#undef TRACE_SYSTEM
#define TRACE_SYSTEM kmem

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

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

DECLARE_EVENT_CLASS(kmem_alloc,

	TP_PROTO(unsigned long call_site,
		 const void *ptr,
		 size_t bytes_req,
		 size_t bytes_alloc,
		 gfp_t gfp_flags),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),

	TP_STRUCT__entry(
		__field(	unsigned long,	call_site	)
		__field(	const void *,	ptr		)
		__field(	size_t,		bytes_req	)
		__field(	size_t,		bytes_alloc	)
		__field(	gfp_t,		gfp_flags	)
	),

	TP_fast_assign(
		__entry->call_site	= call_site;
		__entry->ptr		= ptr;
		__entry->bytes_req	= bytes_req;
		__entry->bytes_alloc	= bytes_alloc;
		__entry->gfp_flags	= gfp_flags;
	),

	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
		__entry->call_site,
		__entry->ptr,
		__entry->bytes_req,
		__entry->bytes_alloc,
		show_gfp_flags(__entry->gfp_flags))
);

DEFINE_EVENT(kmem_alloc, kmalloc,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags)
);

DEFINE_EVENT(kmem_alloc, kmem_cache_alloc,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags)
);

DECLARE_EVENT_CLASS(kmem_alloc_node,

	TP_PROTO(unsigned long call_site,
		 const void *ptr,
		 size_t bytes_req,
		 size_t bytes_alloc,
		 gfp_t gfp_flags,
		 int node),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),

	TP_STRUCT__entry(
		__field(	unsigned long,	call_site	)
		__field(	const void *,	ptr		)
		__field(	size_t,		bytes_req	)
		__field(	size_t,		bytes_alloc	)
		__field(	gfp_t,		gfp_flags	)
		__field(	int,		node		)
	),

	TP_fast_assign(
		__entry->call_site	= call_site;
		__entry->ptr		= ptr;
		__entry->bytes_req	= bytes_req;
		__entry->bytes_alloc	= bytes_alloc;
		__entry->gfp_flags	= gfp_flags;
		__entry->node		= node;
	),

	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
		__entry->call_site,
		__entry->ptr,
		__entry->bytes_req,
		__entry->bytes_alloc,
		show_gfp_flags(__entry->gfp_flags),
		__entry->node)
);

DEFINE_EVENT(kmem_alloc_node, kmalloc_node,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc,
		 gfp_t gfp_flags, int node),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node)
);

DEFINE_EVENT(kmem_alloc_node, kmem_cache_alloc_node,

	TP_PROTO(unsigned long call_site, const void *ptr,
		 size_t bytes_req, size_t bytes_alloc,
		 gfp_t gfp_flags, int node),

	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node)
);

DECLARE_EVENT_CLASS(kmem_free,

	TP_PROTO(unsigned long call_site, const void *ptr),

	TP_ARGS(call_site, ptr),

	TP_STRUCT__entry(
		__field(	unsigned long,	call_site	)
		__field(	const void *,	ptr		)
	),

	TP_fast_assign(
		__entry->call_site	= call_site;
		__entry->ptr		= ptr;
	),

	TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
);

DEFINE_EVENT(kmem_free, kfree,

	TP_PROTO(unsigned long call_site, const void *ptr),

	TP_ARGS(call_site, ptr)
);

DEFINE_EVENT(kmem_free, kmem_cache_free,

	TP_PROTO(unsigned long call_site, const void *ptr),

	TP_ARGS(call_site, ptr)
);

TRACE_EVENT(mm_page_free,

	TP_PROTO(struct page *page, unsigned int order),

	TP_ARGS(page, order),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
	),

	TP_fast_assign(
		__entry->pfn		= page_to_pfn(page);
		__entry->order		= order;
	),

	TP_printk("page=%p pfn=%lu order=%d",
			pfn_to_page(__entry->pfn),
			__entry->pfn,
			__entry->order)
);

TRACE_EVENT(mm_page_free_batched,

	TP_PROTO(struct page *page, int cold),

	TP_ARGS(page, cold),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	int,		cold		)
	),

	TP_fast_assign(
		__entry->pfn		= page_to_pfn(page);
		__entry->cold		= cold;
	),

	TP_printk("page=%p pfn=%lu order=0 cold=%d",
			pfn_to_page(__entry->pfn),
			__entry->pfn,
			__entry->cold)
);

TRACE_EVENT(mm_page_alloc,

	TP_PROTO(struct page *page, unsigned int order,
			gfp_t gfp_flags, int migratetype),

	TP_ARGS(page, order, gfp_flags, migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
		__field(	gfp_t,		gfp_flags	)
		__field(	int,		migratetype	)
	),

	TP_fast_assign(
		__entry->pfn		= page ? page_to_pfn(page) : -1UL;
		__entry->order		= order;
		__entry->gfp_flags	= gfp_flags;
		__entry->migratetype	= migratetype;
	),

	TP_printk("page=%p pfn=%lu order=%d migratetype=%d gfp_flags=%s",
		__entry->pfn != -1UL ? pfn_to_page(__entry->pfn) : NULL,
		__entry->pfn != -1UL ? __entry->pfn : 0,
		__entry->order,
		__entry->migratetype,
		show_gfp_flags(__entry->gfp_flags))
);

DECLARE_EVENT_CLASS(mm_page,

	TP_PROTO(struct page *page, unsigned int order, int migratetype),

	TP_ARGS(page, order, migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
		__field(	int,		migratetype	)
	),

	TP_fast_assign(
		__entry->pfn		= page ? page_to_pfn(page) : -1UL;
		__entry->order		= order;
		__entry->migratetype	= migratetype;
	),

	TP_printk("page=%p pfn=%lu order=%u migratetype=%d percpu_refill=%d",
		__entry->pfn != -1UL ? pfn_to_page(__entry->pfn) : NULL,
		__entry->pfn != -1UL ? __entry->pfn : 0,
		__entry->order,
		__entry->migratetype,
		__entry->order == 0)
);

DEFINE_EVENT(mm_page, mm_page_alloc_zone_locked,

	TP_PROTO(struct page *page, unsigned int order, int migratetype),

	TP_ARGS(page, order, migratetype)
);

TRACE_EVENT(mm_page_pcpu_drain,

	TP_PROTO(struct page *page, unsigned int order, int migratetype),

	TP_ARGS(page, order, migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn		)
		__field(	unsigned int,	order		)
		__field(	int,		migratetype	)
	),

	TP_fast_assign(
		__entry->pfn		= page ? page_to_pfn(page) : -1UL;
		__entry->order		= order;
		__entry->migratetype	= migratetype;
	),

	TP_printk("page=%p pfn=%lu order=%d migratetype=%d",
		pfn_to_page(__entry->pfn), __entry->pfn,
		__entry->order, __entry->migratetype)
);

TRACE_EVENT(mm_page_alloc_extfrag,

	TP_PROTO(struct page *page,
		int alloc_order, int fallback_order,
		int alloc_migratetype, int fallback_migratetype),

	TP_ARGS(page,
		alloc_order, fallback_order,
		alloc_migratetype, fallback_migratetype),

	TP_STRUCT__entry(
		__field(	unsigned long,	pfn			)
		__field(	int,		alloc_order		)
		__field(	int,		fallback_order		)
		__field(	int,		alloc_migratetype	)
		__field(	int,		fallback_migratetype	)
		__field(	int,		change_ownership	)
	),

	TP_fast_assign(
		__entry->pfn			= page_to_pfn(page);
		__entry->alloc_order		= alloc_order;
		__entry->fallback_order		= fallback_order;
		__entry->alloc_migratetype	= alloc_migratetype;
		__entry->fallback_migratetype	= fallback_migratetype;
		__entry->change_ownership	= (alloc_migratetype ==
					get_pageblock_migratetype(page));
	),

	TP_printk("page=%p pfn=%lu alloc_order=%d fallback_order=%d pageblock_order=%d alloc_migratetype=%d fallback_migratetype=%d fragmenting=%d change_ownership=%d",
		pfn_to_page(__entry->pfn),
		__entry->pfn,
		__entry->alloc_order,
		__entry->fallback_order,
		pageblock_order,
		__entry->alloc_migratetype,
		__entry->fallback_migratetype,
		__entry->fallback_order < pageblock_order,
		__entry->change_ownership)
);

#endif /* _TRACE_KMEM_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
unresponsive.

Other callers of i915_gem_object_to_ggtt() seem to also check for the
returned pointer being NULL and warn about it, so this clearly has
happened before in other places.

[ Reported it originally to the i915 developers on Jan 8, applying the
  ugly workaround on my own now after triggering the problem for the
  second time with no feedback.

  This is likely to be the same bug reported as

     https://bugs.freedesktop.org/show_bug.cgi?id=98829
     https://bugs.freedesktop.org/show_bug.cgi?id=99134

  which has a patch for the underlying problem, but it hasn't gotten to
  me, so I'm applying the workaround. ]

Cc: Daniel Vetter &lt;daniel.vetter@intel.com&gt;
Cc: Jani Nikula &lt;jani.nikula@linux.intel.com&gt;
Cc: Ville Syrjälä &lt;ville.syrjala@linux.intel.com&gt;
Cc: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Maarten Lankhorst &lt;maarten.lankhorst@linux.intel.com&gt;
Cc: Tvrtko Ursulin &lt;tvrtko.ursulin@intel.com&gt;
Cc: Imre Deak &lt;imre.deak@intel.com&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>Diffstat</a> (limited to 'tools/usb')</div><table summary='diffstat' class='diffstat'>