20 Feb, 2009
2 commits
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This prepares for a real __alloc_percpu, by adding an alignment argument.
Only one place uses __alloc_percpu directly, and that's for a string.tj: af_inet also uses __alloc_percpu(), update it.
Signed-off-by: Rusty Russell
Cc: Christoph Lameter
Cc: Jens Axboe -
Impact: cleanup
There are two allocated per-cpu accessor macros with almost identical
spelling. The original and far more popular is per_cpu_ptr (44
files), so change over the other 4 files.tj: kill percpu_ptr() and update UP too
Signed-off-by: Rusty Russell
Cc: mingo@redhat.com
Cc: lenb@kernel.org
Cc: cpufreq@vger.kernel.org
Signed-off-by: Tejun Heo
10 Feb, 2009
1 commit
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ELF core dump is used for both user land core dump and kernel crash
dump. Depending on architecture, register might need to be accessed
differently for userland and kernel. Allow architectures to define
ELF_CORE_COPY_KERNEL_REGS() and use different operation for kernel
register dump.Signed-off-by: Tejun Heo
Signed-off-by: Ingo Molnar
09 Feb, 2009
3 commits
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Conflicts:
arch/x86/mach-voyager/voyager_smp.c
arch/x86/mm/fault.c -
Impact: bug fix
IA-64 needs to put percpu data in the seperate section even on UP.
Fixes regression caused by "percpu: refactor percpu.h"Signed-off-by: Brian Gerst
Acked-by: Tony Luck
Signed-off-by: Ingo Molnar -
Rename the async_*_special() functions to async_*_domain(), which
describes the purpose of these functions much better.
[Broke up long lines to silence checkpatch]Signed-off-by: Cornelia Huck
Signed-off-by: Arjan van de Ven
08 Feb, 2009
2 commits
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI PM: make the PM core more careful with drivers using the new PM framework
PCI PM: Read power state from device after trying to change it on resume
PCI PM: Do not disable and enable bridges during suspend-resume
PCI: PCIe portdrv: Simplify suspend and resume
PCI PM: Fix saving of device state in pci_legacy_suspend
PCI PM: Check if the state has been saved before trying to restore it
PCI PM: Fix handling of devices without drivers
PCI: return error on failure to read PCI ROMs
PCI: properly clean up ASPM link state on device remove -
Impact: fix spurious BUG_ON() triggered under load
module_refcount() isn't reliable outside stop_machine(), as demonstrated
by Karsten Keil , networking can trigger it under load
(an inc on one cpu and dec on another while module_refcount() is tallying
can give false results, for example).Almost noone should be using __module_get, but that's another issue.
Cc: Karsten Keil
Signed-off-by: Rusty Russell
Signed-off-by: Linus Torvalds
07 Feb, 2009
2 commits
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…isc', 'printk' and 'processor' into release
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Bit 11 in intel PDC definitions is meant for OS capability to handle
hardware coordination of P-states. In Linux we have always supported
hwardware coordination of P-states. Just let the BIOSes know that we
support it, by setting this bit.Some BIOSes use this bit to choose between hardware or software coordination
and without this change below, BIOSes switch to software coordination, which
is not very optimal in terms of power consumption and extra wakeups from idle.Signed-off-by: Venkatesh Pallipadi
Signed-off-by: Len Brown
06 Feb, 2009
4 commits
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Fix namespace violations by changing non-kconfig CONFIG_ names to CNFG_*.
Fixes breakage in staging/, which adds a real CONFIG_PANEL.
Signed-off-by: Randy Dunlap
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
With exclusive waiters, every process woken up through the wait queue must
ensure that the next waiter down the line is woken when it has finished.Interruptible waiters don't do that when aborting due to a signal. And if
an aborting waiter is concurrently woken up through the waitqueue, noone
will ever wake up the next waiter.This has been observed with __wait_on_bit_lock() used by
lock_page_killable(): the first contender on the queue was aborting when
the actual lock holder woke it up concurrently. The aborted contender
didn't acquire the lock and therefor never did an unlock followed by
waking up the next waiter.Add abort_exclusive_wait() which removes the process' wait descriptor from
the waitqueue, iff still queued, or wakes up the next waiter otherwise.
It does so under the waitqueue lock. Racing with a wake up means the
aborting process is either already woken (removed from the queue) and will
wake up the next waiter, or it will remove itself from the queue and the
concurrent wake up will apply to the next waiter after it.Use abort_exclusive_wait() in __wait_event_interruptible_exclusive() and
__wait_on_bit_lock() when they were interrupted by other means than a wake
up through the queue.[akpm@linux-foundation.org: coding-style fixes]
Reported-by: Chris Mason
Signed-off-by: Johannes Weiner
Mentored-by: Oleg Nesterov
Cc: Peter Zijlstra
Cc: Matthew Wilcox
Cc: Chuck Lever
Cc: Nick Piggin
Cc: Ingo Molnar
Cc: ["after some testing"]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Avoid calling copy_from/to_user() with fb_info->lock mutex held in fbmem
ioctl().fb_mmap() is called under mm->mmap_sem (A) held, that also acquires
fb_info->lock (B); fb_ioctl() takes fb_info->lock (B) and does
copy_from/to_user() that might acquire mm->mmap_sem (A), causing a
deadlock.NOTE: it doesn't push down the fb_info->lock in each own driver's
fb_ioctl(), so there are still potential deadlocks elsewhere.Signed-off-by: Andrea Righi
Cc: Dave Jones
Cc: "Rafael J. Wysocki"
Cc: Johannes Weiner
Cc: Krzysztof Helt
Cc: Harvey Harrison
Cc: Stefan Richter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The swap() macro is accidentally retuning the value of its first argument.
Change it into a doesn't-return-anything macro before someone goes and
relies upon this behaviour.Signed-off-by: Peter Zijlstra
Cc: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Feb, 2009
2 commits
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This patch makes the ROM reading code return an error to user space if
the size of the ROM read is equal to 0.The patch also emits a warnings if the contents of the ROM are invalid,
and documents the effects of the "enable" file on ROM reading.Signed-off-by: Timothy S. Nelson
Acked-by: Alex Villacis-Lasso
Signed-off-by: Jesse Barnes -
…l/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: add missing kernel-doc in sched.h
04 Feb, 2009
1 commit
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
sunrpc: fix rdma dependencies
e1000: Fix PCI enable to honor the need_ioport flag
sgi-xp: link XPNET's net_device_ops to its net_device structure
pcnet_cs: Fix misuse of the equality operator.
hso: add new device id's
dca: redesign locks to fix deadlocks
cassini/sungem: limit reaches -1, but 0 tested
net: variables reach -1, but 0 tested
qlge: bugfix: Add missing netif_napi_del call.
qlge: bugfix: Add flash offset for second port.
qlge: bugfix: Fix endian issue when reading flash.
udp: increments sk_drops in __udp_queue_rcv_skb()
net: Fix userland breakage wrt. linux/if_tunnel.h
net: packet socket packet_lookup_frame fix
03 Feb, 2009
12 commits
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* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: implement HORKAGE_1_5_GBPS and apply it to WD My Book
libata: add no penalty retry request for EH device handling routines
libata: improve probe failure handling
libata: add @spd_limit to sata_down_spd_limit()
libata: clear dev->ering in smarter way
libata: check onlineness before using SPD in sata_down_spd_limit()
libata: move ata_dev_disable() to libata-eh.c
libata: fix EH device failure handling
sata_nv: ck804 has borked hardreset too
ide/libata: fix ata_id_is_cfa() (take 4)
libata: fix kernel-doc warnings
ahci: add a module parameter to ignore the SSS flags for async scanning
sata_mv: Fix chip type for Hightpoint RocketRaid 1740/1742
[libata] sata_sil: Fix compilation error with libata debugging enabled -
Add kernel-doc notation for @lock:
include/linux/sched.h:457: No description found for parameter 'lock'
Signed-off-by: Randy Dunlap
Signed-off-by: Ingo Molnar -
3Gbps is often much more prone to transmission failures. It's usually
okay to let EH handle speed down after transmission failures but some
WD My Book drives completely shutdown after certain transmission
failures and after it only power cycling can revive them. Combined
with the fact that external drives often end up with cable assembly
which is longer than usual and more likely to have intervening gender,
this makes these drives very likely to shutdown under certain
configurations virtually rendering them unusable.This patch implements HOARKGE_1_5_GBPS and applies it to WD My Book
such that 1.5Gbps is forced once the device is identified.Please take a look at the following bz for related reports.
http://bugzilla.kernel.org/show_bug.cgi?id=9913
Signed-off-by: Tejun Heo
Signed-off-by: Jeff Garzik -
dev->ering used to be cleared together with the rest of ata_device in
ata_dev_init() which is called whenever a probing event occurs.
dev->ering is about to be used to track probing failures so it needs
to remain persistent over multiple porbing events. This patch
achieves this by doing the following.* Instead of CLEAR_OFFSET, define CLEAR_BEGIN and CLEAR_END and only
clear between BEGIN and END. ering is moved after END. The split
of persistent area is to allow hotter items remain at the head.* ering is explicitly cleared on ata_dev_disable() and when device
attach succeeds. So, ering is persistent throug a device's life
time (unless explicitly cleared of course) and also through periods
inbetween disablement of an attached device and successful detection
of the next one.Signed-off-by: Tejun Heo
Signed-off-by: Jeff Garzik -
When checking for the CFA feature set support, ata_id_is_cfa() tests bit 2 in
word 82 of the identify data instead the word 83; it also checks the ATA/PI
version support in the word 80 (which the CompactFlash specifications have as
reserved), this having no slightest chance to work on the modern CF cards that
don't have 0x848A in the word 0...Signed-off-by: Sergei Shtylyov
Signed-off-by: Jeff Garzik -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI hotplug: Change link order of pciehp & acpiphp
PCI hotplug: fakephp: Allocate PCI resources before adding the device
PCI MSI: Fix undefined shift by 32
PCI PM: Do not wait for buses in B2 or B3 during resume
PCI PM: Power up devices before restoring their state
PCI PM: Fix hibernation breakage on EeePC 701
PCI: irq and pci_ids patch for Intel Tigerpoint DeviceIDs
PCI PM: Fix suspend error paths and testing facility breakage -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
slub: fix per cpu kmem_cache_cpu array memory leak
kmalloc: return NULL instead of link failure -
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (45 commits)
V4L/DVB (10411): s5h1409: Perform s5h1409 soft reset after tuning
V4L/DVB (10403): saa7134-alsa: saa7130 doesn't support digital audio
V4L/DVB (10229): ivtv: fix memory leak
V4L/DVB (10385): gspca - main: Fix memory leak when USB disconnection while streaming.
V4L/DVB (10325): em28xx: Fix for fail to submit URB with IRQs and Pre-emption Disabled
V4L/DVB (10317): radio-mr800: fix radio->muted and radio->stereo
V4L/DVB (10314): cx25840: ignore TUNER_SET_CONFIG in the command callback.
V4L/DVB (10288): af9015: bug fix: stick does not work always when plugged
V4L/DVB (10287): af9015: fix second FE
V4L/DVB (10270): saa7146: fix unbalanced mutex_lock/unlock
V4L/DVB (10265): budget.c driver: Kernel oops: "BUG: unable to handle kernel paging request at ffffffff
V4L/DVB (10261): em28xx: fix kernel panic on audio shutdown
V4L/DVB (10257): em28xx: Fix for KWorld 330U Board
V4L/DVB (10256): em28xx: Fix for KWorld 330U AC97
V4L/DVB (10254): em28xx: Fix audio URB transfer buffer race condition
V4L/DVB (10250): cx25840: fix regression: fw not loaded on first use
V4L/DVB (10248): v4l-dvb: fix a bunch of compile warnings.
V4L/DVB (10243): em28xx: fix compile warning
V4L/DVB (10240): Fix obvious swapped names in v4l2_subdev logic
V4L/DVB (10233): [PATCH] Terratec Cinergy DT XS Diversity new USB ID (0ccd:0081)
... -
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: add text file detailing queue/ sysfs files
bio.h: If they MUST be inlined, then use __always_inline
Fix misleading comment in bio.h
block: fix inconsistent parenthesisation of QUEUE_FLAG_DEFAULT
block: fix oops in blk_queue_io_stat() -
Current refcounting for modules (done if CONFIG_MODULE_UNLOAD=y) is
using a lot of memory.Each 'struct module' contains an [NR_CPUS] array of full cache lines.
This patch uses existing infrastructure (percpu_modalloc() &
percpu_modfree()) to allocate percpu space for the refcount storage.Instead of wasting NR_CPUS*128 bytes (on i386), we now use
nr_cpu_ids*sizeof(local_t) bytes.On a typical distro, where NR_CPUS=8, shiping 2000 modules, we reduce
size of module files by about 2 Mbytes. (1Kb per module)Instead of having all refcounters in the same memory node - with TLB misses
because of vmalloc() - this new implementation permits to have better
NUMA properties, since each CPU will use storage on its preferred node,
thanks to percpu storage.Signed-off-by: Eric Dumazet
Signed-off-by: Rusty Russell
Signed-off-by: Linus Torvalds -
Reported by Andrew Walrond
Changeset c19e654ddbe3831252f61e76a74d661e1a755530
("gre: Add netlink interface") added an include
of linux/ip.h to linux/if_tunnel.hWe can't really let that get exposed to userspace
because this conflicts with types defined in netinet/ip.h
which userland is almost certainly going to have included
either explicitly or implicitly.So guard this include with a __KERNEL__ ifdef.
Signed-off-by: David S. Miller
02 Feb, 2009
3 commits
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bvec_kmap_irq() and bvec_kunmap_irq() comments say they MUST be inlined,
so mark them as __always_inline.Signed-off-by: Alberto Bertogli
Signed-off-by: Jens Axboe -
The comment says "remember to add offset!", but the function already adds
it.Signed-off-by: Alberto Bertogli
Signed-off-by: Jens Axboe -
Signed-off-by: Jens Axboe
01 Feb, 2009
2 commits
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…el/git/tip/linux-2.6-tip
* 'header-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (90 commits)
headers_check fix: x86, swab.h
headers_check fix: x86, sigcontext32.h
headers_check fix: x86, sigcontext.h
headers_check fix: x86, ptrace-abi.h
headers_check fix: x86, mtrr.h
headers_check fix: x86, mce.h
headers_check fix: x86, kvm.h
headers_check fix: x86, e820.h
headers_check fix: linux/rtnetlink.h
headers_check fix: linux/nubus.h
headers_check fix: video/uvesafb.h
headers_check fix: video/sisfb.h
headers_check fix: sound/hdsp.h
headers_check fix: mtd/inftl-user.h
headers_check fix: linux/virtio_net.h
headers_check fix: linux/virtio_console.h
headers_check fix: linux/virtio_blk.h
headers_check fix: linux/videodev.h
headers_check fix: linux/video_encoder.h
headers_check fix: linux/video_decoder.h
... -
…el/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
hrtimer: prevent negative expiry value after clock_was_set()
hrtimers: allow the hot-unplugging of all cpus
hrtimers: increase clock min delta threshold while interrupt hanging
31 Jan, 2009
6 commits
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Impact: fix linker screwup on x86_32
Recent x86_64 zerobased patches introduced PERCPU_VADDR() to put
.data.percpu to a predefined address and re-defined PERCPU() in terms
of it. The new macro defined one extra symbol, __per_cpu_load, for
LMA of the section so that the init data could be accessed. This new
symbol introduced the following problems to x86_32.1. If __per_cpu_load is defined outside of .data.percpu as an absolute
symbol, relocation generation for relocatable kernel fails due to
absolute relocation.2. If __per_cpu_load is put inside .data.percpu with absolute address
assignment to work around #1, linker gets confused and under
certain configurations ends up relocating the symbol against
.data.percpu such that the load address gets added on top of
already set load address.As x86_32 doesn't use predefined address for .data.percpu, there's no
need for it to care about the possibility of __per_cpu_load being
different from __per_cpu_start.This patch defines PERCPU() separately so that __per_cpu_load is
defined inside .data.percpu so that everything is ordinary
linking-wise.Signed-off-by: Tejun Heo
Signed-off-by: Ingo Molnar -
Impact: fix CPU hotplug hang on Power6 testbox
On architectures that support offlining all cpus (at least powerpc/pseries),
hot-unpluging the tick_do_timer_cpu can result in a system hang.This comes from the fact that if the cpu going down happens to be the
cpu doing the tick, then as the tick_do_timer_cpu handover happens after the
cpu is dead (via the CPU_DEAD notification), we're left without ticks,
jiffies are frozen and any task relying on timers (msleep, ...) is stuck.
That's particularly the case for the cpu looping in __cpu_die() waiting
for the dying cpu to be dead.This patch addresses this by having the tick_do_timer_cpu handover happen
earlier during the CPU_DYING notification. For this, a new clockevent
notification type is introduced (CLOCK_EVT_NOTIFY_CPU_DYING) which is triggered
in hrtimer_cpu_notify().Signed-off-by: Sebastien Dugue
Cc:
Signed-off-by: Ingo Molnar -
fix the following 'make headers_check' warning:
usr/include/linux/rtnetlink.h:328: found __[us]{8,16,32,64} type without #include
Signed-off-by: Jaswinder Singh Rajput
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fix the following 'make headers_check' warning:
usr/include/linux/nubus.h:232: found __[us]{8,16,32,64} type without #include
Signed-off-by: Jaswinder Singh Rajput
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fix the following 'make headers_check' warning:
usr/include/video/uvesafb.h:5: found __[us]{8,16,32,64} type without #include
Signed-off-by: Jaswinder Singh Rajput
