt), "%s", mountpoint);
	snprintf(tracing_path, sizeof(tracing_path), "%s/%s",
		 mountpoint, tracing);
	snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s%s",
		 mountpoint, tracing, "events");
}

static const char *tracing_path_tracefs_mount(void)
{
	const char *mnt;

	mnt = tracefs__mount();
	if (!mnt)
		return NULL;

	__tracing_path_set("", mnt);

	return mnt;
}

static const char *tracing_path_debugfs_mount(void)
{
	const char *mnt;

	mnt = debugfs__mount();
	if (!mnt)
		return NULL;

	__tracing_path_set("tracing/", mnt);

	return mnt;
}

const char *tracing_path_mount(void)
{
	const char *mnt;

	mnt = tracing_path_tracefs_mount();
	if (mnt)
		return mnt;

	mnt = tracing_path_debugfs_mount();

	return mnt;
}

void tracing_path_set(const char *mntpt)
{
	__tracing_path_set("tracing/", mntpt);
}

char *get_tracing_file(const char *name)
{
	char *file;

	if (asprintf(&file, "%s/%s", tracing_path, name) < 0)
		return NULL;

	return file;
}

void put_tracing_file(char *file)
{
	free(file);
}

static int strerror_open(int err, char *buf, size_t size, const char *filename)
{
	char sbuf[128];

	switch (err) {
	case ENOENT:
		/*
		 * We will get here if we can't find the tracepoint, but one of
		 * debugfs or tracefs is configured, which means you probably
		 * want some tracepoint which wasn't compiled in your kernel.
		 * - jirka
		 */
		if (debugfs__configured() || tracefs__configured()) {
			snprintf(buf, size,
				 "Error:\tFile %s/%s not found.\n"
				 "Hint:\tPerhaps this kernel misses some CONFIG_ setting to enable this feature?.\n",
				 tracing_events_path, filename);
			break;
		}
		snprintf(buf, size, "%s",
			 "Error:\tUnable to find debugfs/tracefs\n"
			 "Hint:\tWas your kernel compiled with debugfs/tracefs support?\n"
			 "Hint:\tIs the debugfs/tracefs filesystem mounted?\n"
			 "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
		break;
	case EACCES: {
		snprintf(buf, size,
			 "Error:\tNo permissions to read %s/%s\n"
			 "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
			 tracing_events_path, filename, tracing_mnt);
	}
		break;
	default:
		snprintf(buf, size, "%s", str_error_r(err, sbuf, sizeof(sbuf)));
		break;
	}

	return 0;
}

int tracing_path__strerror_open_tp(int err, char *buf, size_t size, const char *sys, const char *name)
{
	char path[PATH_MAX];

	snprintf(path, PATH_MAX, "%s/%s", sys, name ?: "*");

	return strerror_open(err, buf, size, path);
}
/linux/net-next.git/commit/sound?h=nds-private-remove&amp;id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?h=nds-private-remove&amp;id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>soc</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='530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'/><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>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-12-21 20:19:53 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-12-25 10:47:43 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?h=nds-private-remove&amp;id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc?id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>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=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>3f8da3a319b88466effa991910c568d038ecfa4b</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc?h=nds-private-remove&amp;id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>sound/soc</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?h=nds-private-remove&amp;id=7b737965b33188bd3dbb44e938535c4006d97fbb'>7b737965b33188bd3dbb44e938535c4006d97fbb</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc?h=nds-private-remove&amp;id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f&amp;id2=7b737965b33188bd3dbb44e938535c4006d97fbb'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions</div><div class='commit-msg'>hotcpu_notifier(), cpu_notifier(), __hotcpu_notifier(), __cpu_notifier(),
register_hotcpu_notifier(), register_cpu_notifier(),
__register_hotcpu_notifier(), __register_cpu_notifier(),
unregister_hotcpu_notifier(), unregister_cpu_notifier(),
__unregister_hotcpu_notifier(), __unregister_cpu_notifier()

are unused now. Remove them and all related code.

Remove also the now pointless cpu notifier error injection mechanism. The
states can be executed step by step and error rollback is the same as cpu
down, so any state transition can be tested w/o requiring the notifier
error injection.

Some CPU hotplug states are kept as they are (ab)used for hotplug state
tracking.

Signed-off-by: Sebastian Andrzej Siewior &lt;bigeasy@linutronix.de&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: Peter Zijlstra &lt;peterz@infradead.org&gt;
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20161221192112.005642358@linutronix.de
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=530e9b76ae8f863dfdef4a6ad0b38613d32e8c3f'>Diffstat</a> (limited to 'sound/soc')</div><table summary='diffstat' class='diffstat'>