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This file is controlled by a tristate Kconfig option, and hence
needs to include module.h so that it can get module_init() once
we relocate it from init.h into module.h in the future.
Note that module_exit() appears to be missing from the driver, so
it is questionable whether it would actually work for a removal
and reload cycle if it was configured for a modular build.
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: linux-sh@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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This file is built off of a tristate Kconfig option and also contains
modular function calls so it should explicitly include module.h to
avoid compile breakage during header shuffles done in the future.
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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This file is built off of a tristate Kconfig option and also contains
modular function calls so it should explicitly include module.h to
avoid compile breakage during header shuffles done in the future.
Cc: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-pcmcia@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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These files are built off of a tristate Kconfig option and also contain
modular function calls so they should explicitly include module.h to
avoid compile breakage during header shuffles done in the future.
We change the one header file wich gives us coverage on both files:
drivers/hsi/controllers/omap_ssi.c
drivers/hsi/controllers/omap_ssi_port.c
Cc: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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These files are built off of a tristate Kconfig option and also contain
modular function calls so they should explicitly include module.h to
avoid compile breakage during header shuffles done in the future.
Cc: David Airlie <airlied@linux.ie>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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This file is built off of a tristate Kconfig option and also contains
modular function calls so it should explicitly include module.h to
avoid compile breakage during header shuffles done in the future.
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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These files are built off of the tristate COMMON_CLK_MAX77686 and
COMMON_CLK_MAX77802 respectively. They also contains modular function
calls so they should explicitly include module.h to avoid compile
breakage during header shuffles done in the future.
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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This patch fixes mips compilation error:
lib/mpi/generic_mpih-mul1.c: In function 'mpihelp_mul_1':
lib/mpi/longlong.h:651:2: error: impossible constraint in 'asm'
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/10546/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The GIC chained handlers use do_IRQ() to call the subhandlers. This
means that irq_enter() calls get nested, which leads to preempt count
looking like we're in nested interrupts, which in turn leads to all
system time being accounted as IRQ time in account_system_time().
Fix it by using generic_handle_irq(). Since these same functions are
used in some systems (if cpu_has_veic) from a low-level vectored
interrupt handler which does not go throught do_IRQ(), we need to do it
conditionally.
Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: tglx@linutronix.de
Cc: jason@lakedaemon.net
Patchwork: https://patchwork.linux-mips.org/patch/10545/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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This patch fix URL (http to https) for wiki.wireshark.org.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, we can ask to authenticate DATA chunks and we can send DATA
chunks on the same packet as COOKIE_ECHO, but if you try to combine
both, the DATA chunk will be sent unauthenticated and peer won't accept
it, leading to a communication failure.
This happens because even though the data was queued after it was
requested to authenticate DATA chunks, it was also queued before we
could know that remote peer can handle authenticating, so
sctp_auth_send_cid() returns false.
The fix is whenever we set up an active key, re-check send queue for
chunks that now should be authenticated. As a result, such packet will
now contain COOKIE_ECHO + AUTH + DATA chunks, in that order.
Reported-by: Liu Wei <weliu@redhat.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Although the extended tables are theoretically a completely orthogonal
feature to PASID and anything else that *uses* the newly-available bits,
some of the early hardware has problems even when all we do is enable
them and use only the same bits that were in the old context tables.
For now, there's no motivation to support extended tables unless we're
going to use PASID support to do SVM. So just don't use them unless
PASID support is advertised too. Also add a command-line bailout just in
case later chips also have issues.
The equivalent problem for PASID support has already been fixed with the
upcoming VT-d spec update and commit bd00c606a ("iommu/vt-d: Change
PASID support to bit 40 of Extended Capability Register"), because the
problematic platforms use the old definition of the PASID-capable bit,
which is now marked as reserved and meaningless.
So with this change, we'll magically start using ECS again only when we
see the new hardware advertising "hey, we have PASID support and we
actually tested it this time" on bit 40.
The VT-d hardware architect has promised that we are not going to have
any reason to support ECS *without* PASID any time soon, and he'll make
sure he checks with us before changing that.
In the future, if hypothetical new features also use new bits in the
context tables and can be seen on implementations *without* PASID support,
we might need to add their feature bits to the ecs_enabled() macro.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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MD_RECOVERY_DONE is normally cleared by md_check_recovery after a
resync etc finished. However it is possible for raid5_start_reshape
to race and start a reshape before MD_RECOVERY_DONE is cleared. This
can lean to multiple reshapes running at the same time, which isn't
good.
To make sure it is cleared before starting a reshape, and also clear
it when reaping a thread, just to be safe.
Signed-off-by: NeilBrown <neilb@suse.de>
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Checking ->sync_thread without holding the mddev_lock()
isn't really safe, even after flushing the workqueue which
ensures md_start_sync() has been run.
While this code is waiting for the lock, md_check_recovery could reap
the thread itself, and then start another thread (e.g. recovery might
finish, then reshape starts). When this thread gets the lock
md_start_sync() hasn't run so it doesn't get reaped, but
MD_RECOVERY_RUNNING gets cleared. This allows two threads to start
which leads to confusion.
So don't both if MD_RECOVERY_RUNNING isn't set, but if it is do
the flush and the test and the reap all under the mddev_lock to
avoid any race with md_check_recovery.
Signed-off-by: NeilBrown <neilb@suse.de>
Fixes: 6791875e2e53 ("md: make reconfig_mutex optional for writes to md sysfs files.")
Cc: stable@vger.kernel.org (v4.0+)
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Returning zero from a 'store' function is bad.
The return value should be either len length of the string
or an error.
So use 'len' if 'err' is zero.
Fixes: 6791875e2e53 ("md: make reconfig_mutex optional for writes to md sysfs files.")
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@vger.kernel (v4.0+)
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Some drivers implement only pause operation (no resuming). Example is
pl330 where pause is needed for getting residuum. pl330 does not support
resume operation, transfer must be stopped after pause.
However for slaves this is exposed always as "pause and resume" which
introduces subtle errors on Odroid U3 board (Exynos4412 with pl330).
After adding pause function to pl330 driver the audio playback
(utilizing DMA) gets choppy after some time (approximately 24 hours).
Fix this by exposing "cmd_pause" if and only if pause and resume are
implemented.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reported-by: gabriel@unseen.is
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: <stable@vger.kernel.org>
Fixes: 88987d2c7534 ("dmaengine: pl330: add DMA_PAUSE feature")
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The previous patch tried to continue the probe if i915 binding fails.
For for simplicity reason, we haven't implemented abort even for
controller chips that are dedicated for HDMI/DP on HSW and BDW.
However, Mengdong suggested that this can be dangerous; BIOS may
disable gfx power well although the PCI entry for HD-audio is left,
and this may result in the unexpected behavior, kernel errors, etc.
For avoiding this situation, abort the probe at i915 binding failure
only for HSW/BDW chips selectively. For other chips, it still
continues.
Fixes: bf06848bdbe5 ('ALSA: hda - Continue probing even if i915 binding fails')
Reported-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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We saw excessive direct memory compaction triggered by skb_page_frag_refill.
This causes performance issues and add latency. Commit 5640f7685831e0
introduces the order-3 allocation. According to the changelog, the order-3
allocation isn't a must-have but to improve performance. But direct memory
compaction has high overhead. The benefit of order-3 allocation can't
compensate the overhead of direct memory compaction.
This patch makes the order-3 page allocation atomic. If there is no memory
pressure and memory isn't fragmented, the alloction will still success, so we
don't sacrifice the order-3 benefit here. If the atomic allocation fails,
direct memory compaction will not be triggered, skb_page_frag_refill will
fallback to order-0 immediately, hence the direct memory compaction overhead is
avoided. In the allocation failure case, kswapd is waken up and doing
compaction, so chances are allocation could success next time.
alloc_skb_with_frags is the same.
The mellanox driver does similar thing, if this is accepted, we must fix
the driver too.
V3: fix the same issue in alloc_skb_with_frags as pointed out by Eric
V2: make the changelog clearer
Cc: Eric Dumazet <edumazet@google.com>
Cc: Chris Mason <clm@fb.com>
Cc: Debabrata Banerjee <dbavatar@gmail.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If a device is renamed and the original name is subsequently reused
for a new device, the following warning is generated:
sysctl duplicate entry: /net/mpls/conf/veth0//input
CPU: 3 PID: 1379 Comm: ip Not tainted 4.1.0-rc4+ #20
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
0000000000000000 0000000000000000 ffffffff81566aaf 0000000000000000
ffffffff81236279 ffff88002f7d7f00 0000000000000000 ffff88000db336d8
ffff88000db33698 0000000000000005 ffff88002e046000 ffff8800168c9280
Call Trace:
[<ffffffff81566aaf>] ? dump_stack+0x40/0x50
[<ffffffff81236279>] ? __register_sysctl_table+0x289/0x5a0
[<ffffffffa051a24f>] ? mpls_dev_notify+0x1ff/0x300 [mpls_router]
[<ffffffff8108db7f>] ? notifier_call_chain+0x4f/0x70
[<ffffffff81470e72>] ? register_netdevice+0x2b2/0x480
[<ffffffffa0524748>] ? veth_newlink+0x178/0x2d3 [veth]
[<ffffffff8147f84c>] ? rtnl_newlink+0x73c/0x8e0
[<ffffffff8147f27a>] ? rtnl_newlink+0x16a/0x8e0
[<ffffffff81459ff2>] ? __kmalloc_reserve.isra.30+0x32/0x90
[<ffffffff8147ccfd>] ? rtnetlink_rcv_msg+0x8d/0x250
[<ffffffff8145b027>] ? __alloc_skb+0x47/0x1f0
[<ffffffff8149badb>] ? __netlink_lookup+0xab/0xe0
[<ffffffff8147cc70>] ? rtnetlink_rcv+0x30/0x30
[<ffffffff8149e7a0>] ? netlink_rcv_skb+0xb0/0xd0
[<ffffffff8147cc64>] ? rtnetlink_rcv+0x24/0x30
[<ffffffff8149df17>] ? netlink_unicast+0x107/0x1a0
[<ffffffff8149e4be>] ? netlink_sendmsg+0x50e/0x630
[<ffffffff8145209c>] ? sock_sendmsg+0x3c/0x50
[<ffffffff81452beb>] ? ___sys_sendmsg+0x27b/0x290
[<ffffffff811bd258>] ? mem_cgroup_try_charge+0x88/0x110
[<ffffffff811bd5b6>] ? mem_cgroup_commit_charge+0x56/0xa0
[<ffffffff811d7700>] ? do_filp_open+0x30/0xa0
[<ffffffff8145336e>] ? __sys_sendmsg+0x3e/0x80
[<ffffffff8156c3f2>] ? system_call_fastpath+0x16/0x75
Fix this by unregistering the previous sysctl table (registered for
the path containing the original device name) and re-registering the
table for the path containing the new device name.
Fixes: 37bde79979c3 ("mpls: Per-device enabling of packet input")
Reported-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Robert Shearman <rshearma@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When programming the start of a periodic output, the code wrongly places
the seconds value into the "low" register and the nanoseconds into the
"high" register. Even though this is backwards, it slipped through my
testing, because the re-arming code in the interrupt service routine is
correct, and the signal does appear starting with the second edge.
This patch fixes the issue by programming the registers correctly.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Not all architectures have io memory.
Fixes:
drivers/block/pmem.c: In function ‘pmem_alloc’:
drivers/block/pmem.c:146:2: error: implicit declaration of function ‘ioremap_nocache’ [-Werror=implicit-function-declaration]
pmem->virt_addr = ioremap_nocache(pmem->phys_addr, pmem->size);
^
drivers/block/pmem.c:146:18: warning: assignment makes pointer from integer without a cast [enabled by default]
pmem->virt_addr = ioremap_nocache(pmem->phys_addr, pmem->size);
^
drivers/block/pmem.c:182:2: error: implicit declaration of function ‘iounmap’ [-Werror=implicit-function-declaration]
iounmap(pmem->virt_addr);
^
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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=================================
[ INFO: inconsistent lock state ]
4.1.0-rc7+ #217 Tainted: G O
---------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
swapper/6/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
(ext_devt_lock){+.?...}, at: [<ffffffff8143a60c>] blk_free_devt+0x3c/0x70
{SOFTIRQ-ON-W} state was registered at:
[<ffffffff810bf6b1>] __lock_acquire+0x461/0x1e70
[<ffffffff810c1947>] lock_acquire+0xb7/0x290
[<ffffffff818ac3a8>] _raw_spin_lock+0x38/0x50
[<ffffffff8143a07d>] blk_alloc_devt+0x6d/0xd0 <-- take the lock in process context
[..]
[<ffffffff810bf64e>] __lock_acquire+0x3fe/0x1e70
[<ffffffff810c00ad>] ? __lock_acquire+0xe5d/0x1e70
[<ffffffff810c1947>] lock_acquire+0xb7/0x290
[<ffffffff8143a60c>] ? blk_free_devt+0x3c/0x70
[<ffffffff818ac3a8>] _raw_spin_lock+0x38/0x50
[<ffffffff8143a60c>] ? blk_free_devt+0x3c/0x70
[<ffffffff8143a60c>] blk_free_devt+0x3c/0x70 <-- take the lock in softirq
[<ffffffff8143bfec>] part_release+0x1c/0x50
[<ffffffff8158edf6>] device_release+0x36/0xb0
[<ffffffff8145ac2b>] kobject_cleanup+0x7b/0x1a0
[<ffffffff8145aad0>] kobject_put+0x30/0x70
[<ffffffff8158f147>] put_device+0x17/0x20
[<ffffffff8143c29c>] delete_partition_rcu_cb+0x16c/0x180
[<ffffffff8143c130>] ? read_dev_sector+0xa0/0xa0
[<ffffffff810e0e0f>] rcu_process_callbacks+0x2ff/0xa90
[<ffffffff810e0dcf>] ? rcu_process_callbacks+0x2bf/0xa90
[<ffffffff81067e2e>] __do_softirq+0xde/0x600
Neil sees this in his tests and it also triggers on pmem driver unbind
for the libnvdimm tests. This fix is on top of an initial fix by Keith
for incorrect usage of mutex_lock() in this path: 2da78092dda1 "block:
Fix dev_t minor allocation lifetime". Both this and 2da78092dda1 are
candidates for -stable.
Fixes: 2da78092dda1 ("block: Fix dev_t minor allocation lifetime")
Cc: <stable@vger.kernel.org>
Cc: Keith Busch <keith.busch@intel.com>
Reported-by: NeilBrown <neilb@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Some error paths didn't unreserve the BO. This resulted in a deadlock
down the road on the next attempt to reserve the (still reserved) BO.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90873
Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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This reverts commit 7fe04d6fa824ccea704535a597dc417c8687f990.
Fixes some systems at the expense of others. Need to properly
fix the pll divider selection.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=99651
Cc: stable@vger.kernel.org
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This reverts commit a10f0df0615abb194968fc08147f3cdd70fd5aa5.
Fixes some systems at the expense of others. Need to properly
fix the pll divider selection.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=99651
Cc: stable@vger.kernel.org
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Laptop with Turks/Thames GPU will freeze if dpm is enabled. It seems
the SMC engine is relying on some state inside the CP engine. CP needs
to chew at least one packet for it to get in good state for dynamic
power management.
This patch simply disabled and re-enable DPM after the ring test which
is enough to avoid the freeze.
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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The producer should be used producer_fifo as its sched_priority,
so correct it.
Link: http://lkml.kernel.org/r/1433923957-67842-1-git-send-email-long.wanglong@huawei.com
Cc: stable@vger.kernel.org # 2.6.33+
Signed-off-by: Wang Long <long.wanglong@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Commit ab760a0 (ntb: Adding split BAR support for Haswell platforms)
changed ntb_device's mw from a fixed-size array into a pointer that is
allocated based on limits.max_mw; however, on Atom platforms, max_mw
is not initialized until ntb_device_setup(), which happens after the
allocation.
Fill out max_mw in ntb_atom_detect() to match ntb_xeon_detect(); this
happens before the use of max_mw in the ndev->mw allocation.
Fixes a null pointer dereference on Atom platforms with ntb hardware.
v2: fix typo (mw_max should be max_mw)
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
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Yet another regression by the transition to regmap cache; for better
usability, we had the fake mute control using the zero amp value for
Conexant codecs, and this was forgotten in the new hda core code.
Since the bits 4-7 are unused for the amp registers (as we follow the
syntax of AMP_GET verb), the bit 4 is now used to indicate the fake
mute. For setting this flag, snd_hda_codec_amp_update() becomes a
function from a simple macro. The bonus is that it gained a proper
function description.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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When incoming packet qualifies for rx_copybreak, we copy the data to newly
allocated skb. We do not free/unmap the original buffer. At this point driver
assumes this buffer is unallocated. When enic_rq_alloc_buf() is called for
buffer allocation, it checks if buf->os_buf is NULL. If its not NULL that means
buffer can be re-used.
When vnic_rq_clean() is called for freeing all rq buffers, and if the
rx_copybreak reused buffer falls outside the used desc, we do not free the
buffer. The following trace is observer when dma-debug is enabled.
Fix is to walk through complete ring and clean if buffer is present.
[ 40.555386] ------------[ cut here ]------------
[ 40.555396] WARNING: CPU: 0 PID: 491 at lib/dma-debug.c:971 dma_debug_device_change+0x188/0x1f0()
[ 40.555400] pci 0000:06:00.0: DMA-API: device driver has pending DMA allocations while released from device [count=4]
One of leaked entries details: [device address=0x00000000ff4cc040] [size=9018 bytes] [mapped with DMA_FROM_DEVICE] [mapped as single]
[ 40.555402] Modules linked in: nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 dns_resolver coretemp intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw joydev mousedev gf128mul hid_generic glue_helper mgag200 usbhid ttm hid drm_kms_helper drm ablk_helper syscopyarea sysfillrect sysimgblt i2c_algo_bit i2c_core iTCO_wdt cryptd mac_hid evdev pcspkr sb_edac edac_core tpm_tis iTCO_vendor_support ipmi_si wmi tpm ipmi_msghandler shpchp lpc_ich processor acpi_power_meter hwmon button ac sch_fq_codel nfs lockd grace sunrpc fscache sd_mod ehci_pci ehci_hcd megaraid_sas usbcore scsi_mod usb_common enic(-) crc32c_generic crc32c_intel btrfs xor raid6_pq ext4 crc16 mbcache jbd2
[ 40.555467] CPU: 0 PID: 491 Comm: rmmod Not tainted 4.1.0-rc7-ARCH-01305-gf59b71f #118
[ 40.555469] Hardware name: Cisco Systems Inc UCSB-B200-M4/UCSB-B200-M4, BIOS B200M4.2.2.2.23.061220140128 06/12/2014
[ 40.555471] 0000000000000000 00000000e2f8a5b7 ffff880275f8bc48 ffffffff8158d6f0
[ 40.555474] 0000000000000000 ffff880275f8bca0 ffff880275f8bc88 ffffffff8107b04a
[ 40.555477] ffff8802734e0000 0000000000000004 ffff8804763fb3c0 ffff88027600b650
[ 40.555480] Call Trace:
[ 40.555488] [<ffffffff8158d6f0>] dump_stack+0x4f/0x7b
[ 40.555492] [<ffffffff8107b04a>] warn_slowpath_common+0x8a/0xc0
[ 40.555494] [<ffffffff8107b0d5>] warn_slowpath_fmt+0x55/0x70
[ 40.555498] [<ffffffff812fa408>] dma_debug_device_change+0x188/0x1f0
[ 40.555503] [<ffffffff8109aaef>] notifier_call_chain+0x4f/0x80
[ 40.555506] [<ffffffff8109aecb>] __blocking_notifier_call_chain+0x4b/0x70
[ 40.555510] [<ffffffff8109af06>] blocking_notifier_call_chain+0x16/0x20
[ 40.555514] [<ffffffff813f8066>] __device_release_driver+0xf6/0x120
[ 40.555518] [<ffffffff813f8b08>] driver_detach+0xc8/0xd0
[ 40.555523] [<ffffffff813f7c59>] bus_remove_driver+0x59/0xe0
[ 40.555527] [<ffffffff813f93a0>] driver_unregister+0x30/0x70
[ 40.555534] [<ffffffff8131532d>] pci_unregister_driver+0x2d/0xa0
[ 40.555542] [<ffffffffa0200ec2>] enic_cleanup_module+0x10/0x14e [enic]
[ 40.555547] [<ffffffff8110158f>] SyS_delete_module+0x1cf/0x280
[ 40.555551] [<ffffffff811e284e>] ? ____fput+0xe/0x10
[ 40.555554] [<ffffffff810980ec>] ? task_work_run+0xbc/0xf0
[ 40.555558] [<ffffffff815930ee>] system_call_fastpath+0x12/0x71
[ 40.555561] ---[ end trace 4988cadc77c2b236 ]---
[ 40.555562] Mapped at:
[ 40.555563] [<ffffffff812fa865>] debug_dma_map_page+0x95/0x150
[ 40.555566] [<ffffffffa01f4a88>] enic_rq_alloc_buf+0x1b8/0x360 [enic]
[ 40.555570] [<ffffffffa01f7658>] enic_open+0xf8/0x820 [enic]
[ 40.555574] [<ffffffff8148d50e>] __dev_open+0xce/0x150
[ 40.555579] [<ffffffff8148d851>] __dev_change_flags+0xa1/0x170
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
We do not check the return value of enic_dev_stats_dump(). If allocation
fails, we will hit NULL pointer reference.
Return only if memory allocation fails. For other failures, we return the
previously recorded values.
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
There is a small window between vnic_intr_unmask() and enic_poll_unlock_napi().
In this window if an irq occurs and napi is scheduled on different cpu, it tries
to acquire enic_poll_lock_napi() and hits the following WARN_ON message.
Fix is to unlock napi_poll before unmasking the interrupt.
[ 781.121746] ------------[ cut here ]------------
[ 781.121789] WARNING: CPU: 1 PID: 0 at drivers/net/ethernet/cisco/enic/vnic_rq.h:228 enic_poll_msix_rq+0x36a/0x3c0 [enic]()
[ 781.121834] Modules linked in: nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 dns_resolver coretemp intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel mgag200 ttm drm_kms_helper joydev aes_x86_64 lrw drm gf128mul mousedev glue_helper sb_edac ablk_helper iTCO_wdt iTCO_vendor_support evdev ipmi_si syscopyarea sysfillrect sysimgblt i2c_algo_bit i2c_core edac_core lpc_ich mac_hid cryptd pcspkr ipmi_msghandler shpchp tpm_tis acpi_power_meter tpm wmi processor hwmon button ac sch_fq_codel nfs lockd grace sunrpc fscache hid_generic usbhid hid ehci_pci ehci_hcd sd_mod megaraid_sas usbcore scsi_mod usb_common enic crc32c_generic crc32c_intel btrfs xor raid6_pq ext4 crc16 mbcache jbd2
[ 781.122176] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.1.0-rc6-ARCH-00040-gc46a024-dirty #106
[ 781.122210] Hardware name: Cisco Systems Inc UCSB-B200-M4/UCSB-B200-M4, BIOS B200M4.2.2.2.23.061220140128 06/12/2014
[ 781.122252] 0000000000000000 bddbbc9d655ec96e ffff880277e43da8 ffffffff81583fe8
[ 781.122286] 0000000000000000 0000000000000000 ffff880277e43de8 ffffffff8107acfa
[ 781.122319] ffff880272c01000 ffff880273f18000 ffff880273f1a100 0000000000000000
[ 781.122352] Call Trace:
[ 781.122364] <IRQ> [<ffffffff81583fe8>] dump_stack+0x4f/0x7b
[ 781.122399] [<ffffffff8107acfa>] warn_slowpath_common+0x8a/0xc0
[ 781.122425] [<ffffffff8107ae2a>] warn_slowpath_null+0x1a/0x20
[ 781.122455] [<ffffffffa01fa9ca>] enic_poll_msix_rq+0x36a/0x3c0 [enic]
[ 781.122487] [<ffffffff8148525a>] net_rx_action+0x22a/0x370
[ 781.122512] [<ffffffff8107ed3d>] __do_softirq+0xed/0x2d0
[ 781.122537] [<ffffffff8107f06e>] irq_exit+0x7e/0xa0
[ 781.122560] [<ffffffff8158c424>] do_IRQ+0x64/0x100
[ 781.122582] [<ffffffff8158a42e>] common_interrupt+0x6e/0x6e
[ 781.122605] <EOI> [<ffffffff810bd331>] ? cpu_startup_entry+0x121/0x480
[ 781.122638] [<ffffffff810bd2fc>] ? cpu_startup_entry+0xec/0x480
[ 781.122667] [<ffffffff810f2ed3>] ? clockevents_register_device+0x113/0x1f0
[ 781.122698] [<ffffffff81050ab6>] start_secondary+0x196/0x1e0
[ 781.122723] ---[ end trace cec2e9dd3af7b9db ]---
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Jeff Layton reported the following;
[ 74.232485] ------------[ cut here ]------------
[ 74.233354] WARNING: CPU: 2 PID: 754 at net/core/sock.c:364 sk_clear_memalloc+0x51/0x80()
[ 74.234790] Modules linked in: cts rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache xfs libcrc32c snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device nfsd snd_pcm snd_timer snd e1000 ppdev parport_pc joydev parport pvpanic soundcore floppy serio_raw i2c_piix4 pcspkr nfs_acl lockd virtio_balloon acpi_cpufreq auth_rpcgss grace sunrpc qxl drm_kms_helper ttm drm virtio_console virtio_blk virtio_pci ata_generic virtio_ring pata_acpi virtio
[ 74.243599] CPU: 2 PID: 754 Comm: swapoff Not tainted 4.1.0-rc6+ #5
[ 74.244635] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 74.245546] 0000000000000000 0000000079e69e31 ffff8800d066bde8 ffffffff8179263d
[ 74.246786] 0000000000000000 0000000000000000 ffff8800d066be28 ffffffff8109e6fa
[ 74.248175] 0000000000000000 ffff880118d48000 ffff8800d58f5c08 ffff880036e380a8
[ 74.249483] Call Trace:
[ 74.249872] [<ffffffff8179263d>] dump_stack+0x45/0x57
[ 74.250703] [<ffffffff8109e6fa>] warn_slowpath_common+0x8a/0xc0
[ 74.251655] [<ffffffff8109e82a>] warn_slowpath_null+0x1a/0x20
[ 74.252585] [<ffffffff81661241>] sk_clear_memalloc+0x51/0x80
[ 74.253519] [<ffffffffa0116c72>] xs_disable_swap+0x42/0x80 [sunrpc]
[ 74.254537] [<ffffffffa01109de>] rpc_clnt_swap_deactivate+0x7e/0xc0 [sunrpc]
[ 74.255610] [<ffffffffa03e4fd7>] nfs_swap_deactivate+0x27/0x30 [nfs]
[ 74.256582] [<ffffffff811e99d4>] destroy_swap_extents+0x74/0x80
[ 74.257496] [<ffffffff811ecb52>] SyS_swapoff+0x222/0x5c0
[ 74.258318] [<ffffffff81023f27>] ? syscall_trace_leave+0xc7/0x140
[ 74.259253] [<ffffffff81798dae>] system_call_fastpath+0x12/0x71
[ 74.260158] ---[ end trace 2530722966429f10 ]---
The warning in question was unnecessary but with Jeff's series the rules
are also clearer. This patch removes the warning and updates the comment
to explain why sk_mem_reclaim() may still be called.
[jlayton: remove if (sk->sk_forward_alloc) conditional. As Leon
points out that it's not needed.]
Cc: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Since the addition of sysfs multicast router support if one set
multicast_router to "2" more than once, then the port would be added to
the hlist every time and could end up linking to itself and thus causing an
endless loop for rlist walkers.
So to reproduce just do:
echo 2 > multicast_router; echo 2 > multicast_router;
in a bridge port and let some igmp traffic flow, for me it hangs up
in br_multicast_flood().
Fix this by adding a check in br_multicast_add_router() if the port is
already linked.
The reason this didn't happen before the addition of multicast_router
sysfs entries is because there's a !hlist_unhashed check that prevents
it.
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Fixes: 0909e11758bd ("bridge: Add multicast_router sysfs entries")
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
If the TIPC connection timer expires in a probing state, a
self abort message is supposed to be generated and delivered
to the local socket. This is currently broken, and the abort
message is actually sent out to the peer node with invalid
addressing information. This will cause the link to enter
a constant retransmission state and eventually reset.
We fix this by removing the self-abort message creation and
tear down connection immediately instead.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Currently snd-hda-intel driver aborts the probing of Intel HD-audio
controller with i915 power well management when binding with i915
driver via hda_i915_init() fails. This is no big problem for Haswell
and Broadwell where the HD-audio controllers are dedicated to
HDMI/DP, thus i915 link is mandatory. However, Skylake, Baytrail and
Braswell have only one controller and both HDMI/DP and analog codecs
share the same bus. Thus, even if HDMI/DP isn't usable, we should
keep the controller working for other codecs.
For fixing this, this patch simply allows continuing the probing even
if hda_i915_init() call fails. This may leave stale sound components
for HDMI/DP devices that are unbound with graphics. We could abort
the probing selectively, but from the code simplicity POV, it's better
to continue in all cases.
Reported-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
|
|
Fix this compile issue with gcc-4.4.4:
arch/x86/kvm/mmu.c: In function 'kvm_mmu_pte_write':
arch/x86/kvm/mmu.c:4256: error: unknown field 'cr0_wp' specified in initializer
arch/x86/kvm/mmu.c:4257: error: unknown field 'cr4_pae' specified in initializer
arch/x86/kvm/mmu.c:4257: warning: excess elements in union initializer
...
gcc-4.4.4 (at least) has issues when using anonymous unions in
initializers.
Fixes: edc90b7dc4ceef6 ("KVM: MMU: fix SMAP virtualization")
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Jovi Zhangwei reported the following problem
Below kernel vm bug can be triggered by tcpdump which mmaped a lot of pages
with GFP_COMP flag.
[Mon May 25 05:29:33 2015] page:ffffea0015414000 count:66 mapcount:1 mapping: (null) index:0x0
[Mon May 25 05:29:33 2015] flags: 0x20047580004000(head)
[Mon May 25 05:29:33 2015] page dumped because: VM_BUG_ON_PAGE(compound_order(page) && !PageTransHuge(page))
[Mon May 25 05:29:33 2015] ------------[ cut here ]------------
[Mon May 25 05:29:33 2015] kernel BUG at mm/migrate.c:1661!
[Mon May 25 05:29:33 2015] invalid opcode: 0000 [#1] SMP
In this case it was triggered by running tcpdump but it's not necessary
reproducible on all systems.
sudo tcpdump -i bond0.100 'tcp port 4242' -c 100000000000 -w 4242.pcap
Compound pages cannot be migrated and it was not expected that such pages
be marked for NUMA balancing. This did not take into account that drivers
such as net/packet/af_packet.c may insert compound pages into userspace
with vm_insert_page. This patch tells the NUMA balancing protection
scanner to skip all VM_MIXEDMAP mappings which avoids the possibility that
compound pages are marked for migration.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Jovi Zhangwei <jovi@cloudflare.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
If zs_create_pool()->create_handle_cache()->kmem_cache_create() or
pool->name allocation fails, zs_create_pool()->destroy_handle_cache()
will dereference the NULL pool->handle_cachep.
Modify destroy_handle_cache() to avoid this.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
On -rt, the VM_BUG_ON(!irqs_disabled()) triggers inside the memcg
swapout path because the spin_lock_irq(&mapping->tree_lock) in the
caller doesn't actually disable the hardware interrupts - which is fine,
because on -rt the tophalves run in process context and so we are still
safe from preemption while updating the statistics.
Remove the VM_BUG_ON() but keep the comment of what we rely on.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: Clark Williams <williams@redhat.com>
Cc: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Commit d5e616fc1c1d ("checkpatch: add a few more --fix corrections")
broke the GLOBAL_INITIALISERS test with bad parentheses and optional
leading spaces.
Fix it.
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Bandan Das <bsd@makefile.in>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Clear zram disk io accounting when resetting the zram device. Otherwise
the residual io accounting stat will affect the diskstat in the next
zram active cycle.
Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
When trimming memcg consumption excess (see memory.high), we call
try_to_free_mem_cgroup_pages without checking if we are allowed to sleep
in the current context, which can result in a deadlock. Fix this.
Fixes: 241994ed8649 ("mm: memcontrol: default hierarchy interface for memory")
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Izumi found the following oops when hot re-adding a node:
BUG: unable to handle kernel paging request at ffffc90008963690
IP: __wake_up_bit+0x20/0x70
Oops: 0000 [#1] SMP
CPU: 68 PID: 1237 Comm: rs:main Q:Reg Not tainted 4.1.0-rc5 #80
Hardware name: FUJITSU PRIMEQUEST2800E/SB, BIOS PRIMEQUEST 2000 Series BIOS Version 1.87 04/28/2015
task: ffff880838df8000 ti: ffff880017b94000 task.ti: ffff880017b94000
RIP: 0010:[<ffffffff810dff80>] [<ffffffff810dff80>] __wake_up_bit+0x20/0x70
RSP: 0018:ffff880017b97be8 EFLAGS: 00010246
RAX: ffffc90008963690 RBX: 00000000003c0000 RCX: 000000000000a4c9
RDX: 0000000000000000 RSI: ffffea101bffd500 RDI: ffffc90008963648
RBP: ffff880017b97c08 R08: 0000000002000020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a0797c73800
R13: ffffea101bffd500 R14: 0000000000000001 R15: 00000000003c0000
FS: 00007fcc7ffff700(0000) GS:ffff880874800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90008963690 CR3: 0000000836761000 CR4: 00000000001407e0
Call Trace:
unlock_page+0x6d/0x70
generic_write_end+0x53/0xb0
xfs_vm_write_end+0x29/0x80 [xfs]
generic_perform_write+0x10a/0x1e0
xfs_file_buffered_aio_write+0x14d/0x3e0 [xfs]
xfs_file_write_iter+0x79/0x120 [xfs]
__vfs_write+0xd4/0x110
vfs_write+0xac/0x1c0
SyS_write+0x58/0xd0
system_call_fastpath+0x12/0x76
Code: 5d c3 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 48 83 ec 20 65 48 8b 04 25 28 00 00 00 48 89 45 f8 31 c0 48 8d 47 48 <48> 39 47 48 48 c7 45 e8 00 00 00 00 48 c7 45 f0 00 00 00 00 48
RIP [<ffffffff810dff80>] __wake_up_bit+0x20/0x70
RSP <ffff880017b97be8>
CR2: ffffc90008963690
Reproduce method (re-add a node)::
Hot-add nodeA --> remove nodeA --> hot-add nodeA (panic)
This seems an use-after-free problem, and the root cause is
zone->wait_table was not set to *NULL* after free it in
try_offline_node.
When hot re-add a node, we will reuse the pgdat of it, so does the zone
struct, and when add pages to the target zone, it will init the zone
first (including the wait_table) if the zone is not initialized. The
judgement of zone initialized is based on zone->wait_table:
static inline bool zone_is_initialized(struct zone *zone)
{
return !!zone->wait_table;
}
so if we do not set the zone->wait_table to *NULL* after free it, the
memory hotplug routine will skip the init of new zone when hot re-add
the node, and the wait_table still points to the freed memory, then we
will access the invalid address when trying to wake up the waiting
people after the i/o operation with the page is done, such as mentioned
above.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Reported-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Reviewed by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This reverts commit 0243508edd317ff1fa63b495643a7c192fbfcd92.
It introduces new regressions.
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The latest version of modinfo fails to compile score architecture
targets with the following error.
FATAL: The relocation at __ex_table+0x634 references
section "__ex_table" which is not executable, IOW
the kernel will fault if it ever tries to
jump to it. Something is seriously wrong
and should be fixed.
The probem is caused by a bad label in an __ex_table entry.
Acked-by: Lennox Wu <lennox.wu@gmail.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
|
|
Fix
include/asm-generic/io.h: In function 'readb':
include/asm-generic/io.h:113:2: error:
implicit declaration of function 'bfin_read8'
include/asm-generic/io.h: In function 'readw':
include/asm-generic/io.h:121:2: error:
implicit declaration of function 'bfin_read16'
include/asm-generic/io.h: In function 'readl':
include/asm-generic/io.h:129:2: error:
implicit declaration of function 'bfin_read32'
include/asm-generic/io.h: In function 'writeb':
include/asm-generic/io.h:147:2: error:
implicit declaration of function 'bfin_write8'
include/asm-generic/io.h: In function 'writew':
include/asm-generic/io.h:155:2: error:
implicit declaration of function 'bfin_write16'
include/asm-generic/io.h: In function 'writel':
include/asm-generic/io.h:163:2: error:
implicit declaration of function 'bfin_write32'
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: 1a3372bc522ef ("blackfin: io: define __raw_readx/writex with
bfin_readx/writex")
Cc: Steven Miao <realmz6@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
|
|
Due to the slightly odd way that new threads and processes start execution
when scheduled for the very first time they were bypassing the required
disable_msa call.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
If CONFIG_SERIAL_8250 is set to m, the Loongson seria.ko module might get
unloaded while the serial driver modules are still loaded resulting in
stale references to the destroyed platform_device instance.
Anyway, platform devices should always be registered indicated what
devices are present, _not_ what drivers have been configured.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Patchwork: https://patchwork.linux-mips.org/patch/10538/
|
Paul Gortmaker
Linus Torvalds
Jaedon Shin
Rabin Vincent
Masanari Iida
Marcelo Ricardo Leitner
David Woodhouse
NeilBrown
Krzysztof Kozlowski
Takashi Iwai
Shaohua Li
Robert Shearman
Richard Cochran
Richard Weinberger
Dan Williams
Michel Dänzer
Alex Deucher
Jérôme Glisse
Wang Long
Daniel Verkamp
Govindarajulu Varadarajan
Mel Gorman
Nikolay Aleksandrov
Erik Hugne
Andrew Morton
Sergey Senozhatsky
Johannes Weiner
Joe Perches
Weijie Yang
Vladimir Davydov
Gu Zheng
David S. Miller
Guenter Roeck
Ralf Baechle