* 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
xen: handle events as edge-triggered
xen: use percpu interrupts for IPIs and VIRQs
* '2.6.36-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdev:
xfs: do not discard page cache data on EAGAIN
xfs: don't do memory allocation under the CIL context lock
xfs: Reduce log force overhead for delayed logging
xfs: dummy transactions should not dirty VFS state
xfs: ensure f_ffree returned by statfs() is non-negative
xfs: handle negative wbc->nr_to_write during sync writeback
writeback: write_cache_pages doesn't terminate at nr_to_write <= 0
xfs: fix untrusted inode number lookup
xfs: ensure we mark all inodes in a freed cluster XFS_ISTALE
xfs: unlock items before allowing the CIL to commit
No need to call input_free_device() after input_unregister_device().
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Introduced by 987a6c0298 a swap in max/min
calculation gets fixed by this patch.
Reported-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Huaxu and Rudolf want me to be the hwmon coretemp driver maintainer and
remove their names from the coretemp maintainer entry.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Huaxu Wan <huaxu.wan@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Commit 8bf0223ed515be24de0c671eedaff49e78bebc9c (hwmon, k8temp: Fix
temperature reporting for ASB1 processor revisions) fixed temperature
reporting for ASB1 CPUs. But those CPU models (model 0x6b, 0x6f, 0x7f)
were packaged both as AM2 (desktop) and ASB1 (mobile). Thus the commit
leads to wrong temperature reporting for AM2 CPU parts.
The solution is to determine the package type for models 0x6b, 0x6f,
0x7f.
This is done using BrandId from CPUID Fn8000_0001_EBX[15:0]. See
"Constructing the processor Name String" in "Revision Guide for AMD
NPT Family 0Fh Processors" (Rev. 3.46).
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: stable@kernel.org [.32.x, .33.x, .34.x, .35.x]
Reported-by: Vladislav Guberinic <neosisani@gmail.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Fix the following build warning:
CC [M] drivers/hwmon/coretemp.o
drivers/hwmon/coretemp.c: In function "coretemp_init":
drivers/hwmon/coretemp.c:521: warning: unused variable "n"
drivers/hwmon/coretemp.c:521: warning: unused variable "p"
Introduced by commit 851b29cb3b. When
you drop code, you also have to drop the variables this code was
using.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Chen Gong <gong.chen@linux.intel.com>
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Huaxu Wan <huaxu.wan@intel.com>
If on Pentium4 CPUs the FORCE_OVF flag is set then an NMI happens
on every event, which can generate a flood of NMIs. Clear it.
Reported-by: Vince Weaver <vweaver1@eecs.utk.edu>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
As reported by Anton Blanchard when we use
percpu_counter_read_positive() to make our orphan socket limit checks,
the check can be off by up to num_cpus_online() * batch (which is 32
by default) which on a 128 cpu machine can be as large as the default
orphan limit itself.
Fix this by doing the full expensive sum check if the optimized check
triggers.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
We used to use i_head_snapc to keep track of which snapc the current epoch
of dirty data was dirtied under. It is used by queue_cap_snap to set up
the cap_snap. However, since we queue cap snaps for any dirty caps, not
just for dirty file data, we need to keep a valid i_head_snapc anytime
we have dirty|flushing caps. This fixes a NULL pointer deref in
queue_cap_snap when writing back dirty caps without data (e.g.,
snaptest-authwb.sh).
Signed-off-by: Sage Weil <sage@newdream.net>
Casting "pep->tx_desc_dma" to to a struct tx_desc pointer makes gcc
complain:
drivers/net/pxa168_eth.c:657: warning:
cast to pointer from integer of different size
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The phy_mii_ioctl() function changed recently. It now takes a struct
ifreq pointer directly.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A couple issues here:
* Some resources weren't released.
* If alloc_etherdev() failed it would have caused a NULL dereference
because "pep" would be null when we checked "if (pep->clk)".
* Also it's better to propagate the error codes from mdiobus_register()
instead of just returning -ENOMEM.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
"pep->pd" isn't checked consistently in this function. For example it's
dereferenced unconditionally on the next line after the end of the if
condition. This function is only called from pxa168_eth_probe() and
pep->pd is always non-NULL so I removed the check.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It is possible that phylib will call adjust_link before returning
from {,of_}phy_connect(), which may cause the following [very rare,
though] oops upon reopening the device:
Unable to handle kernel paging request for data at address 0x0000024c
Oops: Kernel access of bad area, sig: 11 [#1]
PREEMPT SMP NR_CPUS=2 LTT NESTING LEVEL : 0
P1021 RDB
Modules linked in:
NIP: c0345dac LR: c0345dac CTR: c0345d84
TASK = dffab6b0[30] 'events/0' THREAD: c0d24000 CPU: 0
[...]
NIP [c0345dac] adjust_link+0x28/0x19c
LR [c0345dac] adjust_link+0x28/0x19c
Call Trace:
[c0d25f00] [000045e1] 0x45e1 (unreliable)
[c0d25f30] [c036c158] phy_state_machine+0x3ac/0x554
[...]
Here is why. Drivers store phydev in their private structures, e.g.
gianfar driver:
static int init_phy(struct net_device *dev)
{
...
priv->phydev = of_phy_connect(...);
...
}
So that adjust_link could retrieve it back:
static void adjust_link(struct net_device *dev)
{
...
struct phy_device *phydev = priv->phydev;
...
}
If the device has been opened before, then phydev->state is set to
PHY_HALTED (or undefined if the driver didn't call phy_stop()).
Now, phy_connect starts the PHY state machine before returning phydev to
the driver:
phy_start_machine(phydev, NULL);
if (phydev->irq > 0)
phy_start_interrupts(phydev);
return phydev;
The time between 'phy_start_machine()' and 'return phydev' is undefined.
The start machine routine delays execution for 1 second, which is enough
for most cases. But under heavy load, or if you're unlucky, it is quite
possible that PHY state machine will execute before phy_connect()
returns, and so adjust_link callback will try to dereference phydev,
which is not yet ready.
To fix the issue, simply initialize the PHY's state to PHY_READY during
phy_attach(). This will ensure that phylib won't call adjust_link before
phy_start().
Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix this error on an s390 allyesconfig build:
linux-2.6/drivers/net/caif/caif_spi.c:98:
undefined reference to `dma_free_coherent'
Cc: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pa-risc and ia64 have stacks that grow upwards. Check that
they do not run into other mappings. By making VM_GROWSUP
0x0 on architectures that do not ever use it, we can avoid
some unpleasant #ifdefs in check_stack_guard_page().
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When converting this to the new wait_for macro I inverted the wait
condition, which causes all sorts of problems. So correct it to fix
several failures caused by the bad wait (flickering, bad output
detection, tearing, etc.).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
sparse spotted that the kzalloc() in pm_qos_power_open() in the
current Linus' git tree had its parameters swapped. Fix this.
Signed-off-by: David Alan Gilbert <linux@treblig.org>
Acked-by: mark gross <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Xen events are logically edge triggered, as Xen only calls the event
upcall when an event is newly set, but not continuously as it remains set.
As a result, use handle_edge_irq rather than handle_level_irq.
This has the important side-effect of fixing a long-standing bug of
events getting lost if:
- an event's interrupt handler is running
- the event is migrated to a different vcpu
- the event is re-triggered
The most noticable symptom of these lost events is occasional lockups
of blkfront.
Many thanks to Tom Kopec and Daniel Stodden in tracking this down.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Tom Kopec <tek@acm.org>
Cc: Daniel Stodden <daniel.stodden@citrix.com>
Cc: Stable Kernel <stable@kernel.org>
IPIs and VIRQs are inherently per-cpu event types, so treat them as such:
- use a specific percpu irq_chip implementation, and
- handle them with handle_percpu_irq
This makes the path for delivering these interrupts more efficient
(no masking/unmasking, no locks), and it avoid problems with attempts
to migrate them.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>
Eliminiate sparse warning during usage of crypto_shash_* APIs
error: bad constant expression
Allocate memory for shash descriptors once, so that we do not kmalloc/kfree it
for every signature generation (shash descriptor for md5 hash).
From ed7538619817777decc44b5660b52268077b74f3 Mon Sep 17 00:00:00 2001
From: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Date: Tue, 24 Aug 2010 11:47:43 -0500
Subject: [PATCH] eliminate sparse warnings during crypto_shash_* APis usage
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
We should pass the data to the data register.
Signed-off-by: Jianwei Yang <jianwei.yang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It looks like there is an off-by-one error in one of your changes to
drivers/staging/rar_register/rar_register.c:
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This build bug triggers:
drivers/built-in.o: In function `mantis_exit':
(.text+0x377413): undefined reference to `ir_input_unregister'
drivers/built-in.o: In function `mantis_input_init':
(.text+0x3774ff): undefined reference to `__ir_input_register'
If MANTIS_CORE is enabled but IR_CORE is not. Add the correct
dependency.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc64: Get rid of indirect p1275 PROM call buffer.
sparc64: Fill a missing delay slot.
sparc64: Make lock backoff really a NOP on UP builds.
sparc64: simple microoptimizations for atomic functions
sparc64: Make rwsems 64-bit.
sparc64: Really fix atomic64_t interface types.
If netconsole is in use, there is a possibility for deadlock in 3c59x between
boomerang_interrupt and boomerang_start_xmit. Both routines take the vp->lock,
and if netconsole is in use, a pr_* call from the boomerang_interrupt routine
will result in the netconsole code attempting to trnasmit an skb, which can try
to take the same spin lock, resulting in deadlock.
The fix is pretty straightforward. This patch allocats a bit in the 3c59x
private structure to indicate that its handling an interrupt. If we get into
the transmit routine and that bit is set, we can be sure that we have recursed
and will deadlock if we continue, so instead we just return NETDEV_TX_BUSY, so
the stack requeues the skb to try again later.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The tlb flushing code uses the mm_users field of the mm_struct to
decide if each page table entry needs to be flushed individually with
IPTE or if a global flush for the mm_struct is sufficient after all page
table updates have been done. The comment for mm_users says "How many
users with user space?" but the /proc code increases mm_users after it
found the process structure by pid without creating a new user process.
Which makes mm_users useless for the decision between the two tlb
flusing methods. The current code can be confused to not flush tlb
entries by a concurrent access to /proc files if e.g. a fork is in
progres. The solution for this problem is to make the tlb flushing
logic independent from the mm_users field.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (25 commits)
powerpc: Fix config dependency problem with MPIC_U3_HT_IRQS
via-pmu: Add compat_pmu_ioctl
powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls
powerpc/pci: Fix checking for child bridges in PCI code.
powerpc: Fix typo in uImage target
powerpc: Initialise paca->kstack before early_setup_secondary
powerpc: Fix bogus it_blocksize in VIO iommu code
powerpc: Inline ppc64_runlatch_off
powerpc: Correct smt_enabled=X boot option for > 2 threads per core
powerpc: Silence xics_migrate_irqs_away() during cpu offline
powerpc: Silence __cpu_up() under normal operation
powerpc: Re-enable preemption before cpu_die()
powerpc/pci: Drop unnecessary null test
powerpc/powermac: Drop unnecessary null test
powerpc/powermac: Drop unnecessary of_node_put
powerpc/kdump: Stop all other CPUs before running crash handlers
powerpc/mm: Fix vsid_scrample typo
powerpc: Use is_32bit_task() helper to test 32 bit binary
powerpc: Export memstart_addr and kernstart_addr on ppc64
powerpc: Make rwsem use "long" type
...
fix this build error:
arch/s390/kernel/process.c:272: error: conflicting types for 'sys_execve'
arch/s390/kernel/entry.h:45: error: previous declaration of 'sys_execve' was here
make[1]: *** [arch/s390/kernel/process.o] Error 1
make: *** [arch/s390/kernel] Error 2
introduced by d7627467b7
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
68328serial: check return value of copy_*_user() instead of access_ok()
synclink: add mutex_unlock() on error path
rocket: add a mutex_unlock()
ip2: return -EFAULT on copy_to_user errors
ip2: remove unneeded NULL check
serial: print early console device address in hex
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
kobject_uevent: fix typo in comments
firmware_class: fix typo in error path
kobject: Break the kobject namespace defs into their own header
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (29 commits)
ARM: imx: fix build failure concerning otg/ulpi
USB: ftdi_sio: add product ID for Lenz LI-USB
USB: adutux: fix misuse of return value of copy_to_user()
USB: iowarrior: fix misuse of return value of copy_to_user()
USB: xHCI: update ring dequeue pointer when process missed tds
USB: xhci: Remove buggy assignment in next_trb()
USB: ftdi_sio: Add ID for Ionics PlugComputer
USB: serial: io_ti.c: don't return 0 if writing the download record failed
USB: otg: twl4030: fix wrong assumption of starting state
USB: gadget: Return -ENOMEM on memory allocation failure
USB: gadget: fix composite kernel-doc warnings
USB: ssu100: set tty_flags in ssu100_process_packet
USB: ssu100: add disconnect function for ssu100
USB: serial: export symbol usb_serial_generic_disconnect
USB: ssu100: rework logic for TIOCMIWAIT
USB: ssu100: add register parameter to ssu100_setregister
USB: ssu100: remove duplicate #defines in ssu100
USB: ssu100: refine process_packet in ssu100
USB: ssu100: add locking for port private data in ssu100
USB: r8a66597-udc: return -ENOMEM if kzalloc() fails
...
This is based upon a report by Meelis Roos showing that it's possible
that we'll try to fetch a property that is 32K in size with some
devices. With the current fixed 3K buffer we use for moving data in
and out of the firmware during PROM calls, that simply won't work.
In fact, it will scramble random kernel data during bootup.
The reasoning behind the temporary buffer is entirely historical. It
used to be the case that we had problems referencing dynamic kernel
memory (including the stack) early in the boot process before we
explicitly told the firwmare to switch us over to the kernel trap
table.
So what we did was always give the firmware buffers that were locked
into the main kernel image.
But we no longer have problems like that, so get rid of all of this
indirect bounce buffering.
Besides fixing Meelis's bug, this also makes the kernel data about 3K
smaller.
It was also discovered during these conversions that the
implementation of prom_retain() was completely wrong, so that was
fixed here as well. Currently that interface is not in use.
Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
MPIC_U3_HT_IRQS is selected both by PPC_PMAC64 and PPC_MAPLE, but depends
on PPC_MAPLE, so a PPC_PMAC64-only config gets this warning:
warning: (PPC_PMAC64 && PPC_PMAC && POWER4 || PPC_MAPLE && PPC64 && PPC_BOOK3S) selects MPIC_U3_HT_IRQS which has unmet direct dependencies (PPC_MAPLE)
Fix that by removing the dependency on PPC_MAPLE.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The ioctls are actually compatible, but due to historical mistake the
numbers differ between 32bit and 64bit.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
pci_device_to_OF_node() can return null, and list_for_each_entry will
never enter the loop when dev is NULL, so it looks like this test is
a typo.
Reported-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Commit e32e78c5ee
(powerpc: fix build with make 3.82) introduced a
typo in uImage target and broke building uImage:
make: *** No rule to make target `uImage'. Stop.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
As early setup calls down to slb_initialize(), we must have kstack
initialised before checking "should we add a bolted SLB entry for our kstack?"
Failing to do so means stack access requires an SLB miss exception to refill
an entry dynamically, if the stack isn't accessible via SLB(0) (kernel text
& static data). It's not always allowable to take such a miss, and
intermittent crashes will result.
Primary CPUs don't have this issue; an SLB entry is not bolted for their
stack anyway (as that lives within SLB(0)). This patch therefore only
affects the init of secondaries.
Signed-off-by: Matt Evans <matt@ozlabs.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When looking at some issues with the virtual ethernet driver I noticed
that TCE allocation was following a very strange pattern:
address 00e9000 length 2048
address 0409000 length 2048 <-----
address 0429000 length 2048
address 0449000 length 2048
address 0469000 length 2048
address 0489000 length 2048
address 04a9000 length 2048
address 04c9000 length 2048
address 04e9000 length 2048
address 4009000 length 2048 <-----
address 4029000 length 2048
Huge unexplained gaps in what should be an empty TCE table. It turns out
it_blocksize, the amount we want to align the next allocation to, was
c0000000fe903b20. Completely bogus.
Initialise it to something reasonable in the VIO IOMMU code, and use kzalloc
everywhere to protect against this when we next add a non compulsary
field to iommu code and forget to initialise it.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
I'm sick of seeing ppc64_runlatch_off in our profiles, so inline it
into the callers. To avoid a mess of circular includes I didn't add
it as an inline function.
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Linus Torvalds
Axel Lin
Christoph Fritz
Fenghua Yu
Andreas Herrmann
Jean Delvare
Lin Ming
Anton Blanchard
David S. Miller
Sage Weil
Dan Carpenter
Anton Vorontsov
Heiko Carstens
Luck, Tony
Jesse Barnes
David Alan Gilbert
Jeremy Fitzhardinge
shirishpargaonkar@gmail.com
Jianwei Yang
Ossama Othman
Ingo Molnar
Borislav Petkov
Neil Horman
Martin Schwidefsky
Sebastian Ott
Andreas Schwab
Grant Likely
Anatolij Gustschin
Matt Evans