Commit Graph

349023 Commits

Author SHA1 Message Date
Marcin Slusarz
dd5700ea98 drm/nouveau: fix nouveau_client allocation failure path
Depending on the point of failure, freed object would be returned
or memory leak would happen.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-01-13 18:07:44 +10:00
Marcin Slusarz
82c805abb2 drm/nouveau: don't return freed object from nouveau_handle_create
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-01-13 18:07:41 +10:00
Marcin Slusarz
cfd376b6bf drm/nouveau/vm: fix memory corruption when pgt allocation fails
If we return freed vm, nouveau_drm_open will happily call nouveau_cli_destroy,
which will try to free it again.

Reported-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-01-13 18:07:40 +10:00
Marcin Slusarz
4c4101d29f drm/nouveau: add locking around instobj list operations
Fixes memory corruptions, oopses, etc. when multiple gpuobjs are
simultaneously created or destroyed.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
2013-01-13 18:07:40 +10:00
Ben Skeggs
1a1841d300 drm/nouveau: do not forcibly power on lvds panels
This fix was put in place to fix a bug where the eDP panel on certain
laptops fails to respond over the aux channel after suspend.

It appears that on some systems (Dell M6600, with LVDS panel) there's a
very bad interaction with the eDP init table that causes the SOR to get
very confused and not drive the panel correctly, leading to bleed.

A DPMS off/on cycle is enough to bring it back, but, this will avoid the
problem by not touching the panel GPIOs at times we're not meant to.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-01-13 18:07:32 +10:00
Ben Skeggs
4459146deb drm/nouveau/devinit: ensure legacy vga control is enabled during post
Fixes ACPI backlight control after suspend on some systems.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-01-13 17:59:29 +10:00
Sathya Perla
d0b9cec3e2 be2net: fix unconditionally returning IRQ_HANDLED in INTx
commit e49cc34f introduced an unconditional IRQ_HANDLED return in be_intx()
to workaround Lancer and BE2 HW issues. This is bad as it prevents the kernel
from detecting interrupt storms due to broken HW.

The BE2/Lancer HW issues are:
1) In Lancer, there is no means for the driver to detect if the interrupt
belonged to device, other than counting and notifying events.
2) In Lancer de-asserting INTx takes a while, causing the INTx irq handler
to be called multiple times till the de-assert happens.
3) In BE2, we see an occasional interrupt even when EQs are unarmed.

Issue (1) can cause the notified events to be orphaned, if NAPI was already
running.
This patch fixes this issue by scheduling NAPI only if it is not scheduled
already. Doing this also takes care of possible events_get() race that may be
caused due to issue (2) and (3). Also, IRQ_HANDLED is returned only the first
time zero events are detected.
(Thanks Ben H. for the feedback and suggestions.)

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-12 15:33:01 -08:00
Sam Ravnborg
b7c13f76fd sparc: remove __devinit, __devexit annotations
__devinit, __devexit annotations are nops - so drop them.
Likewise for __devexit_p.

Adjusted alignment of arguments when needed.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-12 15:28:45 -08:00
Pablo Neira Ayuso
1e47ee8367 netfilter: nf_conntrack: fix BUG_ON while removing nf_conntrack with netns
canqun zhang reported that we're hitting BUG_ON in the
nf_conntrack_destroy path when calling kfree_skb while
rmmod'ing the nf_conntrack module.

Currently, the nf_ct_destroy hook is being set to NULL in the
destroy path of conntrack.init_net. However, this is a problem
since init_net may be destroyed before any other existing netns
(we cannot assume any specific ordering while releasing existing
netns according to what I read in recent emails).

Thanks to Gao feng for initial patch to address this issue.

Reported-by: canqun zhang <canqunzhang@gmail.com>
Acked-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-01-12 14:12:36 +01:00
Marek Lindner
0c430d0d7b batman-adv: unbloat batadv_priv if debug is not enabled
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-01-12 20:58:23 +10:00
Marek Lindner
9338026107 batman-adv: remove unused variable from orig_node struct
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-01-12 20:58:23 +10:00
Antonio Quartulli
c0275e243c batman-adv: fix typo in debug message
in bat_iv_ogm.c a debug message should print "tq" instead of "td"

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:23 +10:00
Antonio Quartulli
467b5fe697 batman-adv: use the const qualifier in hash functions
The data argument in each hash function should carry the
"const" qualifier as it is never modified.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:22 +10:00
Antonio Quartulli
fa706554d6 batman-adv: don't compile the BLA switch if not requested
When the Bridge Loop Avoidance component is not compiled-in, its boolean switch
should be not compiled as well. This patch surrounds the switch with a proper
ifdef.

This behaviour was introduced by 9fd6b0615b5499b270d39a92b8790e206cf75833
("batman-adv: add bridge loop avoidance compile option")

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Acked-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:22 +10:00
Antonio Quartulli
3f87c4239f batman-adv: remove useless NULL check
debugfs_remove_recursive() checks whether its argument is not null
on its own, therefore it is possible to remove the external check.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:22 +10:00
Antonio Quartulli
46d160ef88 batman-adv: remove useless blank lines before and after brackets
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:21 +10:00
Antonio Quartulli
dec05074b1 batman-adv: Initialize lockdep class keys for hashes
Different hashes have the same class key because they get
initialised with the same one. For this reason lockdep can create
false warning when they are used recursively.

Re-initialise the key for each hash after the invocation to hash_new()
to avoid this problem.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Tested-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:21 +10:00
Antonio Quartulli
8425ec6aea batman-adv: remove useless assignment in tt_local_add()
The flag field of the tt_local_entry->common structure in
tt_local_add() is first assigned NO_FLAGS and then TT_CLIENT_NEW so
nullifying the first operation. For this reason it is safe to remove
the first assignment.

This was introuduced by ("batman-adv: keep local table consistency for
further TT_RESPONSE")

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:20 +10:00
Antonio Quartulli
39a3299158 batman-adv: unify and properly print hex values
Values are printed in hexadecimal format in several points in the
code, but they are not printed using the same format string.

This patches unifies the format used for such numbers so that they
look the same everywhere.

Given the fact that all the variables printed as hexadecimal are 16
bit long, this is the chosen printing format: %#.4x

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:20 +10:00
Antonio Quartulli
f9d8a53784 batman-adv: print the CRC together with the translation tables
To simplify debugging operations, it is better to print the related
CRC together with the translation table (local CRC for the local
table and global CRC for each entry in the global table)

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:20 +10:00
Antonio Quartulli
85766a8200 batman-adv: improve local translation table output
This patch adds a nice header to the local translation table and
the last_seen time for each local entry

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:20 +10:00
Antonio Quartulli
7cf4d520fd batman-adv: reduce local TT entry timeout to 10 minutes
The current timeout is set to one hour. However a client connected to the mesh
network will always generate traffic. In the worst case it will send ARP
requests every 4 or 5 minutes. On the other hand having a long timeout means
storing dead entries for one hour and it leads to very big trans-tables
containing useless clients.

This patch reduces the timeout to 10 minutes

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-01-12 20:58:19 +10:00
Linus Lüssing
02233e0c75 batman-adv: Do not add multicast MAC addresses to translation table
The current translation table mechanism is not suitable for multicast
addresses and we are currently flooding such frames anyway.

Therefore this patch prevents multicast MAC addresses being added to the
translation table.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Acked-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-01-12 20:58:19 +10:00
Shan Wei
569174433d batman-adv: use per_cpu_add helper
this_cpu_add is an atomic operation.
and be more faster than per_cpu_ptr operation.

Signed-off-by: Shan Wei <davidshan@tencent.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-01-12 20:58:19 +10:00
Jason Wang
dd38bd8530 tuntap: fix leaking reference count
Reference count leaking of both module and sock were found:

- When a detached file were closed, its sock refcnt from device were not
  released, solving this by add the sock_put().
- The module were hold or drop unconditionally in TUNSETPERSIST, which means we
  if we set the persist flag for N times, we need unset it for another N
  times. Solving this by only hold or drop an reference when there's a flag
  change and also drop the reference count when the persist device is deleted.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 19:42:02 -08:00
Jason Wang
7c0c3b1a8a tuntap: forbid calling TUNSETIFF when detached
Michael points out that even after Stefan's fix the TUNSETIFF is still allowed
to create a new tap device. This because we only check tfile->tun but the
tfile->detached were introduced. Fix this by failing early in tun_set_iff() if
the file is detached. After this fix, there's no need to do the check again in
tun_set_iff(), so this patch removes it.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 19:42:02 -08:00
Jason Wang
b8deabd3ee tuntap: switch to use rtnl_dereference()
Switch to use rtnl_dereference() instead of the open code, suggested by Eric.

Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 19:42:02 -08:00
Paul Gortmaker
00494be454 networking/cs89x0.txt: delete stale information about hand patching
Output of a git grep happened to make me look into this file, and
I found instructions about how to hand patch (without using patch)
the driver into the kernel tree.

Since the driver has been a part of the mainline kernel for years,
we can dump this whole section.  Fortunately it doesn't even cause
a renumbering of the sections to do so.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 16:52:26 -08:00
Eric Dumazet
18aafc622a net: splice: fix __splice_segment()
commit 9ca1b22d6d (net: splice: avoid high order page splitting)
forgot that skb->head could need a copy into several page frags.

This could be the case for loopback traffic mostly.

Also remove now useless skb argument from linear_to_page()
and __splice_segment() prototypes.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 16:48:08 -08:00
Felipe Balbi
8e8de5ab37 usb: host: ohci-tmio: fix compile warning
Fix the following compile warning:

In file included from drivers/usb/host/ohci-hcd.c:1170:0:
drivers/usb/host/ohci-tmio.c: In function 'tmio_start_hc':
drivers/usb/host/ohci-tmio.c:130:2: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'resource_size_t' [-Wformat]

seen on ARM 32-bit builds.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 16:22:53 -08:00
Andreas Fleig
bc009eca8d USB: Add device quirk for Microsoft VX700 webcam
Add device quirk for Microsoft Lifecam VX700 v2.0 webcams.
Fixes squeaking noise of the microphone.

Signed-off-by: Andreas Fleig <andreasfleig@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 16:01:07 -08:00
Anatolij Gustschin
f66dea709c USB: ehci-fsl: fix regression on mpc5121e
mpc5121e doesn't have system interface registers, accessing this
register address space cause the machine check exception and a
kernel crash:

...
Machine check in kernel mode.
Caused by (from SRR1=49030): Transfer error ack signal
Oops: Machine check, sig: 7 [#1]
MPC5121 ADS
Modules linked in:
NIP: c025fd60 LR: c0265bb4 CTR: 00000000
REGS: df82dac0 TRAP: 0200   Not tainted
(3.7.0-rc7-00641-g81e6c91)
MSR: 00049030 <EE,ME,IR,DR>  CR: 42002024  XER: 20000000
TASK = df824b70[1] 'swapper' THREAD: df82c000
GPR00: 00000000 df82db70 df824b70 df3ed0f0 00000003 00000000 00000000 00000000
GPR08: 00000020 32000000 c03550ec 20000000 22002028 00000000 c0003f5c 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 c0423898 c0450000
GPR24: 00000077 00000002 e5086180 1c000c00 e5086000 df33ec00 00000003 df34e000
NIP [c025fd60] ehci_fsl_setup_phy+0xd0/0x354
LR [c0265bb4] ehci_fsl_setup+0x220/0x284
...

Fix it by checking 'have_sysif_regs' flag before register access.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 16:01:07 -08:00
Fabio Estevam
929473ea05 usb: chipidea: Allow disabling streaming not only in udc mode
When running a scp transfer using a USB/Ethernet adapter the following crash
happens:

$ scp test.tar.gz fabio@192.168.1.100:/home/fabio
fabio@192.168.1.100's password:
test.tar.gz                                      0%    0     0.0KB/s   --:-- ETA
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x2cc/0x2f0()
NETDEV WATCHDOG: eth0 (asix): transmit queue 0 timed out
Modules linked in:
Backtrace:
[<80011c94>] (dump_backtrace+0x0/0x10c) from [<804d3a5c>] (dump_stack+0x18/0x1c)
 r6:000000ff r5:80412388 r4:80685dc0 r3:80696cc0
[<804d3a44>] (dump_stack+0x0/0x1c) from [<80021868>]
(warn_slowpath_common+0x54/0x6c)
[<80021814>] (warn_slowpath_common+0x0/0x6c) from [<80021924>]
(warn_slowpath_fmt+0x38/0x40)
...

Setting SDIS (Stream Disable Mode- bit 4 of USBMODE register) fixes the problem.

However, in current code CI13XXX_DISABLE_STREAMING flag is only set in udc mode,
so allow disabling streaming also in host mode.

Tested on a mx6qsabrelite board.

Suggested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 16:01:07 -08:00
Anatolij Gustschin
7c1029ba17 USB: fsl-mph-dr-of: fix regression on mpc5121e
fsl-ehci probing fails on mpc5121e:
...
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
fsl-ehci fsl-ehci.0: Could not get controller version
fsl-ehci fsl-ehci.0: can't setup
fsl-ehci fsl-ehci.0: USB bus 1 deregistered
fsl-ehci fsl-ehci.0: init fsl-ehci.0 fail, -22
fsl-ehci: probe of fsl-ehci.0 failed with error -22

Fix it by returning appropriate version info for mpc5121, too.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 16:01:06 -08:00
Maxime Ripard
eb614c8b46 USB: select USB_ARCH_HAS_EHCI for MXS
Commit 09f6ffde (USB: EHCI: fix build error by making ChipIdea host a
normal EHCI driver) introduced a dependency on USB_EHCI_HCD for the
chipidea USB host driver, that in turns depends on USB_ARCH_HAS_EHCI.

If this symbol is not set for MXS, the MXS boards are not able to use
the chipidea driver anymore.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 16:01:06 -08:00
Kim Phillips
fb0174723e gianfar: use more portable i/o accessors
in/out_be32 accessors are Power arch centric whereas
ioread/writebe32 are available in other arches.  Also, unlike
in/out_be32, ioread/writebe32 expect non-volatile address arguments.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 15:58:08 -08:00
Rami Rosen
28a28283f8 ipv4: fib: fix a comment.
In fib_frontend.c, there is a confusing comment; NETLINK_CB(skb).portid does not
refer to a pid of sending process, but rather to a netlink portid.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 15:58:08 -08:00
Stanislaw Gruszka
d07d7507bf net, wireless: overwrite default_ethtool_ops
Since:

commit 2c60db0370
Author: Eric Dumazet <edumazet@google.com>
Date:   Sun Sep 16 09:17:26 2012 +0000

    net: provide a default dev->ethtool_ops

wireless core does not correctly assign ethtool_ops.

After alloc_netdev*() call, some cfg80211 drivers provide they own
ethtool_ops, but some do not. For them, wireless core provide generic
cfg80211_ethtool_ops, which is assigned in NETDEV_REGISTER notify call:

        if (!dev->ethtool_ops)
                dev->ethtool_ops = &cfg80211_ethtool_ops;

But after Eric's commit, dev->ethtool_ops is no longer NULL (on cfg80211
drivers without custom ethtool_ops), but points to &default_ethtool_ops.

In order to fix the problem, provide function which will overwrite
default_ethtool_ops and use it by wireless core.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 15:55:48 -08:00
Amerigo Wang
f7e9e230f4 qlge: remove NETIF_F_TSO6 flag
It is werid that qlge driver supports NETIF_F_TSO6 but
not NETIF_F_IPV6_CSUM. This also causes some kernel warning [1]
when VLAN device setups on a qlge interface.

I think the qlge hardware doesn't support NETIF_F_IPV6_CSUM,
so we have to just remove the NETIF_F_TSO6 flag.

After this patch, the TCP/IPv6 traffic becomes normal again,
no kernel warnings any more.

NOTE: I only tested it on 2.6.32 kernel, even if the upstream
kernel could fix this automatically (it is hard to track NETIF*
flags), removing it is also safe.

1. https://bugzilla.redhat.com/show_bug.cgi?id=891839

Cc: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Cc: Ron Mercer <ron.mercer@qlogic.com>
Cc: linux-driver@qlogic.com
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 15:55:10 -08:00
Alexander Duyck
87696f9234 net: Export __netdev_pick_tx so that it can be used in modules
When testing with FCoE enabled we discovered that I had not exported
__netdev_pick_tx.  As a result ixgbe doesn't build with the RFC patches
applied because ixgbe_select_queue was calling the function.  This change
corrects that build issue by correctly exporting __netdev_pick_tx so it
can be used by modules.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-11 15:47:27 -08:00
Linus Torvalds
b719f43059 Fix build error in vexpress driver
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull a hwmon patch from Guenter Roeck:
 "Fix build error in vexpress driver"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (vexpress) Fix build error seen if CONFIG_OF_DEVICE is not set
2013-01-11 14:56:41 -08:00
Linus Torvalds
c727b4c63c Merge branch 'akpm' (incoming fixes from Andrew)
Merge misc fixes from Andrew Morton:
 "The audit fixes have been floating around for a while - Al and Eric
  aren't responding to either myself or Kees so I asked Kees to
  re-review them and here they are."

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (22 commits)
  lib/rbtree.c: avoid the use of non-static __always_inline
  MAINTAINERS: Omar had moved
  mm: compaction: partially revert capture of suitable high-order page
  linux/audit.h: move ptrace.h include to kernel header
  kernel/audit.c: avoid negative sleep durations
  audit: catch possible NULL audit buffers
  audit: create explicit AUDIT_SECCOMP event type
  MAINTAINERS: fix a status pattern
  MAINTAINERS: fix arch/arm/plat-omap/include/plat/omap_hwmod.h
  mm: thp: acquire the anon_vma rwsem for write during split
  mm: mmap: annotate vm_lock_anon_vma locking properly for lockdep
  lockdep, rwsem: provide down_write_nest_lock()
  arch/mn10300/Kconfig: select CONFIG_GENERIC_ATOMIC64
  mm: bootmem: fix free_all_bootmem_core() with odd bitmap alignment
  mm: use aligned zone start for pfn_to_bitidx calculation
  fs/exec.c: work around icc miscompilation
  mm: compaction: fix echo 1 > compact_memory return error issue
  mm: memblock: fix wrong memmove size in memblock_merge_regions()
  drivers/video/ssd1307fb.c: fix bit order bug in the byte translation function
  mm: migrate: check page_count of THP before migrating
  ...
2013-01-11 14:55:15 -08:00
Michel Lespinasse
3cb7a56344 lib/rbtree.c: avoid the use of non-static __always_inline
lib/rbtree.c declared __rb_erase_color() as __always_inline void, and
then exported it with EXPORT_SYMBOL.

This was because __rb_erase_color() must be exported for augmented
rbtree users, but it must also be inlined into rb_erase() so that the
dummy callback can get optimized out of that call site.

(Actually with a modern compiler, none of the dummy callback functions
should even be generated as separate text functions).

The above usage is legal C, but it was unusual enough for some compilers
to warn about it.  This change makes things more explicit, with a static
__always_inline ____rb_erase_color function for use in rb_erase(), and a
separate non-inline __rb_erase_color function for use in
rb_erase_augmented call sites.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:56 -08:00
Chen Gang
a8906b0b67 MAINTAINERS: Omar had moved
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Cc: Omar Ramirez Luna <omar.ramirez@ti.com>
Cc: Omar Ramirez Luna <omar.ramirez@copitl.com>
Cc: David Miller <davem@davemloft.net>
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:56 -08:00
Mel Gorman
8fb74b9fb2 mm: compaction: partially revert capture of suitable high-order page
Eric Wong reported on 3.7 and 3.8-rc2 that ppoll() got stuck when
waiting for POLLIN on a local TCP socket.  It was easier to trigger if
there was disk IO and dirty pages at the same time and he bisected it to
commit 1fb3f8ca0e ("mm: compaction: capture a suitable high-order page
immediately when it is made available").

The intention of that patch was to improve high-order allocations under
memory pressure after changes made to reclaim in 3.6 drastically hurt
THP allocations but the approach was flawed.  For Eric, the problem was
that page->pfmemalloc was not being cleared for captured pages leading
to a poor interaction with swap-over-NFS support causing the packets to
be dropped.  However, I identified a few more problems with the patch
including the fact that it can increase contention on zone->lock in some
cases which could result in async direct compaction being aborted early.

In retrospect the capture patch took the wrong approach.  What it should
have done is mark the pageblock being migrated as MIGRATE_ISOLATE if it
was allocating for THP and avoided races that way.  While the patch was
showing to improve allocation success rates at the time, the benefit is
marginal given the relative complexity and it should be revisited from
scratch in the context of the other reclaim-related changes that have
taken place since the patch was first written and tested.  This patch
partially reverts commit 1fb3f8ca0e ("mm: compaction: capture a
suitable high-order page immediately when it is made available").

Reported-and-tested-by: Eric Wong <normalperson@yhbt.net>
Tested-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:56 -08:00
Mike Frysinger
c0a3a20b6c linux/audit.h: move ptrace.h include to kernel header
While the kernel internals want pt_regs (and so it includes
linux/ptrace.h), the user version of audit.h does not need it.  So move
the include out of the uapi version.

This avoids issues where people want the audit defines and userland
ptrace api.  Including both the kernel ptrace and the userland ptrace
headers can easily lead to failure.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:56 -08:00
Andrew Morton
829199197a kernel/audit.c: avoid negative sleep durations
audit_log_start() performs the same jiffies comparison in two places.
If sufficient time has elapsed between the two comparisons, the second
one produces a negative sleep duration:

  schedule_timeout: wrong timeout value fffffffffffffff0
  Pid: 6606, comm: trinity-child1 Not tainted 3.8.0-rc1+ #43
  Call Trace:
    schedule_timeout+0x305/0x340
    audit_log_start+0x311/0x470
    audit_log_exit+0x4b/0xfb0
    __audit_syscall_exit+0x25f/0x2c0
    sysret_audit+0x17/0x21

Fix it by performing the comparison a single time.

Reported-by: Dave Jones <davej@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:56 -08:00
Kees Cook
0644ec0cc8 audit: catch possible NULL audit buffers
It's possible for audit_log_start() to return NULL.  Handle it in the
various callers.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Julien Tinnes <jln@google.com>
Cc: Will Drewry <wad@google.com>
Cc: Steve Grubb <sgrubb@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:55 -08:00
Kees Cook
7b9205bd77 audit: create explicit AUDIT_SECCOMP event type
The seccomp path was using AUDIT_ANOM_ABEND from when seccomp mode 1
could only kill a process.  While we still want to make sure an audit
record is forced on a kill, this should use a separate record type since
seccomp mode 2 introduces other behaviors.

In the case of "handled" behaviors (process wasn't killed), only emit a
record if the process is under inspection.  This change also fixes
userspace examination of seccomp audit events, since it was considered
malformed due to missing fields of the AUDIT_ANOM_ABEND event type.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Julien Tinnes <jln@google.com>
Acked-by: Will Drewry <wad@chromium.org>
Acked-by: Steve Grubb <sgrubb@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:55 -08:00
Zhang Yanfei
56ca9d9877 MAINTAINERS: fix a status pattern
Change MAINTAINED to Maintained.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:55 -08:00