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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, ext3, reiserfs, quota fixes from Jan Kara:
"A fix for regression in ext2, and a format string issue in ext3. The
rest isn't too serious."
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: Fix BUG_ON in evict() on inode deletion
reiserfs: Use kstrdup instead of kmalloc/strcpy
ext3: Fix format string issues
quota: add missing use of dq_data_lock in __dquot_initialize
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Creating snapshot passes extent_root to commit its transaction,
but it can lead to the warning of checking root for quota in
the __btrfs_end_transaction() when someone else is committing
the current transaction. Since we've recorded the needed root
in trans_handle, just use it to get rid of the warning.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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If one of qgroup fails to reserve firstly, we should return immediately,
it is unnecessary to continue check.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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The callers of lookup_inline_extent_info all handle getting an error back
properly, so return an error if we have corruption instead of being a jerk and
panicing. Still WARN_ON() since this is kind of crucial and I've been seeing it
a bit too much recently for my taste, I think we're doing something wrong
somewhere. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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Doing this would reliably fail with -EBUSY for me:
# mount /dev/sdb2 /mnt/scratch; umount /mnt/scratch; mkfs.btrfs -f /dev/sdb2
...
unable to open /dev/sdb2: Device or resource busy
because mkfs.btrfs tries to open the device O_EXCL, and somebody still has it.
Using systemtap to track bdev gets & puts shows a kworker thread doing a
blkdev put after mkfs attempts a get; this is left over from the unmount
path:
btrfs_close_devices
__btrfs_close_devices
call_rcu(&device->rcu, free_device);
free_device
INIT_WORK(&device->rcu_work, __free_device);
schedule_work(&device->rcu_work);
so unmount might complete before __free_device fires & does its blkdev_put.
Adding an rcu_barrier() to btrfs_close_devices() causes unmount to wait
until all blkdev_put()s are done, and the device is truly free once
unmount completes.
Cc: stable@vger.kernel.org
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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Remove a useless function declaration
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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Using spinning case instead of blocking will result in better concurrency
overall.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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Seems that the tracer flags have never been protected from
synchronous writes. Luckily, admins don't usually modify the
tracing flags via two different tasks. But if scripts were to
be used to modify them, then they could get corrupted.
Move the trace_types_lock that protects against tracers changing
to also protect the flags being set.
Cc: stable@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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With deferred setup for SCO, it is possible that userspace closes the
socket when it is in the BT_CONNECT2 state, after the Connect Request is
received but before the Accept Synchonous Connection is sent.
If this happens the following crash was observed, when the connection is
terminated:
[ +0.000003] hci_sync_conn_complete_evt: hci0 status 0x10
[ +0.000005] sco_connect_cfm: hcon ffff88003d1bd800 bdaddr 40:98:4e:32:d7:39 status 16
[ +0.000003] sco_conn_del: hcon ffff88003d1bd800 conn ffff88003cc8e300, err 110
[ +0.000015] BUG: unable to handle kernel NULL pointer dereference at 0000000000000199
[ +0.000906] IP: [<ffffffff810620dd>] __lock_acquire+0xed/0xe82
[ +0.000000] PGD 3d21f067 PUD 3d291067 PMD 0
[ +0.000000] Oops: 0002 [#1] SMP
[ +0.000000] Modules linked in: rfcomm bnep btusb bluetooth
[ +0.000000] CPU 0
[ +0.000000] Pid: 1481, comm: kworker/u:2H Not tainted 3.9.0-rc1-25019-gad82cdd #1 Bochs Bochs
[ +0.000000] RIP: 0010:[<ffffffff810620dd>] [<ffffffff810620dd>] __lock_acquire+0xed/0xe82
[ +0.000000] RSP: 0018:ffff88003c3c19d8 EFLAGS: 00010002
[ +0.000000] RAX: 0000000000000001 RBX: 0000000000000246 RCX: 0000000000000000
[ +0.000000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88003d1be868
[ +0.000000] RBP: ffff88003c3c1a98 R08: 0000000000000002 R09: 0000000000000000
[ +0.000000] R10: ffff88003d1be868 R11: ffff88003e20b000 R12: 0000000000000002
[ +0.000000] R13: ffff88003aaa8000 R14: 000000000000006e R15: ffff88003d1be850
[ +0.000000] FS: 0000000000000000(0000) GS:ffff88003e200000(0000) knlGS:0000000000000000
[ +0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ +0.000000] CR2: 0000000000000199 CR3: 000000003c1cb000 CR4: 00000000000006b0
[ +0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ +0.000000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ +0.000000] Process kworker/u:2H (pid: 1481, threadinfo ffff88003c3c0000, task ffff88003aaa8000)
[ +0.000000] Stack:
[ +0.000000] ffffffff81b16342 0000000000000000 0000000000000000 ffff88003d1be868
[ +0.000000] ffffffff00000000 00018c0c7863e367 000000003c3c1a28 ffffffff8101efbd
[ +0.000000] 0000000000000000 ffff88003e3d2400 ffff88003c3c1a38 ffffffff81007c7a
[ +0.000000] Call Trace:
[ +0.000000] [<ffffffff8101efbd>] ? kvm_clock_read+0x34/0x3b
[ +0.000000] [<ffffffff81007c7a>] ? paravirt_sched_clock+0x9/0xd
[ +0.000000] [<ffffffff81007fd4>] ? sched_clock+0x9/0xb
[ +0.000000] [<ffffffff8104fd7a>] ? sched_clock_local+0x12/0x75
[ +0.000000] [<ffffffff810632d1>] lock_acquire+0x93/0xb1
[ +0.000000] [<ffffffffa0022339>] ? spin_lock+0x9/0xb [bluetooth]
[ +0.000000] [<ffffffff8105f3d8>] ? lock_release_holdtime.part.22+0x4e/0x55
[ +0.000000] [<ffffffff814f6038>] _raw_spin_lock+0x40/0x74
[ +0.000000] [<ffffffffa0022339>] ? spin_lock+0x9/0xb [bluetooth]
[ +0.000000] [<ffffffff814f6936>] ? _raw_spin_unlock+0x23/0x36
[ +0.000000] [<ffffffffa0022339>] spin_lock+0x9/0xb [bluetooth]
[ +0.000000] [<ffffffffa00230cc>] sco_conn_del+0x76/0xbb [bluetooth]
[ +0.000000] [<ffffffffa002391d>] sco_connect_cfm+0x2da/0x2e9 [bluetooth]
[ +0.000000] [<ffffffffa000862a>] hci_proto_connect_cfm+0x38/0x65 [bluetooth]
[ +0.000000] [<ffffffffa0008d30>] hci_sync_conn_complete_evt.isra.79+0x11a/0x13e [bluetooth]
[ +0.000000] [<ffffffffa000cd96>] hci_event_packet+0x153b/0x239d [bluetooth]
[ +0.000000] [<ffffffff814f68ff>] ? _raw_spin_unlock_irqrestore+0x48/0x5c
[ +0.000000] [<ffffffffa00025f6>] hci_rx_work+0xf3/0x2e3 [bluetooth]
[ +0.000000] [<ffffffff8103efed>] process_one_work+0x1dc/0x30b
[ +0.000000] [<ffffffff8103ef83>] ? process_one_work+0x172/0x30b
[ +0.000000] [<ffffffff8103e07f>] ? spin_lock_irq+0x9/0xb
[ +0.000000] [<ffffffff8103fc8d>] worker_thread+0x123/0x1d2
[ +0.000000] [<ffffffff8103fb6a>] ? manage_workers+0x240/0x240
[ +0.000000] [<ffffffff81044211>] kthread+0x9d/0xa5
[ +0.000000] [<ffffffff81044174>] ? __kthread_parkme+0x60/0x60
[ +0.000000] [<ffffffff814f75bc>] ret_from_fork+0x7c/0xb0
[ +0.000000] [<ffffffff81044174>] ? __kthread_parkme+0x60/0x60
[ +0.000000] Code: d7 44 89 8d 50 ff ff ff 4c 89 95 58 ff ff ff e8 44 fc ff ff 44 8b 8d 50 ff ff ff 48 85 c0 4c 8b 95 58 ff ff ff 0f 84 7a 04 00 00 <f0> ff 80 98 01 00 00 83 3d 25 41 a7 00 00 45 8b b5 e8 05 00 00
[ +0.000000] RIP [<ffffffff810620dd>] __lock_acquire+0xed/0xe82
[ +0.000000] RSP <ffff88003c3c19d8>
[ +0.000000] CR2: 0000000000000199
[ +0.000000] ---[ end trace e73cd3b52352dd34 ]---
Cc: stable@vger.kernel.org [3.8]
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Tested-by: Frederic Dalleau <frederic.dalleau@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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On LTC2978, only READ_TEMPERATURE is supported. It reports
the internal junction temperature. This register is unpaged.
On LTC3880, READ_TEMPERATURE and READ_TEMPERATURE2 are supported.
READ_TEMPERATURE is paged and reports external temperatures.
READ_TEMPERATURE2 is unpaged and reports the internal junction
temperature.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org # 3.2+
Acked-by: Jean Delvare <khali@linux-fr.org>
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Hi.
I'm trying to send big chunks of memory from application address space via
TCP socket using vmsplice + splice like this
mem = mmap(128Mb);
vmsplice(pipe[1], mem); /* splice memory into pipe */
splice(pipe[0], tcp_socket); /* send it into network */
When I'm lucky and a huge page splices into the pipe and then into the socket
_and_ client and server ends of the TCP connection are on the same host,
communicating via lo, the whole connection gets stuck! The sending queue
becomes full and app stops writing/splicing more into it, but the receiving
queue remains empty, and that's why.
The __skb_fill_page_desc observes a tail page of a huge page and erroneously
propagates its page->pfmemalloc value onto socket (the pfmemalloc on tail pages
contain garbage). Then this skb->pfmemalloc leaks through lo and due to the
tcp_v4_rcv
sk_filter
if (skb->pfmemalloc && !sock_flag(sk, SOCK_MEMALLOC)) /* true */
return -ENOMEM
goto release_and_discard;
no packets reach the socket. Even TCP re-transmits are dropped by this, as skb
cloning clones the pfmemalloc flag as well.
That said, here's the proper page->pfmemalloc propagation onto socket: we
must check the huge-page's head page only, other pages' pfmemalloc and mapping
values do not contain what is expected in this place. However, I'm not sure
whether this fix is _complete_, since pfmemalloc propagation via lo also
oesn't look great.
Both, bit propagation from page to skb and this check in sk_filter, were
introduced by c48a11c7 (netvm: propagate page->pfmemalloc to skb), in v3.5 so
Mel and stable@ are in Cc.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Chrome OS team reported a crash on a Pixel ChromeBook in TCP stack :
https://code.google.com/p/chromium/issues/detail?id=182056
commit a21d45726acac (tcp: avoid order-1 allocations on wifi and tx
path) did a poor choice adding an 'avail_size' field to skb, while
what we really needed was a 'reserved_tailroom' one.
It would have avoided commit 22b4a4f22da (tcp: fix retransmit of
partially acked frames) and this commit.
Crash occurs because skb_split() is not aware of the 'avail_size'
management (and should not be aware)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Mukesh Agrawal <quiche@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If there are no internal speakers, we should not turn the eapd switch
off, because it might be necessary to keep high for Headphone.
BugLink: https://bugs.launchpad.net/bugs/1155016
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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If krealloc() returns NULL, it *doesn't* free the original. So any code
of the form 'foo = krealloc(foo, …);' is almost certainly a bug.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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pem_[input|fan]_attributes
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Cc: stable@vger.kernel.org
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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This partially reverts commit 1696e6bc2ae83734e64e206ac99766ea19e9a14e
("mtd: nand: kill NAND_NO_READRDY").
In that patch I overlooked a few things.
The original documentation for NAND_NO_READRDY included "True for all
large page devices, as they do not support autoincrement." I was
conflating "not support autoincrement" with the NAND_NO_AUTOINCR option,
which was in fact doing nothing. So, when I dropped NAND_NO_AUTOINCR, I
concluded that I then could harmlessly drop NAND_NO_READRDY. But of
course the fact the NAND_NO_AUTOINCR was doing nothing didn't mean
NAND_NO_READRDY was doing nothing...
So, NAND_NO_READRDY is re-introduced as NAND_NEED_READRDY and applied
only to those few remaining small-page NAND which needed it in the first
place.
Cc: stable@kernel.org [3.5+]
Reported-by: Alexander Shiyan <shc_work@mail.ru>
Tested-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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The i.MX25 DT machine descriptor calls a non existing imx25_timer_init()
function. This patch adds it to fix compilation.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The tokens MADV_HUGEPAGE and MADV_NOHUGEPAGE are not available with
glibc 2.12 and older. Define these tokens if they are not already
defined.
This patch fixes these build errors with older versions of glibc.
CC bench/numa.o
bench/numa.c: In function ‘alloc_data’:
bench/numa.c:334: error: ‘MADV_HUGEPAGE’ undeclared (first use in this function)
bench/numa.c:334: error: (Each undeclared identifier is reported only once
bench/numa.c:334: error: for each function it appears in.)
bench/numa.c:341: error: ‘MADV_NOHUGEPAGE’ undeclared (first use in this function)
make: *** [bench/numa.o] Error 1
Signed-off-by: Vinson Lee <vlee@twitter.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Irina Tirdea <irina.tirdea@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1363214064-4671-2-git-send-email-vlee@twitter.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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fix typo error introduced by commit ea0e6276 (usb: gadget: add
multiple definition guards) which causes the following build warning:
warning: "pr_vdebug" redefined
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Commit 032ec49f5351e9cb242b1a1c367d14415043ab95 (usb: musb: drop useless
board_mode usage) introduced a typo that breaks the build.
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
[ Fixed commit message ]
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
Signed-off-by: Michael Riesch <michael.riesch@omicron.at>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Fix an infinite loop when suspending or resuming a device with AIC5.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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gpio suspend/resume and wakeup sources where not managed when using pinctrl so
it was impossible to wake up the system with a gpio.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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Atomic pool should always be allocated from DMA zone if such zone is
available in the system to avoid issues caused by limited dma mask of
any of the devices used for making an atomic allocation.
Reported-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Stable <stable@vger.kernel.org> [v3.6+]
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent
Pull tracing fixes from Steven Rostedt.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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With the recent locking updates, the only thing protected by
workqueue_lock is workqueue->maydays list. Rename workqueue_lock to
wq_mayday_lock.
This patch is pure rename.
Signed-off-by: Tejun Heo <tj@kernel.org>
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This patch continues locking cleanup from the previous patch. It
breaks out pool_workqueue synchronization from workqueue_lock into a
new spinlock - pwq_lock. The followings are protected by pwq_lock.
* workqueue->pwqs
* workqueue->saved_max_active
The conversion is straight-forward. workqueue_lock usages which cover
the above two are converted to pwq_lock. New locking label PW added
for things protected by pwq_lock and FR is updated to mean flush_mutex
+ pwq_lock + sched-RCU.
This patch shouldn't introduce any visible behavior changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
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Currently, workqueue_lock protects most shared workqueue resources -
the pools, workqueues, pool_workqueues, draining, ID assignments,
mayday handling and so on. The coverage has grown organically and
there is no identified bottleneck coming from workqueue_lock, but it
has grown a bit too much and scheduled rebinding changes need the
pools and workqueues to be protected by a mutex instead of a spinlock.
This patch breaks out pool and workqueue synchronization from
workqueue_lock into a new mutex - wq_mutex. The followings are
protected by wq_mutex.
* worker_pool_idr and unbound_pool_hash
* pool->refcnt
* workqueues list
* workqueue->flags, ->nr_drainers
Most changes are mostly straight-forward. workqueue_lock is replaced
with wq_mutex where applicable and workqueue_lock lock/unlocks are
added where wq_mutex conversion leaves data structures not protected
by wq_mutex without locking. irq / preemption flippings were added
where the conversion affects them. Things worth noting are
* New WQ and WR locking lables added along with
assert_rcu_or_wq_mutex().
* worker_pool_assign_id() now expects to be called under wq_mutex.
* create_mutex is removed from get_unbound_pool(). It now just holds
wq_mutex.
This patch shouldn't introduce any visible behavior changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
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They're split across debugobj code for some reason. Collect them.
This patch is pure relocation.
Signed-off-by: Tejun Heo <tj@kernel.org>
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When a manager creates or destroys workers, the operations are always
done with the manager_mutex held; however, initial worker creation or
worker destruction during pool release don't grab the mutex. They are
still correct as initial worker creation doesn't require
synchronization and grabbing manager_arb provides enough exclusion for
pool release path.
Still, let's make everyone follow the same rules for consistency and
such that lockdep annotations can be added.
Update create_and_start_worker() and put_unbound_pool() to grab
manager_mutex around thread creation and destruction respectively and
add lockdep assertions to create_worker() and destroy_worker().
This patch doesn't introduce any visible behavior changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
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get_unbound_pool(), workqueue_cpu_up_callback() and init_workqueues()
have similar code pieces to create and start the initial worker factor
those out into create_and_start_worker().
This patch doesn't introduce any functional changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
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Manager operations are currently governed by two mutexes -
pool->manager_arb and ->assoc_mutex. The former is used to decide who
gets to be the manager and the latter to exclude the actual manager
operations including creation and destruction of workers. Anyone who
grabs ->manager_arb must perform manager role; otherwise, the pool
might stall.
Grabbing ->assoc_mutex blocks everyone else from performing manager
operations but doesn't require the holder to perform manager duties as
it's merely blocking manager operations without becoming the manager.
Because the blocking was necessary when [dis]associating per-cpu
workqueues during CPU hotplug events, the latter was named
assoc_mutex. The mutex is scheduled to be used for other purposes, so
this patch gives it a more fitting generic name - manager_mutex - and
updates / adds comments to explain synchronization around the manager
role and operations.
This patch is pure rename / doc update.
Signed-off-by: Tejun Heo <tj@kernel.org>
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There's no reason to make these trivial wrappers full (exported)
functions. Inline the followings.
queue_work()
queue_delayed_work()
mod_delayed_work()
schedule_work_on()
schedule_work()
schedule_delayed_work_on()
schedule_delayed_work()
keventd_up()
Signed-off-by: Tejun Heo <tj@kernel.org>
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Rename @id argument of for_each_pool() to @pi so that it doesn't get
reused accidentally when for_each_pool() is used in combination with
other iterators.
This patch is purely cosmetic.
Signed-off-by: Tejun Heo <tj@kernel.org>
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* Update incorrect and add missing synchronization labels.
* Update incorrect or misleading comments. Add new comments where
clarification is necessary. Reformat / rephrase some comments.
* drain_workqueue() can be used separately from destroy_workqueue()
but its warning message was incorrectly referring to destruction.
Other than the warning message change, this patch doesn't make any
functional changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
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Since 9e8cd2f589 ("workqueue: implement apply_workqueue_attrs()"),
init_and_link_pwq() may be called to initialize a new pool_workqueue
for a workqueue which is already online, but the function was setting
pwq->max_active to wq->saved_max_active without proper
synchronization.
Fix it by calling pwq_adjust_max_active() under proper locking instead
of manually setting max_active.
Signed-off-by: Tejun Heo <tj@kernel.org>
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Rename pwq_set_max_active() to pwq_adjust_max_active() and move
pool_workqueue->max_active synchronization and max_active
determination logic into it.
The new function should be called with workqueue_lock held for stable
workqueue->saved_max_active, determines the current max_active value
the target pool_workqueue should be using from @wq->saved_max_active
and the state of the associated pool, and applies it with proper
synchronization.
The current two users - workqueue_set_max_active() and
thaw_workqueues() - are updated accordingly. In addition, the manual
freezing handling in __alloc_workqueue_key() and
freeze_workqueues_begin() are replaced with calls to
pwq_adjust_max_active().
This centralizes max_active handling so that it's less error-prone.
Signed-off-by: Tejun Heo <tj@kernel.org>
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pwq_set_max_active() is gonna be modified and used during
pool_workqueue init. Move it above init_and_link_pwq().
This patch is pure code reorganization and doesn't introduce any
functional changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace bugfixes from Eric Biederman:
"This tree includes a partial revert for "fs: Limit sys_mount to only
request filesystem modules." When I added the new style module aliases
to the filesystems I deleted the old ones. A bad move. It turns out
that distributions like Arch linux use module aliases when
constructing ramdisks. Which meant ultimately that an ext3 filesystem
mounted with ext4 would not result in the ext4 module being put into
the ramdisk.
The other change in this tree adds a handful of filesystem module
alias I simply failed to add the first time. Which inconvinienced a
few folks using cifs.
I don't want to inconvinience folks any longer than I have to so here
are these trivial fixes."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
fs: Readd the fs module aliases.
fs: Limit sys_mount to only request filesystem modules. (Part 3)
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Merge misc fixes from Andrew Morton:
- A bunch of fixes
- Finish off the idr API conversions before someone starts to use the
old interfaces again.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
idr: idr_alloc() shouldn't trigger lowmem warning when preloaded
UAPI: fix endianness conditionals in M32R's asm/stat.h
UAPI: fix endianness conditionals in linux/raid/md_p.h
UAPI: fix endianness conditionals in linux/acct.h
UAPI: fix endianness conditionals in linux/aio_abi.h
decompressors: fix typo "POWERPC"
mm/fremap.c: fix oops on error path
idr: deprecate idr_pre_get() and idr_get_new[_above]()
tidspbridge: convert to idr_alloc()
zcache: convert to idr_alloc()
mlx4: remove leftover idr_pre_get() call
workqueue: convert to idr_alloc()
nfsd: convert to idr_alloc()
nfsd: remove unused get_new_stid()
kernel/signal.c: use __ARCH_HAS_SA_RESTORER instead of SA_RESTORER
signal: always clear sa_restorer on execve
mm: remove_memory(): fix end_pfn setting
include/linux/res_counter.h needs errno.h
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GFP_NOIO is often used for idr_alloc() inside preloaded section as the
allocation mask doesn't really matter. If the idr tree needs to be
expanded, idr_alloc() first tries to allocate using the specified
allocation mask and if it fails falls back to the preloaded buffer. This
order prevent non-preloading idr_alloc() users from taking advantage of
preloading ones by using preload buffer without filling it shifting the
burden of allocation to the preload users.
Unfortunately, this allowed/expected-to-fail kmem_cache allocation ends up
generating spurious slab lowmem warning before succeeding the request from
the preload buffer.
This patch makes idr_layer_alloc() add __GFP_NOWARN to the first
kmem_cache attempt and try kmem_cache again w/o __GFP_NOWARN after
allocation from preload_buffer fails so that lowmem warning is generated
if not suppressed by the original @gfp_mask.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: David Teigland <teigland@redhat.com>
Tested-by: David Teigland <teigland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In the UAPI header files, __BIG_ENDIAN and __LITTLE_ENDIAN must be
compared against __BYTE_ORDER in preprocessor conditionals where these are
exposed to userspace (that is they're not inside __KERNEL__ conditionals).
However, in the main kernel the norm is to check for
"defined(__XXX_ENDIAN)" rather than comparing against __BYTE_ORDER and
this has incorrectly leaked into the userspace headers.
The definition of struct stat64 in M32R's asm/stat.h is wrong in this way.
Note that userspace will likely interpret the field order incorrectly as
the big-endian variant on little-endian machines - depending on header
inclusion order.
[!!!] NOTE [!!!] This patch may adversely change the userspace API. It might
be better to fix the ordering of st_blocks and __pad4 in struct stat64.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In the UAPI header files, __BIG_ENDIAN and __LITTLE_ENDIAN must be
compared against __BYTE_ORDER in preprocessor conditionals where these are
exposed to userspace (that is they're not inside __KERNEL__ conditionals).
However, in the main kernel the norm is to check for
"defined(__XXX_ENDIAN)" rather than comparing against __BYTE_ORDER and
this has incorrectly leaked into the userspace headers.
The definition of struct mdp_superblock_s in linux/raid/md_p.h is wrong in
this way. Note that userspace will likely interpret the ordering of the
fields incorrectly as the big-endian variant on a little-endian machines -
depending on header inclusion order.
[!!!] NOTE [!!!] This patch may adversely change the userspace API. It might
be better to fix the ordering of events_hi, events_lo, cp_events_hi and
cp_events_lo in struct mdp_superblock_s / typedef mdp_super_t.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In the UAPI header files, __BIG_ENDIAN and __LITTLE_ENDIAN must be
compared against __BYTE_ORDER in preprocessor conditionals where these are
exposed to userspace (that is they're not inside __KERNEL__ conditionals).
However, in the main kernel the norm is to check for
"defined(__XXX_ENDIAN)" rather than comparing against __BYTE_ORDER and
this has incorrectly leaked into the userspace headers.
The definition of ACCT_BYTEORDER in linux/acct.h is wrong in this way.
Note that userspace will likely interpret this incorrectly as the
big-endian variant on little-endian machines - depending on header
inclusion order.
[!!!] NOTE [!!!] This patch may adversely change the userspace API. It might
be better to fix the value of ACCT_BYTEORDER.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In the UAPI header files, __BIG_ENDIAN and __LITTLE_ENDIAN must be
compared against __BYTE_ORDER in preprocessor conditionals where these are
exposed to userspace (that is they're not inside __KERNEL__ conditionals).
However, in the main kernel the norm is to check for
"defined(__XXX_ENDIAN)" rather than comparing against __BYTE_ORDER and
this has incorrectly leaked into the userspace headers.
The definition of PADDED() in linux/aio_abi.h is wrong in this way. Note
that userspace will likely interpret this and thus the order of fields in
struct iocb incorrectly as the little-endian variant on big-endian
machines - depending on header inclusion order.
[!!!] NOTE [!!!] This patch may adversely change the userspace API. It might
be better to fix the ordering of aio_key and aio_reserved1 in struct iocb.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 5dc49c75a26b ("decompressors: make the default XZ_DEC_* config
match the selected architecture") added
default y if POWERPC
to lib/xz/Kconfig. But there is no Kconfig symbol POWERPC. The most
general Kconfig symbol for the powerpc architecture is PPC. So let's
use that.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Lasse Collin <lasse.collin@tukaani.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If find_vma() fails, sys_remap_file_pages() will dereference `vma', which
contains NULL. Fix it by checking the pointer.
(We could alternatively check for err==0, but this seems more direct)
(The vm_flags change is to squish a bogus used-uninitialised warning
without adding extra code).
Reported-by: Tommi Rantala <tt.rantala@gmail.com>
Cc: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Now that all in-kernel users are converted to ues the new alloc
interface, mark the old interface deprecated. We should be able to
remove these in a few releases.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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idr_get_new*() and friends are about to be deprecated. Convert to the
new idr_alloc() interface.
There are some peculiarities and possible bugs in the converted
functions. This patch preserves those.
* drv_insert_node_res_element() returns -ENOMEM on alloc failure,
-EFAULT if id space is exhausted. -EFAULT is at best misleading.
* drv_proc_insert_strm_res_element() is even weirder. It returns
-EFAULT if kzalloc() fails, -ENOMEM if idr preloading fails and
-EPERM if id space is exhausted. What's going on here?
* drv_proc_insert_strm_res_element() doesn't free *pstrm_res after
failure.
Only compile tested.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
Cc: Rene Sapiens <rene.sapiens@ti.com>
Cc: Armando Uribe <x0095078@ti.com>
Cc: Omar Ramirez Luna <omar.ramirez@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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idr_get_new*() and friends are about to be deprecated. Convert to the
new idr_alloc() interface.
Only compile tested.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 6a9200603d76 ("IB/mlx4: convert to idr_alloc()") forgot to remove
idr_pre_get() call in mlx4_ib_cm_paravirt_init(). It's unnecessary and
idr_pre_get() will soon be deprecated. Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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