The common clock framework defines a common struct clk useful across
most platforms as well as an implementation of the clk api that drivers
can use safely for managing clocks.
The net result is consolidation of many different struct clk definitions
and platform-specific clock framework implementations.
This patch introduces the common struct clk, struct clk_ops and an
implementation of the well-known clock api in include/clk/clk.h.
Platforms may define their own hardware-specific clock structure and
their own clock operation callbacks, so long as it wraps an instance of
struct clk_hw.
See Documentation/clk.txt for more details.
This patch is based on the work of Jeremy Kerr, which in turn was based
on the work of Ben Herrenschmidt.
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Mike Turquette <mturquette@ti.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Rob Herring <rob.herring <at> calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: Arnd Bergman <arnd.bergmann@linaro.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Richard Zhao <richard.zhao@linaro.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Amit Kucheria <amit.kucheria@linaro.org>
Cc: Deepak Saxena <dsaxena@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes up a duplicate #include, adds an empty implementation of
of_find_compatible_node() and make git ignore .dtb files. And fix
up bus name on OF described PHYs. Nothing exciting here.
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Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull minor devicetree bug fixes and documentation updates from Grant Likely:
"Fixes up a duplicate #include, adds an empty implementation of
of_find_compatible_node() and make git ignore .dtb files. And fix up
bus name on OF described PHYs. Nothing exciting here."
* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6:
doc: dt: Fix broken reference in gpio-leds documentation
of/mdio: fix fixed link bus name
of/fdt.c: asm/setup.h included twice
of: add picochip vendor prefix
dt: add empty of_find_compatible_node function
ARM: devicetree: Add .dtb files to arch/arm/boot/.gitignore
Pull ARM updates from Russell King.
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7358/1: perf: add PMU hotplug notifier
ARM: 7357/1: perf: fix overflow handling for xscale2 PMUs
ARM: 7356/1: perf: check that we have an event in the PMU IRQ handlers
ARM: 7355/1: perf: clear overflow flag when disabling counter on ARMv7 PMU
ARM: 7354/1: perf: limit sample_period to half max_period in non-sampling mode
ARM: ecard: ensure fake vma vm_flags is setup
ARM: 7346/1: errata: fix PL310 erratum #753970 workaround selection
ARM: 7345/1: errata: update workaround for A9 erratum #743622
ARM: 7348/1: arm/spear600: fix one-shot timer
ARM: 7339/1: amba/serial.h: Include types.h for resolving dependency of type bool
Merge the emailed seties of 19 patches from Andrew Morton
* akpm:
rapidio/tsi721: fix queue wrapping bug in inbound doorbell handler
memcg: fix mapcount check in move charge code for anonymous page
mm: thp: fix BUG on mm->nr_ptes
alpha: fix 32/64-bit bug in futex support
memcg: fix GPF when cgroup removal races with last exit
debugobjects: Fix selftest for static warnings
floppy/scsi: fix setting of BIO flags
memcg: fix deadlock by inverting lrucare nesting
drivers/rtc/rtc-r9701.c: fix crash in r9701_remove()
c2port: class_create() returns an ERR_PTR
pps: class_create() returns an ERR_PTR, not NULL
hung_task: fix the broken rcu_lock_break() logic
vfork: kill PF_STARTING
coredump_wait: don't call complete_vfork_done()
vfork: make it killable
vfork: introduce complete_vfork_done()
aio: wake up waiters when freeing unused kiocbs
kprobes: return proper error code from register_kprobe()
kmsg_dump: don't run on non-error paths by default
When moving tasks from old memcg (with move_charge_at_immigrate on new
memcg), followed by removal of old memcg, hit General Protection Fault in
mem_cgroup_lru_del_list() (called from release_pages called from
free_pages_and_swap_cache from tlb_flush_mmu from tlb_finish_mmu from
exit_mmap from mmput from exit_mm from do_exit).
Somewhat reproducible, takes a few hours: the old struct mem_cgroup has
been freed and poisoned by SLAB_DEBUG, but mem_cgroup_lru_del_list() is
still trying to update its stats, and take page off lru before freeing.
A task, or a charge, or a page on lru: each secures a memcg against
removal. In this case, the last task has been moved out of the old memcg,
and it is exiting: anonymous pages are uncharged one by one from the
memcg, as they are zapped from its pagetables, so the charge gets down to
0; but the pages themselves are queued in an mmu_gather for freeing.
Most of those pages will be on lru (and force_empty is careful to
lru_add_drain_all, to add pages from pagevec to lru first), but not
necessarily all: perhaps some have been isolated for page reclaim, perhaps
some isolated for other reasons. So, force_empty may find no task, no
charge and no page on lru, and let the removal proceed.
There would still be no problem if these pages were immediately freed; but
typically (and the put_page_testzero protocol demands it) they have to be
added back to lru before they are found freeable, then removed from lru
and freed. We don't see the issue when adding, because the
mem_cgroup_iter() loops keep their own reference to the memcg being
scanned; but when it comes to mem_cgroup_lru_del_list().
I believe this was not an issue in v3.2: there, PageCgroupAcctLRU and
PageCgroupUsed flags were used (like a trick with mirrors) to deflect view
of pc->mem_cgroup to the stable root_mem_cgroup when neither set.
38c5d72f3e ("memcg: simplify LRU handling by new rule") mercifully
removed those convolutions, but left this General Protection Fault.
But it's surprisingly easy to restore the old behaviour: just check
PageCgroupUsed in mem_cgroup_lru_add_list() (which decides on which lruvec
to add), and reset pc to root_mem_cgroup if page is uncharged. A risky
change? just going back to how it worked before; testing, and an audit of
uses of pc->mem_cgroup, show no problem.
And there's a nice bonus: with mem_cgroup_lru_add_list() itself making
sure that an uncharged page goes to root lru, mem_cgroup_reset_owner() no
longer has any purpose, and we can safely revert 4e5f01c2b9 ("memcg:
clear pc->mem_cgroup if necessary").
Calling update_page_reclaim_stat() after add_page_to_lru_list() in swap.c
is not strictly necessary: the lru_lock there, with RCU before memcg
structures are freed, makes mem_cgroup_get_reclaim_stat_from_page safe
without that; but it seems cleaner to rely on one dependency less.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Previously it was (ab)used by utrace. Then it was wrongly used by the
scheduler code.
Currently it is not used, kill it before it finds the new erroneous user.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Now that CLONE_VFORK is killable, coredump_wait() no longer needs
complete_vfork_done(). zap_threads() should find and kill all tasks with
the same ->mm, this includes our parent if ->vfork_done is set.
mm_release() becomes the only caller, unexport complete_vfork_done().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Make vfork() killable.
Change do_fork(CLONE_VFORK) to do wait_for_completion_killable(). If it
fails we do not return to the user-mode and never touch the memory shared
with our child.
However, in this case we should clear child->vfork_done before return, we
use task_lock() in do_fork()->wait_for_vfork_done() and
complete_vfork_done() to serialize with each other.
Note: now that we use task_lock() we don't really need completion, we
could turn task->vfork_done into "task_struct *wake_up_me" but this needs
some complications.
NOTE: this and the next patches do not affect in-kernel users of
CLONE_VFORK, kernel threads run with all signals ignored including
SIGKILL/SIGSTOP.
However this is obviously the user-visible change. Not only a fatal
signal can kill the vforking parent, a sub-thread can do execve or
exit_group() and kill the thread sleeping in vfork().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
No functional changes.
Move the clear-and-complete-vfork_done code into the new trivial helper,
complete_vfork_done().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since commit 04c6862c05 ("kmsg_dump: add kmsg_dump() calls to the
reboot, halt, poweroff and emergency_restart paths"), kmsg_dump() gets
run on normal paths including poweroff and reboot.
This is less than ideal given pstore implementations that can only
represent single backtraces, since a reboot may overwrite a stored oops
before it's been picked up by userspace. In addition, some pstore
backends may have low performance and provide a significant delay in
reboot as a result.
This patch adds a printk.always_kmsg_dump kernel parameter (which can also
be changed from userspace). Without it, the code will only be run on
failure paths rather than on normal paths. The option can be enabled in
environments where there's a desire to attempt to audit whether or not a
reboot was cleanly requested or not.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Acked-by: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Marco Stornelli <marco.stornelli@gmail.com>
Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Don Zickus <dzickus@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull networking fixes from David Miller:
1) TCP SACK processing can calculate an incorrect reordering value in
some cases, fix from Neal Cardwell.
2) tcp_mark_head_lost() can split SKBs in situations where it should
not, violating send queue invariants expected by other pieces of
code and thus resulting (eventually) in corrupted retransmit state
counters. Also from Neal Cardwell.
3) qla3xxx erroneously calls spin_lock_irqrestore() with constant
hw_flags of zero. Fix from Santosh Nayak.
4) Fix NULL deref in rt2x00, from Gabor Juhos.
5) pch_gbe passes address of wrong typed object to pch_gbe_validate_option
thus corrupting part of the value. From Dan Carpenter.
6) We must check the return value of nlmsg_parse() before trying to use
the results. From Eric Dumazet.
7) Bridging code fails to check return value of ipv6_dev_get_saddr()
thus potentially leaving uninitialized garbage in the outgoing ipv6
header. From Ulrich Weber.
8) Due to rounding and a reversed operation on jiffies, bridge message
ages can go backwards instead of forwards, thus breaking STP. Fixes
from Joakim Tjernlund.
9) r8169 modifies Config* registers without properly holding the
Config9346 lock, resulting in corrupted IP fragments on some chips.
Fix from Francois Romieu.
10) NET_PACKET_ENGINE default wan't set properly during the network
driver mega-move. Fix from Stephen Hemminger.
11) vmxnet3 uses TCP header size where it actually should use the UDP
header size, fix from Shreyas Bhatewara.
12) Netfilter bridge module autoload is busted in the compat case, fix
from Florian Westphal.
13) Wireless Key removal was not setting multicast bits correctly thus
accidently killing the unicast key 0 and thus all traffic stops.
Fix from Johannes Berg.
14) Fix endless retries of A-MPDU transmissions in brcm80211 driver.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (22 commits)
qla3xxx: ethernet: Fix bogus interrupt state flag.
bridge: check return value of ipv6_dev_get_saddr()
rtnetlink: fix rtnl_calcit() and rtnl_dump_ifinfo()
bridge: message age needs to increase, not decrease.
bridge: Adjust min age inc for HZ > 256
tcp: don't fragment SACKed skbs in tcp_mark_head_lost()
r8169: corrupted IP fragments fix for large mtu.
packetengines: fix config default
vmxnet3: Fix transport header size
enic: fix an endian bug in enic_probe()
pch_gbe: memory corruption calling pch_gbe_validate_option()
tg3: Fix tg3_get_stats64 for 5700 / 5701 devs
tcp: fix false reordering signal in tcp_shifted_skb
tcp: fix comment for tp->highest_sack
netfilter: bridge: fix module autoload in compat case
brcm80211: smac: only print block-ack timeout message at trace level
brcm80211: smac: fix endless retry of A-MPDU transmissions
mac80211: Fix a warning on changing to monitor mode from STA
mac80211: zero initialize count field in ieee80211_tx_rate
iwlwifi: fix key removal
...
Pull per-cpu patches from Tejun Heo:
"This pull request contains four patches. One replaces manual clearing
with bitmap_clear(), two fix generic definition of __this_cpu ops so
that they don't choose unnecessarily strict arch version. One makes
_this_cpu definition use raw_local_irq_*() so that it doesn't end up
wrecking irq on/off state tracking when used from inside lockdep.
Of the four patches, the raw_local_irq_*() update is the most
important, so please feel free to cherry pick only that one patch and
ignore the rest if you want to - commit e920d5971d 'percpu: use
raw_local_irq_* in _this_cpu op'."
* 'for-3.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: fix __this_cpu_{sub,inc,dec}_return() definition
percpu: use raw_local_irq_* in _this_cpu op
percpu: fix generic definition of __this_cpu_add_and_return()
percpu: use bitmap_clear
It's only used inside fs/dcache.c, and we're going to play games with it
for the word-at-a-time patches. This time we really don't even want to
export it, because it really is an internal function to fs/dcache.c, and
has been since it was introduced.
Having it in that extremely hot header file (it's included in pretty
much everything, thanks to <linux/fs.h>) is a disaster for testing
different versions, and is utterly pointless.
We really should have some kind of header file diet thing, where we
figure out which parts of header files are really better off private and
only result in more expensive compiles.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch adds missed "__" prefixes, otherwise these functions
works as irq/preemption safe.
Reported-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
It did some odd things for unclear reasons. As this is one of the
functions that gets changed when doing word-at-a-time compares, this is
yet another of the "don't change any semantics, but clean things up so
that subsequent patches don't get obscured by the cleanups".
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
.. and also use it in lookup_one_len() rather than open-coding it.
There aren't any performance-critical users, so inlining it is silly.
But it wouldn't matter if it wasn't for the fact that the word-at-a-time
dentry name patches want to conditionally replace the function, and
uninlining it sets the stage for that.
So again, this is a preparatory patch that doesn't change any semantics,
and only prepares for a much cleaner and testable word-at-a-time dentry
name accessor patch.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These don't change any semantics, but they clean up the code a bit and
mark some arguments appropriately 'const'.
They came up as I was doing the word-at-a-time dcache name accessor
code, and cleaning this up now allows me to send out a smaller relevant
interesting patch for the experimental stuff.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There is only one error code to return for a bad user-space buffer
pointer passed to a system call in the same address space as the
system call is executed, and that is EFAULT. Furthermore, the
low-level access routines, which catch most of the faults, return
EFAULT already.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The regset common infrastructure assumed that regsets would always
have .get and .set methods, but not necessarily .active methods.
Unfortunately people have since written regsets without .set methods.
Rather than putting in stub functions everywhere, handle regsets with
null .get or .set methods explicitly.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There was an off-by-one error in the comments describing the
highest_sack field in struct tcp_sock. The comments previously claimed
that it was the "start sequence of the highest skb with SACKed
bit". This commit fixes the comments to note that it is the "start
sequence of the skb just *after* the highest skb with SACKed bit".
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
1) ICMP sockets leave err uninitialized but we try to return it for the
unsupported MSG_OOB case, reported by Dave Jones.
2) Add new Zaurus device ID entries, from Dave Jones.
3) Pointer calculation in hso driver memset is wrong, from Dan
Carpenter.
4) ks8851_probe() checks unsigned value as negative, fix also from Dan
Carpenter.
5) Fix crashes in atl1c driver due to TX queue handling, from Eric
Dumazet. I anticipate some TX side locking fixes coming in the near
future for this driver as well.
6) The inline directive fix in Bluetooth which was breaking the build
only with very new versions of GCC, from Johan Hedberg.
7) Fix crashes in the ATP CLIP code due to ARP cleanups this merge
window, reported by Meelis Roos and fixed by Eric Dumazet.
8) JME driver doesn't flush RX FIFO correctly, from Guo-Fu Tseng.
9) Some ip6_route_output() callers test the return value for NULL, but
this never happens as the convention is to return a dst entry with
dst->error set. Fixes from RonQing Li.
10) Logitech Harmony 900 should be handled by zaurus driver not
cdc_ether, update white lists and black lists accordingly. From
Scott Talbert.
11) Receiving from certain kinds of devices there won't be a MAC header,
so there is no MAC header to fixup in the IPSEC code, and if we try
to do it we'll crash. Fix from Eric Dumazet.
12) Port type array indexing off-by-one in mlx4 driver, fix from Yevgeny
Petrilin.
13) Fix regression in link-down handling in davinci_emac which causes
all RX descriptors to be freed up and therefore RX to wedge
completely, from Christian Riesch.
14) It took two attempts, but ctnetlink soft lockups seem to be
cured now, from Pablo Neira Ayuso.
15) Endianness bug fix in ENIC driver, from Santosh Nayak.
16) The long ago conversion of the PPP fragmentation code over to
abstracted SKB list handling wasn't perfect, once we get an
out of sequence SKB we don't flush the rest of them like we
should. From Ben McKeegan.
17) Fix regression of ->ip_summed initialization in sfc driver.
From Ben Hutchings.
18) Bluetooth timeout mistakenly using msecs instead of jiffies,
from Andrzej Kaczmarek.
19) Using _sync variant of work cancellation results in deadlocks,
use the non _sync variants instead. From Andre Guedes.
20) Bluetooth rfcomm code had reference counting problems leading
to crashes, fix from Octavian Purdila.
21) The conversion of netem over to classful qdisc handling added
two bugs to netem_dequeue(), fixes from Eric Dumazet.
22) Missing pci_iounmap() in ATM Solos driver. Fix from Julia Lawall.
23) b44_pci_exit() should not have __exit tag since it's invoked from
non-__exit code. From Nikola Pajkovsky.
24) The conversion of the neighbour hash tables over to RCU added a
race, fixed here by adding the necessary reread of tbl->nht, fix
from Michel Machado.
25) When we added VF (virtual function) attributes for network device
dumps, this potentially bloats up the size of the dump of one
network device such that the dump size is too large for the buffer
allocated by properly written netlink applications.
In particular, if you add 255 VFs to a network device, parts of
GLIBC stop working.
To fix this, we add an attribute that is used to turn on these
extended portions of the network device dump. Sophisticaed
applications like 'ip' that want to see this stuff will be changed
to set the attribute, whereas things like GLIBC that don't care
about VFs simply will not, and therefore won't be busted by the
mere presence of VFs on a network device.
Thanks to the tireless work of Greg Rose on this fix.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (53 commits)
sfc: Fix assignment of ip_summed for pre-allocated skbs
ppp: fix 'ppp_mp_reconstruct bad seq' errors
enic: Fix endianness bug.
gre: fix spelling in comments
netfilter: ctnetlink: fix soft lockup when netlink adds new entries (v2)
Revert "netfilter: ctnetlink: fix soft lockup when netlink adds new entries"
davinci_emac: Do not free all rx dma descriptors during init
mlx4_core: Fixing array indexes when setting port types
phy: IC+101G and PHY_HAS_INTERRUPT flag
netdev/phy/icplus: Correct broken phy_init code
ipsec: be careful of non existing mac headers
Move Logitech Harmony 900 from cdc_ether to zaurus
hso: memsetting wrong data in hso_get_count()
netfilter: ip6_route_output() never returns NULL.
ethernet/broadcom: ip6_route_output() never returns NULL.
ipv6: ip6_route_output() never returns NULL.
jme: Fix FIFO flush issue
atm: clip: remove clip_tbl
ipv4: ping: Fix recvmsg MSG_OOB error handling.
rtnetlink: Fix problem with buffer allocation
...
The autofs compat handling fix caused a compile failure when
CONFIG_COMPAT isn't defined.
Instead of adding random #ifdef'fery in autofs, let's just make the
compat helpers earlier to use: without CONFIG_COMPAT, is_compat_task()
just hardcodes to zero.
We could probably do something similar for a number of other cases where
we have #ifdef's in code, but this is the low-hanging fruit.
Reported-and-tested-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch is intentionally incomplete to simplify the review.
It ignores ep_unregister_pollwait() which plays with the same wqh.
See the next change.
epoll assumes that the EPOLL_CTL_ADD'ed file controls everything
f_op->poll() needs. In particular it assumes that the wait queue
can't go away until eventpoll_release(). This is not true in case
of signalfd, the task which does EPOLL_CTL_ADD uses its ->sighand
which is not connected to the file.
This patch adds the special event, POLLFREE, currently only for
epoll. It expects that init_poll_funcptr()'ed hook should do the
necessary cleanup. Perhaps it should be defined as EPOLLFREE in
eventpoll.
__cleanup_sighand() is changed to do wake_up_poll(POLLFREE) if
->signalfd_wqh is not empty, we add the new signalfd_cleanup()
helper.
ep_poll_callback(POLLFREE) simply does list_del_init(task_list).
This make this poll entry inconsistent, but we don't care. If you
share epoll fd which contains our sigfd with another process you
should blame yourself. signalfd is "really special". I simply do
not know how we can define the "right" semantics if it used with
epoll.
The main problem is, epoll calls signalfd_poll() once to establish
the connection with the wait queue, after that signalfd_poll(NULL)
returns the different/inconsistent results depending on who does
EPOLL_CTL_MOD/signalfd_read/etc. IOW: apart from sigmask, signalfd
has nothing to do with the file, it works with the current thread.
In short: this patch is the hack which tries to fix the symptoms.
It also assumes that nobody can take tasklist_lock under epoll
locks, this seems to be true.
Note:
- we do not have wake_up_all_poll() but wake_up_poll()
is fine, poll/epoll doesn't use WQ_FLAG_EXCLUSIVE.
- signalfd_cleanup() uses POLLHUP along with POLLFREE,
we need a couple of simple changes in eventpoll.c to
make sure it can't be "lost".
Reported-by: Maxime Bizon <mbizon@freebox.fr>
Cc: <stable@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
serial.h uses bool, but its definition is missing, as it doesn't include
types.h. Fix this by including types.h
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Niccolo Belli reported ipsec crashes in case we handle a frame without
mac header (atm in his case)
Before copying mac header, better make sure it is present.
Bugzilla reference: https://bugzilla.kernel.org/show_bug.cgi?id=42809
Reported-by: Niccolò Belli <darkbasic@linuxsystems.it>
Tested-by: Niccolò Belli <darkbasic@linuxsystems.it>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A number of new device ids, and a cleanup/fix for some of the option
device ids that shouldn't have been added in the first place.
There's also a few USB 3 fixes for problems that people have reported,
and a usb-storage bugfix to round it out.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
USB bugfixes for 3.3-rc4
A number of new device ids, and a cleanup/fix for some of the option
device ids that shouldn't have been added in the first place.
There's also a few USB 3 fixes for problems that people have reported,
and a usb-storage bugfix to round it out.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'usb-3.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: Added Kamstrup VID/PIDs to cp210x serial driver.
USB: Serial: ti_usb_3410_5052: Add Abbot Diabetes Care cable id
usb-storage: fix freezing of the scanning thread
xhci: Fix encoding for HS bulk/control NAK rate.
USB: Set hub depth after USB3 hub reset
USB: Fix handoff when BIOS disables host PCI device.
USB: option: cleanup zte 3g-dongle's pid in option.c
USB: Don't fail USB3 probe on missing legacy PCI IRQ.
xhci: Fix oops caused by more USB2 ports than USB3 ports.
USB: Remove duplicate USB 3.0 hub feature #defines.
Fix a nasty Oops in the NFSv4 getacl code, another source of infinite loops
in the NFSv4 state recovery code, and a regression in NFSv4.1 session
initialisation.
Also deal with an NFSv4.1 memory leak.
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Merge tag 'nfs-for-3.3-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Bugfixes for the NFS client.
Fix a nasty Oops in the NFSv4 getacl code, another source of infinite
loops in the NFSv4 state recovery code, and a regression in NFSv4.1
session initialisation.
Also deal with an NFSv4.1 memory leak.
* tag 'nfs-for-3.3-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4: fix server_scope memory leak
NFSv4.1: Fix a NFSv4.1 session initialisation regression
NFSv4: Ensure we throw out bad delegation stateids on NFS4ERR_BAD_STATEID
NFSv4: Fix an Oops in the NFSv4 getacl code
The 'poll()' system call timeout parameter is supposed to be 'int', not
'long'.
Now, the reason this matters is that right now 32-bit compat mode is
broken on at least x86-64, because the 32-bit code just calls
'sys_poll()' directly on x86-64, and the 32-bit argument will have been
zero-extended, turning a signed 'int' into a large unsigned 'long'
value.
We could just introduce a 'compat_sys_poll()' function for this, and
that may eventually be what we have to do, but since the actual standard
poll() semantics is *supposed* to be 'int', and since at least on x86-64
glibc sign-extends the argument before invocing the system call (so
nobody can actually use a 64-bit timeout value in user space _anyway_,
even in 64-bit binaries), the simpler solution would seem to be to just
fix the definition of the system call to match what it should have been
from the very start.
If it turns out that somebody somehow circumvents the user-level libc
64-bit sign extension and actually uses a large unsigned 64-bit timeout
despite that not being how poll() is supposed to work, we will need to
do the compat_sys_poll() approach.
Reported-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Implement a new netlink attribute type IFLA_EXT_MASK. The mask
is a 32 bit value that can be used to indicate to the kernel that
certain extended ifinfo values are requested by the user application.
At this time the only mask value defined is RTEXT_FILTER_VF to
indicate that the user wants the ifinfo dump to send information
about the VFs belonging to the interface.
This patch fixes a bug in which certain applications do not have
large enough buffers to accommodate the extra information returned
by the kernel with large numbers of SR-IOV virtual functions.
Those applications will not send the new netlink attribute with
the interface info dump request netlink messages so they will
not get unexpectedly large request buffers returned by the kernel.
Modifies the rtnl_calcit function to traverse the list of net
devices and compute the minimum buffer size that can hold the
info dumps of all matching devices based upon the filter passed
in via the new netlink attribute filter mask. If no filter
mask is sent then the buffer allocation defaults to NLMSG_GOODSIZE.
With this change it is possible to add yet to be defined netlink
attributes to the dump request which should make it fairly extensible
in the future.
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It doesn't make sense to trace irq off or do irq flags
lock proving inside 'this_cpu' operations, so replace local_irq_*
with raw_local_irq_* in 'this_cpu' op.
Also the patch fixes onelockdep warning[1] by the replacement, see
below:
In commit: 933393f58fef9963eac61db8093689544e29a600(percpu:
Remove irqsafe_cpu_xxx variants), local_irq_save/restore(flags) are
added inside this_cpu_inc operation, so that trace_hardirqs_off_caller
will be called by trace_hardirqs_on_caller directly because
__debug_atomic_inc is implemented as this_cpu_inc, which may trigger
the lockdep warning[1], for example in the below ARM scenary:
kernel_thread_helper /*irq disabled*/
->trace_hardirqs_on_caller /*hardirqs_enabled was set*/
->trace_hardirqs_off_caller /*hardirqs_enabled cleared*/
__this_cpu_add(redundant_hardirqs_on)
->trace_hardirqs_off_caller /*irq disabled, so call here*/
The 'unannotated irqs-on' warning will be triggered somewhere because
irq is just enabled after the irq trace in kernel_thread_helper.
[1],
[ 0.162841] ------------[ cut here ]------------
[ 0.167694] WARNING: at kernel/lockdep.c:3493 check_flags+0xc0/0x1d0()
[ 0.174468] Modules linked in:
[ 0.177703] Backtrace:
[ 0.180328] [<c00171f0>] (dump_backtrace+0x0/0x110) from [<c0412320>] (dump_stack+0x18/0x1c)
[ 0.189086] r6:c051f778 r5:00000da5 r4:00000000 r3:60000093
[ 0.195007] [<c0412308>] (dump_stack+0x0/0x1c) from [<c00410e8>] (warn_slowpath_common+0x54/0x6c)
[ 0.204223] [<c0041094>] (warn_slowpath_common+0x0/0x6c) from [<c0041124>] (warn_slowpath_null+0x24/0x2c)
[ 0.214111] r8:00000000 r7:00000000 r6:ee069598 r5:60000013 r4:ee082000
[ 0.220825] r3:00000009
[ 0.223693] [<c0041100>] (warn_slowpath_null+0x0/0x2c) from [<c0088f38>] (check_flags+0xc0/0x1d0)
[ 0.232910] [<c0088e78>] (check_flags+0x0/0x1d0) from [<c008d348>] (lock_acquire+0x4c/0x11c)
[ 0.241668] [<c008d2fc>] (lock_acquire+0x0/0x11c) from [<c0415aa4>] (_raw_spin_lock+0x3c/0x74)
[ 0.250610] [<c0415a68>] (_raw_spin_lock+0x0/0x74) from [<c010a844>] (set_task_comm+0x20/0xc0)
[ 0.259521] r6:ee069588 r5:ee0691c0 r4:ee082000
[ 0.264404] [<c010a824>] (set_task_comm+0x0/0xc0) from [<c0060780>] (kthreadd+0x28/0x108)
[ 0.272857] r8:00000000 r7:00000013 r6:c0044a08 r5:ee0691c0 r4:ee082000
[ 0.279571] r3:ee083fe0
[ 0.282470] [<c0060758>] (kthreadd+0x0/0x108) from [<c0044a08>] (do_exit+0x0/0x6dc)
[ 0.290405] r5:c0060758 r4:00000000
[ 0.294189] ---[ end trace 1b75b31a2719ed1c ]---
[ 0.299041] possible reason: unannotated irqs-on.
[ 0.303955] irq event stamp: 5
[ 0.307159] hardirqs last enabled at (4): [<c001331c>] no_work_pending+0x8/0x2c
[ 0.314880] hardirqs last disabled at (5): [<c0089b08>] trace_hardirqs_on_caller+0x60/0x26c
[ 0.323547] softirqs last enabled at (0): [<c003f754>] copy_process+0x33c/0xef4
[ 0.331207] softirqs last disabled at (0): [< (null)>] (null)
[ 0.337585] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This patch adds missed "__" into function prefix.
Otherwise on all archectures (except x86) it expands to irq/preemtion-safe
variant: _this_cpu_generic_add_return(), which do extra irq-save/irq-restore.
Optimal generic implementation is __this_cpu_generic_add_return().
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
ebt_among extension of ebtables uses __alignof__(_xt_align) while the
corresponding kernel module uses __alignof__(ebt_replace) to determine
the alignment in EBT_ALIGN().
These are the results of these values on different platforms:
x86 x86_64 ppc
__alignof__(_xt_align) 4 8 8
__alignof__(ebt_replace) 4 8 4
ebtables fails to add rules which use the among extension.
I'm using kernel 2.6.33 and ebtables 2.0.10-4
According to Bart De Schuymer, userspace alignment was changed to
_xt_align to fix an alignment issue on a userspace32-kernel64 system
(he thinks it was for an ARM device). So userspace must be right.
The kernel alignment macro needs to change so it also uses _xt_align
instead of ebt_replace. The userspace changes date back from
June 29, 2009.
Signed-off-by: Joerg Willmann <joe@clnt.de>
Signed-off by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Assorted fixes, sat in -next for a week or so...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
ocfs2: deal with wraparounds of i_nlink in ocfs2_rename()
vfs: fix compat_sys_stat() handling of overflows in st_nlink
quota: Fix deadlock with suspend and quotas
vfs: Provide function to get superblock and wait for it to thaw
vfs: fix panic in __d_lookup() with high dentry hashtable counts
autofs4 - fix lockdep splat in autofs
vfs: fix d_inode_lookup() dentry ref leak
time_t was used in the signature and key packet headers,
which is typedef of long and is different on 32 and 64 bit architectures.
Signature and key format should be independent of architecture.
Similar to GPG, I have changed the type to uint32_t.
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: James Morris <jmorris@namei.org>
Use standard ror64() instead of hand-written.
There is no standard ror64, so create it.
The difference is shift value being "unsigned int" instead of uint64_t
(for which there is no reason). gcc starts to emit native ROR instructions
which it doesn't do for some reason currently. This should make the code
faster.
Patch survives in-tree crypto test and ping flood with hmac(sha512) on.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add empty of_find_compatible_node function for !CONFIG_OF build.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
In quota code we need to find a superblock corresponding to a device and wait
for superblock to be unfrozen. However this waiting has to happen without
s_umount semaphore because that is required for superblock to thaw. So provide
a function in VFS for this to keep dances with s_umount where they belong.
[AV: implementation switched to saner variant]
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Modified the mmc_poweroff to resume before sending the poweroff
notification command. In sleep mode only AWAKE and RESET commands are
allowed, so before sending the poweroff notification command resume from
sleep mode and then send the notification command.
PowerOff Notify is tested on a Synopsis Designware Host Controller
(eMMC 4.5). The suspend to RAM and resume works fine.
Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Tested-by: Girish K S <girish.shivananjappa@linaro.org>
Reviewed-by: Saugata Das <saugata.das@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
There is an understood mismatch between the voltage the host controller is
set to and the voltage supplied to the card by a fixed voltage regulator.
Teaching the driver to accept the mismatch is overly complicated. Instead
just accept the regulator's voltage.
This patch adds MMC_CAP2_BROKEN_VOLTAGE.
If the voltage didn't satisfy between min_uV and max_uV, try to change
the voltage in core.c. When changing the voltage, maybe use
regulator_set_voltage().
In regulator_set_voltage(), check the below condition.
/* sanity check */
if (!rdev->desc->ops->set_voltage &&
!rdev->desc->ops->set_voltage_sel) {
ret = -EINVAL;
goto out;
}
If some board should use the fixed-regulator, always return -EINVAL.
Then, eMMC didn't initialize always.
So if use a fixed-regulator, we need to add the MMC_CAP2_BROKEN_VOLTAGE.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Ensure clocks are always enabled before any interaction with the
host controller driver. This makes sure that there is no race
between host execution and the core layer turning off clocks
in different context with clock gating framework.
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Per Forlin <per.forlin@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Says Jens:
"Time to push off some of the pending items. I really wanted to wait
until we had the regression nailed, but alas it's not quite there yet.
But I'm very confident that it's "just" a missing expire on exit, so
fix from Tejun should be fairly trivial. I'm headed out for a week on
the slopes.
- Killing the barrier part of mtip32xx. It doesn't really support
barriers, and it doesn't need them (writes are fully ordered).
- A few fixes from Dan Carpenter, preventing overflows of integer
multiplication.
- A fixup for loop, fixing a previous commit that didn't quite solve
the partial read problem from Dave Young.
- A bio integer overflow fix from Kent Overstreet.
- Improvement/fix of the door "keep locked" part of the cdrom shared
code from Paolo Benzini.
- A few cfq fixes from Shaohua Li.
- A fix for bsg sysfs warning when removing a file it did not create
from Stanislaw Gruszka.
- Two fixes for floppy from Vivek, preventing a crash.
- A few block core fixes from Tejun. One killing the over-optimized
ioc exit path, cleaning that up nicely. Two others fixing an oops
on elevator switch, due to calling into the scheduler merge check
code without holding the queue lock."
* 'for-linus' of git://git.kernel.dk/linux-block:
block: fix lockdep warning on io_context release put_io_context()
relay: prevent integer overflow in relay_open()
loop: zero fill bio instead of return -EIO for partial read
bio: don't overflow in bio_get_nr_vecs()
floppy: Fix a crash during rmmod
floppy: Cleanup disk->queue before caling put_disk() if add_disk() was never called
cdrom: move shared static to cdrom_device_info
bsg: fix sysfs link remove warning
block: don't call elevator callbacks for plug merges
block: separate out blk_rq_merge_ok() and blk_try_merge() from elevator functions
mtip32xx: removed the irrelevant argument of mtip_hw_submit_io() and the unused member of struct driver_data
block: strip out locking optimization in put_io_context()
cdrom: use copy_to_user() without the underscores
block: fix ioc locking warning
block: fix NULL icq_cache reference
block,cfq: change code order
Somehow we ended up with duplicate hub feature #defines in ch11.h.
Tatyana Brokhman first created the USB 3.0 hub feature macros in 2.6.38
with commit 0eadcc0920 "usb: USB3.0 ch11
definitions". In 2.6.39, I modified a patch from John Youn that added
similar macros in a different place in the same file, and committed
dbe79bbe9d "USB 3.0 Hub Changes".
Some of the #defines used different names for the same values. Others
used exactly the same names with the same values, like these gems:
#define USB_PORT_FEAT_BH_PORT_RESET 28
...
#define USB_PORT_FEAT_BH_PORT_RESET 28
According to my very geeky husband (who looked it up in the C99 spec),
it is allowed to have object-like macros with duplicate names as long as
the replacement list is exactly the same. However, he recalled that
some compilers will give warnings when they find duplicate macros. It's
probably best to remove the duplicates in the stable tree, so that the
code compiles for everyone.
The macros are now fixed to move the feature requests that are specific
to USB 3.0 hubs into a new section (out of the USB 2.0 hub feature
section), and use the most common macro name.
This patch should be backported to 2.6.39.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Tatyana Brokhman <tlinder@codeaurora.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Jamey Sharp <jamey@minilop.net>
Cc: stable@vger.kernel.org
Quoth David:
1) GRO MAC header comparisons were ethernet specific, breaking other
link types. This required a multi-faceted fix to cure the originally
noted case (Infiniband), because IPoIB was lying about it's actual
hard header length. Thanks to Eric Dumazet, Roland Dreier, and
others.
2) Fix build failure when INET_UDP_DIAG is built in and ipv6 is modular.
From Anisse Astier.
3) Off by ones and other bug fixes in netprio_cgroup from Neil Horman.
4) ipv4 TCP reset generation needs to respect any network interface
binding from the socket, otherwise route lookups might give a
different result than all the other segments received. From Shawn
Lu.
5) Fix unintended regression in ipv4 proxy ARP responses, from Thomas
Graf.
6) Fix SKB under-allocation bug in sh_eth, from Yoshihiro Shimoda.
7) Revert skge PCI mapping changes that are causing crashes for some
folks, from Stephen Hemminger.
8) IPV4 route lookups fill in the wildcarded fields of the given flow
lookup key passed in, which is fine most of the time as this is
exactly what the caller's want. However there are a few cases that
want to retain the original flow key values afterwards, so handle
those cases properly. Fix from Julian Anastasov.
9) IGB/IXGBE VF lookup bug fixes from Greg Rose.
10) Properly null terminate filename passed to ethtool flash device
method, from Ben Hutchings.
11) S3 resume fix in via-velocity from David Lv.
12) Fix double SKB free during xmit failure in CAIF, from Dmitry
Tarnyagin.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (72 commits)
net: Don't proxy arp respond if iif == rt->dst.dev if private VLAN is disabled
ipv4: Fix wrong order of ip_rt_get_source() and update iph->daddr.
netprio_cgroup: fix wrong memory access when NETPRIO_CGROUP=m
netprio_cgroup: don't allocate prio table when a device is registered
netprio_cgroup: fix an off-by-one bug
bna: fix error handling of bnad_get_flash_partition_by_offset()
isdn: type bug in isdn_net_header()
net: Make qdisc_skb_cb upper size bound explicit.
ixgbe: ethtool: stats user buffer overrun
ixgbe: dcb: up2tc mapping lost on disable/enable CEE DCB state
ixgbe: do not update real num queues when netdev is going away
ixgbe: Fix broken dependency on MAX_SKB_FRAGS being related to page size
ixgbe: Fix case of Tx Hang in PF with 32 VFs
ixgbe: fix vf lookup
igb: fix vf lookup
e1000: add dropped DMA receive enable back in for WoL
gro: more generic L2 header check
IPoIB: Stop lying about hard_header_len and use skb->cb to stash LL addresses
zd1211rw: firmware needs duration_id set to zero for non-pspoll frames
net: enable TC35815 for MIPS again
...
Here are a few minor USB fixes and a bunch of device id updates for the
USB drivers.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
USB fixes for 3.3-rc3
Here are a few minor USB fixes and a bunch of device id updates for the
USB drivers.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'usb-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: usbserial: add new PID number (0xa951) to the ftdi driver
usb: ch9.h: usb_endpoint_maxp() uses __le16_to_cpu()
usb: musb: fix a build error on mips
uwb & wusb & usb wireless controllers: fix kconfig error & build errors
usb: Skip PCI USB quirk handling for Netlogic XLP
powerpc/usb: fix issue of CPU halt when missing USB PHY clock
usb: otg: mv_otg: Add dependence
usb: host: Distinguish Kconfig text for Freescale controllers
USB: add new zte 3g-dongle's pid to option.c
usb: ch9.h: usb_endpoint_maxp() uses __le16_to_cpu()
USB: qcserial: don't enable autosuspend
USB: qcserial: add several new serial devices
usb: otg: mv_otg: Add dependence
usb: gadget: zero: fix bug in loopback autoresume handling
The keeplocked variable in the cdrom driver is shared across multiple
drives, but set in per-device ioctls. Move it to the per-device struct,
avoiding that the setting on one drive affects the driver's behavior
when closing another.
[ Impact: limit udev's confusion to one drive when a CD burning program
unlocks the CD door at the end of burning. ]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Mike Turquette