#undef TRACE_SYSTEM
#define TRACE_SYSTEM page_ref

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

#include <linux/types.h>
#include <linux/page_ref.h>
#include <linux/tracepoint.h>
#include <trace/events/mmflags.h>

DECLARE_EVENT_CLASS(page_ref_mod_template,

	TP_PROTO(struct page *page, int v),

	TP_ARGS(page, v),

	TP_STRUCT__entry(
		__field(unsigned long, pfn)
		__field(unsigned long, flags)
		__field(int, count)
		__field(int, mapcount)
		__field(void *, mapping)
		__field(int, mt)
		__field(int, val)
	),

	TP_fast_assign(
		__entry->pfn = page_to_pfn(page);
		__entry->flags = page->flags;
		__entry->count = page_ref_count(page);
		__entry->mapcount = page_mapcount(page);
		__entry->mapping = page->mapping;
		__entry->mt = get_pageblock_migratetype(page);
		__entry->val = v;
	),

	TP_printk("pfn=0x%lx flags=%s count=%d mapcount=%d mapping=%p mt=%d val=%d",
		__entry->pfn,
		show_page_flags(__entry->flags & ((1UL << NR_PAGEFLAGS) - 1)),
		__entry->count,
		__entry->mapcount, __entry->mapping, __entry->mt,
		__entry->val)
);

DEFINE_EVENT(page_ref_mod_template, page_ref_set,

	TP_PROTO(struct page *page, int v),

	TP_ARGS(page, v)
);

DEFINE_EVENT(page_ref_mod_template, page_ref_mod,

	TP_PROTO(struct page *page, int v),

	TP_ARGS(page, v)
);

DECLARE_EVENT_CLASS(page_ref_mod_and_test_template,

	TP_PROTO(struct page *page, int v, int ret),

	TP_ARGS(page, v, ret),

	TP_STRUCT__entry(
		__field(unsigned long, pfn)
		__field(unsigned long, flags)
		__field(int, count)
		__field(int, mapcount)
		__field(void *, mapping)
		__field(int, mt)
		__field(int, val)
		__field(int, ret)
	),

	TP_fast_assign(
		__entry->pfn = page_to_pfn(page);
		__entry->flags = page->flags;
		__entry->count = page_ref_count(page);
		__entry->mapcount = page_mapcount(page);
		__entry->mapping = page->mapping;
		__entry->mt = get_pageblock_migratetype(page);
		__entry->val = v;
		__entry->ret = ret;
	),

	TP_printk("pfn=0x%lx flags=%s count=%d mapcount=%d mapping=%p mt=%d val=%d ret=%d",
		__entry->pfn,
		show_page_flags(__entry->flags & ((1UL << NR_PAGEFLAGS) - 1)),
		__entry->count,
		__entry->mapcount, __entry->mapping, __entry->mt,
		__entry->val, __entry->ret)
);

DEFINE_EVENT(page_ref_mod_and_test_template, page_ref_mod_and_test,

	TP_PROTO(struct page *page, int v, int ret),

	TP_ARGS(page, v, ret)
);

DEFINE_EVENT(page_ref_mod_and_test_template, page_ref_mod_and_return,

	TP_PROTO(struct page *page, int v, int ret),

	TP_ARGS(page, v, ret)
);

DEFINE_EVENT(page_ref_mod_and_test_template, page_ref_mod_unless,

	TP_PROTO(struct page *page, int v, int ret),

	TP_ARGS(page, v, ret)
);

DEFINE_EVENT(page_ref_mod_and_test_template, page_ref_freeze,

	TP_PROTO(struct page *page, int v, int ret),

	TP_ARGS(page, v, ret)
);

DEFINE_EVENT(page_ref_mod_template, page_ref_unfreeze,

	TP_PROTO(struct page *page, int v),

	TP_ARGS(page, v)
);

#endif /* _TRACE_PAGE_COUNT_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
nclude/net/netns?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>netns</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='030305d69fc6963c16003f50d7e8d74b02d0a143'/><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>Bjorn Helgaas &lt;bhelgaas@google.com&gt;</td><td class='right'>2017-01-27 15:00:45 -0600</td></tr>
<tr><th>committer</th><td>Bjorn Helgaas &lt;bhelgaas@google.com&gt;</td><td class='right'>2017-01-27 15:00:45 -0600</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/netns?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>030305d69fc6963c16003f50d7e8d74b02d0a143</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/netns?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>363a4e34d199178769b7e7eeb26ea2620a55847b</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/netns?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>include/net/netns</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/netns?id=4d191b1b63c209e37bf27938ef365244d3c41084'>4d191b1b63c209e37bf27938ef365244d3c41084</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/netns?id=030305d69fc6963c16003f50d7e8d74b02d0a143&amp;id2=4d191b1b63c209e37bf27938ef365244d3c41084'>diff</a>)</td></tr></table>
<div class='commit-subject'>PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies</div><div class='commit-msg'>In a struct pcie_link_state, link-&gt;root points to the pcie_link_state of
the root of the PCIe hierarchy.  For the topmost link, this points to
itself (link-&gt;root = link).  For others, we copy the pointer from the
parent (link-&gt;root = link-&gt;parent-&gt;root).

Previously we recognized that Root Ports originated PCIe hierarchies, but
we treated PCI/PCI-X to PCIe Bridges as being in the middle of the
hierarchy, and when we tried to copy the pointer from link-&gt;parent-&gt;root,
there was no parent, and we dereferenced a NULL pointer:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000090
  IP: [&lt;ffffffff9e424350&gt;] pcie_aspm_init_link_state+0x170/0x820

Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just
like Root Ports do, so link-&gt;root for these devices should also point to
itself.

Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181
Tested-by: lists@ssl-mail.com
Tested-by: Jayachandran C. &lt;jnair@caviumnetworks.com&gt;
Signed-off-by: Bjorn Helgaas &lt;bhelgaas@google.com&gt;
CC: stable@vger.kernel.org	# v4.2+</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>Diffstat</a> (limited to 'include/net/netns')</div><table summary='diffstat' class='diffstat'>