#ifndef IPV6_H
#define IPV6_H

#include <asm/byteorder.h>

#include "built_in.h"

/*
 * IPv6 fixed header
 *
 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
 * are glued to priority now, forming "class".
 */
struct ipv6hdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__extension__ uint8_t priority:4,
			      version:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__extension__ uint8_t version:4,
			      priority:4;
#else
# error "Please fix <asm/byteorder.h>"
#endif
	uint8_t flow_lbl[3];
	uint16_t payload_len;
	uint8_t nexthdr;
	uint8_t hop_limit;
	struct in6_addr saddr;
	struct in6_addr daddr;
} __packed;

#endif /* IPV6_H */
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<div class='commit-subject'>mm: memcontrol: fix swap counter leak on swapout from offline cgroup</div><div class='commit-msg'>An offline memory cgroup might have anonymous memory or shmem left
charged to it and no swap.  Since only swap entries pin the id of an
offline cgroup, such a cgroup will have no id and so an attempt to
swapout its anon/shmem will not store memory cgroup info in the swap
cgroup map.  As a result, memcg-&gt;swap or memcg-&gt;memsw will never get
uncharged from it and any of its ascendants.

Fix this by always charging swapout to the first ancestor cgroup that
hasn't released its id yet.

[hannes@cmpxchg.org: add comment to mem_cgroup_swapout]
[vdavydov@virtuozzo.com: use WARN_ON_ONCE() in mem_cgroup_id_get_online()]
  Link: http://lkml.kernel.org/r/20160803123445.GJ13263@esperanza
Fixes: 73f576c04b941 ("mm: memcontrol: fix cgroup creation failure after many small jobs")
Link: http://lkml.kernel.org/r/5336daa5c9a32e776067773d9da655d2dc126491.1470219853.git.vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov &lt;vdavydov@virtuozzo.com&gt;
Acked-by: Johannes Weiner &lt;hannes@cmpxchg.org&gt;
Acked-by: Michal Hocko &lt;mhocko@suse.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;	[3.19+]
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
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