/*
 * Stack trace management functions
 *
 *  Copyright IBM Corp. 2006
 *  Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
 */

#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/kallsyms.h>
#include <linux/module.h>

static int __save_address(void *data, unsigned long address, int nosched)
{
	struct stack_trace *trace = data;

	if (nosched && in_sched_functions(address))
		return 0;
	if (trace->skip > 0) {
		trace->skip--;
		return 0;
	}
	if (trace->nr_entries < trace->max_entries) {
		trace->entries[trace->nr_entries++] = address;
		return 0;
	}
	return 1;
}

static int save_address(void *data, unsigned long address, int reliable)
{
	return __save_address(data, address, 0);
}

static int save_address_nosched(void *data, unsigned long address, int reliable)
{
	return __save_address(data, address, 1);
}

void save_stack_trace(struct stack_trace *trace)
{
	unsigned long sp;

	sp = current_stack_pointer();
	dump_trace(save_address, trace, NULL, sp);
	if (trace->nr_entries < trace->max_entries)
		trace->entries[trace->nr_entries++] = ULONG_MAX;
}
EXPORT_SYMBOL_GPL(save_stack_trace);

void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
	unsigned long sp;

	sp = tsk->thread.ksp;
	if (tsk == current)
		sp = current_stack_pointer();
	dump_trace(save_address_nosched, trace, tsk, sp);
	if (trace->nr_entries < trace->max_entries)
		trace->entries[trace->nr_entries++] = ULONG_MAX;
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);

void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
{
	unsigned long sp;

	sp = kernel_stack_pointer(regs);
	dump_trace(save_address, trace, NULL, sp);
	if (trace->nr_entries < trace->max_entries)
		trace->entries[trace->nr_entries++] = ULONG_MAX;
}
EXPORT_SYMBOL_GPL(save_stack_trace_regs);
ef='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='4d8bbbff1227bbb27fdb02b6db17f080c06eedad'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<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='4d8bbbff1227bbb27fdb02b6db17f080c06eedad'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-05-11 12:52:05 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-05-11 12:52:05 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>4d8bbbff1227bbb27fdb02b6db17f080c06eedad</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>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=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>d2c1a2bdc4eac9bdea2c03b088fdf58142e3d9c9</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=50c73890d314921e2097d47e98c2ca59b3876ec7'>50c73890d314921e2097d47e98c2ca59b3876ec7</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad&amp;id2=50c73890d314921e2097d47e98c2ca59b3876ec7'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=e271c7b4420ddbb9fae82a2b31a5ab3edafcf4fe'>e271c7b4420ddbb9fae82a2b31a5ab3edafcf4fe</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad&amp;id2=e271c7b4420ddbb9fae82a2b31a5ab3edafcf4fe'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</div><div class='commit-msg'>Pull networking fixes from David Miller:
 "Hopefully the last round of fixes this release, fingers crossed :)

   1) Initialize static nf_conntrack_locks_all_lock properly, from
      Florian Westphal.

   2) Need to cancel pending work when destroying IDLETIMER entries,
      from Liping Zhang.

   3) Fix TX param usage when sending TSO over iwlwifi devices, from
      Emmanuel Grumbach.

   4) NFACCT quota params not validated properly, from Phil Turnbull.

   5) Resolve more glibc vs.  kernel header conflicts, from Mikko
      Tapeli.

   6) Missing IRQ free in ravb_close(), from Geert Uytterhoeven.

   7) Fix infoleak in x25, from Kangjie Lu.

   8) Similarly in thunderx driver, from Heinrich Schuchardt.

   9) tc_ife.h uapi header not exported properly, from Jamal Hadi Salim.

  10) Don't reenable PHY interreupts if device is in polling mode, from
      Shaohui Xie.

  11) Packet scheduler actions late binding was not being handled
      properly at all, from Jamal Hadi Salim.

  12) Fix binding of conntrack entries to helpers in openvswitch, from
      Joe Stringer"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (21 commits)
  gre: do not keep the GRE header around in collect medata mode
  openvswitch: Fix cached ct with helper.
  net sched: ife action fix late binding
  net sched: skbedit action fix late binding
  net sched: simple action fix late binding
  net sched: mirred action fix late binding
  net sched: ipt action fix late binding
  net sched: vlan action fix late binding
  net: phylib: fix interrupts re-enablement in phy_start
  tcp: refresh skb timestamp at retransmit time
  net: nps_enet: bug fix - handle lost tx interrupts
  net: nps_enet: Tx handler synchronization
  export tc ife uapi header
  net: thunderx: avoid exposing kernel stack
  net: fix a kernel infoleak in x25 module
  ravb: Add missing free_irq() call to ravb_close()
  uapi glibc compat: fix compile errors when glibc net/if.h included before linux/if.h
  netfilter: nfnetlink_acct: validate NFACCT_QUOTA parameter
  iwlwifi: mvm: don't override the rate with the AMSDU len
  netfilter: IDLETIMER: fix race condition when destroy the target
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4d8bbbff1227bbb27fdb02b6db17f080c06eedad'>Diffstat</a></div><table summary='diffstat' class='diffstat'>