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Dependencies of CONFIG_SUSPEND and CONFIG_HIBERNATION introduced by commit
296699de6bdc717189a331ab6bbe90e05c94db06 "Introduce CONFIG_SUSPEND for
suspend-to-Ram and standby" are incorrect, as they don't cover the facts that
(1) not all architectures support suspend and (2) SMP hibernation is only
possible on X86 and PPC64 (if CONFIG_PPC64_SWSUSP is set).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Some drives choke on READ_NATIVE_MAX_ADDRESS[_EXT]. Implement
ATA_HORKAGE_BROKEN_HPA and apply it to affected drives.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Some compilers (especially older gcc releases) may skip inlining
sometimes which will lead to link failures. Force the inlining of
keyfunctions in slub_def.h to avoid these issues.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Jan Dittmer <jdi@l4x.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Cell phone networks do link layer retransmissions and other
things that cause unnecessary timeout retransmits. So allow
the minimum RTO to be inflated per-route to deal with this.
Signed-off-by: David S. Miller <davem@davemloft.net>
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de-HZ-ification of the granularity defaults unearthed a pre-existing
property of CFS: while it correctly converges to the granularity goal,
it does not prevent run-time fluctuations in the range of
[-gran ... 0 ... +gran].
With the increase of the granularity due to the removal of HZ
dependencies, this becomes visible in chew-max output (with 5 tasks
running):
out: 28 . 27. 32 | flu: 0 . 0 | ran: 9 . 13 | per: 37 . 40
out: 27 . 27. 32 | flu: 0 . 0 | ran: 17 . 13 | per: 44 . 40
out: 27 . 27. 32 | flu: 0 . 0 | ran: 9 . 13 | per: 36 . 40
out: 29 . 27. 32 | flu: 2 . 0 | ran: 17 . 13 | per: 46 . 40
out: 28 . 27. 32 | flu: 0 . 0 | ran: 9 . 13 | per: 37 . 40
out: 29 . 27. 32 | flu: 0 . 0 | ran: 18 . 13 | per: 47 . 40
out: 28 . 27. 32 | flu: 0 . 0 | ran: 9 . 13 | per: 37 . 40
average slice is the ideal 13 msecs and the period is picture-perfect 40
msecs. But the 'ran' field fluctuates around 13.33 msecs and there's no
mechanism in CFS to keep that from happening: it's a perfectly valid
solution that CFS finds.
to fix this we add a granularity/preemption rule that knows about
the "target latency", which makes tasks that run longer than the ideal
latency run a bit less. The simplest approach is to simply decrease the
preemption granularity when a task overruns its ideal latency. For this
we have to track how much the task executed since its last preemption.
( this adds a new field to task_struct, but we can eliminate that
overhead in 2.6.24 by putting all the scheduler timestamps into an
anonymous union. )
with this change in place, chew-max output is fluctuation-less all
around:
out: 28 . 27. 39 | flu: 0 . 2 | ran: 13 . 13 | per: 41 . 40
out: 28 . 27. 39 | flu: 0 . 2 | ran: 13 . 13 | per: 41 . 40
out: 28 . 27. 39 | flu: 0 . 2 | ran: 13 . 13 | per: 41 . 40
out: 28 . 27. 39 | flu: 0 . 2 | ran: 13 . 13 | per: 41 . 40
out: 28 . 27. 39 | flu: 0 . 1 | ran: 13 . 13 | per: 41 . 40
out: 28 . 27. 39 | flu: 0 . 1 | ran: 13 . 13 | per: 41 . 40
this patch has no impact on any fastpath or on any globally observable
scheduling property. (unless you have sharp enough eyes to see
millisecond-level ruckles in glxgears smoothness :-)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
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* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[NET]: Mark Paul Moore as maintainer of labelled networking.
[VLAN/BRIDGE]: Fix "skb_pull_rcsum - Fatal exception in interrupt"
[ISDN]: Get rid of some pointless allocation casts in common and bsd comp.
[NET]: Avoid pointless allocation casts in BSD compression module
[IRDA]: Do not do pointless kmalloc return value cast in KingSun driver
[NET]: Fix crash in dev_mc_sync()/dev_mc_unsync()
[PPPOL2TP]: Fix endianness annotations.
[IOAT]: ioatdma needs to to play nice in a multi-dma-client world
[SLIP]: trivial sparse warning fix
[EQL]: sparse warning fix
[NET]: is_power_of_2 in net/core/neighbour.c
[TCP]: Describe tcp_init_cwnd() thoroughly in a comment.
[NET]: Fix IP_ADD/DROP_MEMBERSHIP to handle only connectionless
[KBUILD]: Sanitize tc_ematch headers.
[IPSEC] AH4: Update IPv4 options handling to conform to RFC 4302.
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* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] Fix SLB initialization at boot time
[POWERPC] Fix undefined reference to device_power_up/resume
[POWERPC] cell: Update cell_defconfig for 2.6.23
[POWERPC] axonram: Do not delete gendisks queue in error path
[POWERPC] axonram: Module modification for latest firmware API changes
[POWERPC] cell: Support pinhole-reset on IBM cell blades
[POWERPC] spu_manage: Use newer physical-id attribute
[POWERPC] pasemi: Another IOMMU bugfix for 64K PAGE_SIZE
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{s,d}_{session,tunnel} in pppol2tp_addr are actually host-endian
everywhere. We might switch them to net-endian, of course, but
that structure is exposed to userland via getname...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The headers in tc_ematch are used by iproute2, so these headers should
be processed.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: cleanup, sched_granularity -> sched_min_granularity
sched: adaptive scheduler granularity
sched: fix CONFIG_SCHED_DEBUG dependency of lockdep sysctls
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due to adaptive granularity scheduling the role of sched_granularity
has changed to "minimum granularity", so rename the variable (and the
tunable) accordingly.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Instead of specifying the preemption granularity, specify the wanted
latency. By fixing the granlarity to a constany the wakeup latency
it a function of the number of running tasks on the rq.
Invert this relation.
sysctl_sched_granularity becomes a minimum for the dynamic granularity
computed from the new sysctl_sched_latency.
Then use this latency to do more intelligent granularity decisions: if
there are fewer tasks running then we can schedule coarser. This helps
performance while still always keeping the latency target.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* 'agp-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6:
agp: balance ioremap checks
agp: Add device id for P4M900 to via-agp module
efficeon-agp leaks 'struct agp_bridge_data' in error paths of agp_efficeon_probe()
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Signed-off-by: Dave Airlie <airlied@linux.ie>
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Current Linus tree fails to link on pmac32:
drivers/built-in.o: In function `pmac_wakeup_devices':
via-pmu.c:(.text+0x5bab4): undefined reference to `device_power_up'
via-pmu.c:(.text+0x5bb08): undefined reference to `device_resume'
drivers/built-in.o: In function `pmac_suspend_devices':
via-pmu.c:(.text+0x5c260): undefined reference to `device_power_down'
via-pmu.c:(.text+0x5c27c): undefined reference to `device_resume'
make[1]: *** [.tmp_vmlinux1] Error 1
changing CONFIG_PM > CONFIG_PM_SLEEP leads to:
drivers/built-in.o: In function `pmu_led_set':
via-pmu-led.c:(.text+0x5cdca): undefined reference to `pmu_sys_suspended'
via-pmu-led.c:(.text+0x5cdce): undefined reference to `pmu_sys_suspended'
drivers/built-in.o: In function `pmu_req_done':
via-pmu-led.c:(.text+0x5ce3e): undefined reference to `pmu_sys_suspended'
via-pmu-led.c:(.text+0x5ce42): undefined reference to `pmu_sys_suspended'
drivers/built-in.o: In function `adb_init':
(.init.text+0x4c5c): undefined reference to `pmu_register_sleep_notifier'
make[1]: *** [.tmp_vmlinux1] Error 1
So change even more places from PM to PM_SLEEP to allow linking.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: tweak the sched_runtime_limit tunable
sched: skip updating rq's next_balance under null SD
sched: fix broken SMT/MC optimizations
sched: accounting regression since rc1
sched: fix sysctl directory permissions
sched: sched_clock_idle_[sleep|wakeup]_event()
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Renumber AUDIT_TTY_[GS]ET to avoid a conflict with netlink message types
already used in the wild.
Signed-off-by: Miloslav Trmac <mitr@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6:
PCI: Run k8t_sound_hostbridge quirk only when needed
PCI: disable MSI on RX790
PCI: disable MSI on RD580
PCI: disable MSI on RS690
PCI: make pcie_get_readrq visible in pci.h
PCI: lets kill the 'PCI hidden behind bridge' message
pci/hotplug/cpqphp_ctrl.c: remove stale BKL use
PCI: Document pci_iomap()
PCI: quirk_e100_interrupt() called too early
PCI: Move prototypes for pci_bus_find_capability to include/linux/pci.h
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Signed-off-by: Luming Yu <luming.yu@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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On a four package system with HT - HT load balancing optimizations were
broken. For example, if two tasks end up running on two logical threads
of one of the packages, scheduler is not able to pull one of the tasks
to a completely idle package.
In this scenario, for nice-0 tasks, imbalance calculated by scheduler
will be 512 and find_busiest_queue() will return 0 (as each cpu's load
is 1024 > imbalance and has only one task running).
Similarly MC scheduler optimizations also get fixed with this patch.
[ mingo@elte.hu: restored fair balancing by increasing the fuzz and
adding it back to the power decision, without the /2
factor. ]
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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construct a more or less wall-clock time out of sched_clock(), by
using ACPI-idle's existing knowledge about how much time we spent
idling. This allows the rq clock to work around TSC-stops-in-C2,
TSC-gets-corrupted-in-C3 type of problems.
( Besides the scheduler's statistics this also benefits blktrace and
printk-timestamps as well. )
Furthermore, the precise before-C2/C3-sleep and after-C2/C3-wakeup
callbacks allow the scheduler to get out the most of the period where
the CPU has a reliable TSC. This results in slightly more precise
task statistics.
the ACPI bits were acked by Len.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Len Brown <len.brown@intel.com>
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The NUMA layer only supports NUMA policies for the highest zone. When
ZONE_MOVABLE is configured with kernelcore=, the the highest zone becomes
ZONE_MOVABLE. The result is that policies are only applied to allocations
like anonymous pages and page cache allocated from ZONE_MOVABLE when the
zone is used.
This patch applies policies to the two highest zones when the highest zone
is ZONE_MOVABLE. As ZONE_MOVABLE consists of pages from the highest "real"
zone, it's always functionally equivalent.
The patch has been tested on a variety of machines both NUMA and non-NUMA
covering x86, x86_64 and ppc64. No abnormal results were seen in
kernbench, tbench, dbench or hackbench. It passes regression tests from
the numactl package with and without kernelcore= once numactl tests are
patched to wait for vmstat counters to update.
akpm: this is the nasty hack to fix NUMA mempolicies in the presence of
ZONE_MOVABLE and kernelcore= in 2.6.23. Christoph says "For .24 either merge
the mobility or get the other solution that Mel is working on. That solution
would only use a single zonelist per node and filter on the fly. That may
help performance and also help to make memory policies work better."
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Tested-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In file included from drivers/video/console/newport_con.c:16:
include/linux/selection.h:16: warning: "struct tty_struct" declared inside parameter list
include/linux/selection.h:16: warning: its scope is only this definition or declaration, which is probably not what you want
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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m68k/mac: Make mac_hid_mouse_emulate_buttons() declaration visible
drivers/char/keyboard.c: In function 'kbd_keycode':
drivers/char/keyboard.c:1142: error: implicit declaration of function 'mac_hid_mouse_emulate_buttons'
The forward declaration of mac_hid_mouse_emulate_buttons() is not visible on
m68k because it's hidden in the middle of a big #ifdef block.
Move it to <linux/kbd_kern.h>, correct the type of the second parameter, and
include <linux/kbd_kern.h> where needed.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The new exec code inserts an accounted vma into an mm struct which is not
current->mm. The existing memory check code has a hard coded assumption
that this does not happen as does the security code.
As the correct mm is known we pass the mm to the security method and the
helper function. A new security test is added for the case where we need
to pass the mm and the existing one is modified to pass current->mm to
avoid the need to change large amounts of code.
(Thanks to Tobias for fixing rejects and testing)
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: WU Fengguang <wfg@mail.ustc.edu.cn>
Cc: James Morris <jmorris@redhat.com>
Cc: Tobias Diedrich <ranma+kernel@tdiedrich.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Reading the LSR clears the break, parity, frame error, and overrun bits in
the 8250 chip, but these are not being saved in all places that read the
LSR. Same goes for the MSR delta bits. Save the LSR bits off whenever the
lsr is read so they can be handled later in the receive routine. Save the
MSR bits to be handled in the modem status routine.
Also, clear the stored bits and clear the interrupt registers before
enabling interrupts, to avoid handling old values of the stored bits in the
interrupt routines.
[akpm@linux-foundation.org: clean up pre-existing code]
Signed-off-by: Corey Minyard <minyard@acm.org>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Yinghai Lu <yinghai.lu@sun.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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RX790 can't do MSI like its predecessors. Disable MSI on RX790.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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RD580 can't do MSI like its predecessors. Disable MSI on RD580.
Signed-off-by: Tejun Heo <teheo@suse.de>
CC: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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RS690 can't do MSI like its predecessors. Disable MSI on RS690.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Henry Su <henry.su@amd.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[PATCH] PCI: make pcie_get_readrq visible in pci.h
pcie_get_readrq() is EXPORT_SYMBOL'ed, but its prototype is not
visible in pci.h, add it there.
This is needed by some network drivers.
Signed-off-by: Brice Goglin <brice@myri.com>
Acked-by: Peter Oruba <peter.oruba@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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We need pci_bus_find_capability() in some arch/powerpc code so move
the prototype into a header accessible to it.
Also kill the duplicate prototype for pci_bus_alloc_resource().
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The initial user manuals for MPC8544/8533 had some issues with properly
documenting the device IDs for MPC8544/8533. These processors are almost
identical and both show up on the reference boards.
Fix up the quirks for PCIe support to handle MPC8533/E.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
ide-disk: workaround for buggy HPA support on ST340823A (take 3)
hpt34x: fix CONFIG_HPT34X_AUTODMA=n handling
triflex: add missing ->dma_base check
pdc202xx_old: add missing ->dma_base check
pdc202xx_new: add missing ->dma_base check
cs5530: add missing ->dma_base check
ide: ide_config_drive_speed() bugfixes
ide: add cable detection for early UDMA66 devices (take 3)
ide-pmac: fix drive->init_speed reporting
ide: config_drive_for_dma() fixes
ide-cris: fix ->set_pio_mode method to set transfer mode on the device
ide: fix hidden dependencies on CONFIG_IDE_GENERIC
ide: make CONFIG_IDE_GENERIC default to N
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* Move ide_in_drive_list() from ide-dma.c to ide-iops.c.
* Add ivb_list[] table for listening early UDMA66 devices which don't conform
to ATA4 standard wrt cable detection (bit14 is zero, only bit13 is valid)
and use only device side cable detection for them since host side cable
detection may be unreliable.
* Add model "QUANTUM FIREBALLlct10 05" with firwmare "A03.0900" to the list
(from Craig's bugreport).
v2:
* Improve kernel message basing on suggestion from Sergei.
v3:
* Don't print kernel message when no device side cable detection is done,
plus some minor fixes. (Noticed by Sergei)
Thanks to Craig for testing this patch.
Cc: Craig Block <chblock3@yahoo.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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* Add DMA blacklist checking (->ide_dma_on check probably can go now).
* Add ->atapi_dma flag checking and remove no longer needed
ns87415_ide_dma_check() from ns87415 host driver.
* Remove now needless __ide_dma_check() wrapper and symbol export.
* Check drive->autodma instead of hwif->autodma (there should be no changes in
behavior as all users of config_drive_for_dma() set both ->autodma flags).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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There is no need for a global inverted alpha capability since all the
application has to do is to pass '255-alpha' as the global alpha value.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
Cross-compilation between e.g. i386 -> 64bit could break -> work around it
[IA64] Enable early console for Ski simulator
[IA64] forbid ptrace changes psr.ri to 3
[IA64] Failure to grow RBS
[IA64] Fix processor_get_freq
[IA64] SGI Altix : fix a force_interrupt bug on altix
[IA64] Update arch/ia64/configs/* s/SLAB/SLUB/
[IA64] get back PT_IA_64_UNWIND program header
[IA64] need NOTES in vmlinux.lds.S
[IA64] make unwinder stop at last frame of the bootloader
[IA64] Clean up CPE handler registration
[IA64] Include Kconfig.preempt
[IA64] SN2 needs platform specific irq_to_vector() function.
[IA64] Use atomic64_read to read an atomic64_t.
[IA64] disable irq's and check need_resched before safe_halt
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Adrian Bunk: scripts/mod/file2alias.c is compiled with HOSTCC and ensures that
kernel_ulong_t is correct, but it can't cope with different padding on
different architectures.
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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http://bugzilla.kernel.org/show_bug.cgi?id=8797 shows that the
bonding driver may produce bogus combinations of the checksum
flags and SG/TSO.
For example, if you bond devices with NETIF_F_HW_CSUM and
NETIF_F_IP_CSUM you'll end up with a bonding device that
has neither flag set. If both have TSO then this produces
an illegal combination.
The bridge device on the other hand has the correct code to
deal with this.
In fact, the same code can be used for both. So this patch
moves that logic into net/core/dev.c and uses it for both
bonding and bridging.
In the process I've made small adjustments such as only
setting GSO_ROBUST if at least one constituent device
supports it.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch makes the following needlessly global code static:
- arch_reinit_sched_domains()
- struct attr_sched_mc_power_savings
- struct attr_sched_smt_power_savings
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
BLOCK: Hide the contents of linux/bio.h if CONFIG_BLOCK=n
sysace: HDIO_GETGEO has it's own method for ages
drivers/block/cpqarray.c: better error handling and kmalloc + memset conversion to k[cz]alloc
drivers/block/cciss.c: kmalloc + memset conversion to kzalloc
Clean up duplicate includes in drivers/block/
Fix remap handling by blktrace
[PATCH] remove mm/filemap.c:file_send_actor()
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gcc currently doesn't support attributes on types, so we can't use it
function pointers. This avoids some warnings on a gcc 4.3 build.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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I find a function(clockevents_unregister_notifier) which is not called by
anything in tree.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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synchronize_idle() sounds like an interesting function, but we don't
actually have it, so don't prototype it. Introduced in commit
9b06e818985d139fd9e82c28297f7744e1b484e1, in 2005.
Signed-off-by: Josh Triplett <josh@kernel.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add missing "const" qualifiers to the print_hex_dump_bytes() library routines.
(akpm: rumoured to fix some compile warning somewhere)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Patch c5c34d4862e18ef07c1276d233507f540fb5a532 (tty: flush flip buffer on
ldisc input queue flush) introduces a race condition which can lead to memory
leaks.
The problem can be triggered when tcflush() is called when data are being
pushed to the line discipline driver by flush_to_ldisc().
flush_to_ldisc() releases tty->buf.lock when calling the line discipline
receive_buf function. At that poing tty_buffer_flush() kicks in and sets both
tty->buf.head and tty->buf.tail to NULL. When flush_to_ldisc() finishes, it
restores tty->buf.head but doesn't touch tty->buf.tail. This corrups the
buffer queue, and the next call to tty_buffer_request_room() will allocate a
new buffer and overwrite tty->buf.head. The previous buffer is then lost
forever without being released.
(Thanks to Laurent for the above text, for finding, disgnosing and reporting
the bug)
- Use tty->flags bits for the flush status.
- Wait for the flag to clear again before returning
- Fix the doc error noted
- Fix flush of empty queue leaving stale flushpending
[akpm@linux-foundation.org: cleanup]
Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Paul Fulghum <paulkf@microgate.com>
Cc: Laurent Pinchart <laurentp@cse-semaphore.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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After /proc/sys rewrite it was left unused.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Hide the contents of linux/bio.h if CONFIG_BLOCK=n as there shouldn't be
compiled code that uses it.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Rafael J. Wysocki
Tejun Heo
Christoph Lameter
Bartlomiej Zolnierkiewicz
David S. Miller
Ingo Molnar
Linus Torvalds
Al Viro
Stephen Hemminger
Peter Zijlstra
Xavier Bachelot
Olaf Hering
Len Brown
Miloslav Trmac
Yu Luming
Suresh Siddha
Mel Gorman
Andrew Morton
Geert Uytterhoeven
Alan Cox
Corey Minyard
Brice Goglin
Kumar Gala
Hans Verkuil
Thomas Renninger
Herbert Xu
Adrian Bunk
Andi Kleen
Miao Xie
Josh Triplett
Alan Stern
Alexey Dobriyan
David Howells