sysfs: Add lockdep annotations for the sysfs active reference
Holding locks over device_del -> kobject_del -> sysfs_deactivate can
cause deadlocks if those same locks are grabbed in sysfs show or store
methods.
The I model s_active count + completion as a sleeping read/write lock.
I describe to lockdep sysfs_get_active as a read_trylock,
sysfs_put_active as a read_unlock, and sysfs_deactivate as a
write_lock and write_unlock pair. This seems to capture the essence
for purposes of finding deadlocks, and in my testing gives finds real
issues and ignores non-issues.
This brings us back to holding locks over kobject_del is a problem
that ideally we should find a way of addressing, but at least lockdep
can tell us about the problems instead of requiring developers to debug
rare strange system deadlocks, that happen when sysfs files are removed
while being written to.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 4 Jan 2010 20:32:42 +0000 (12:32 -0800)]
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] Update default configuration.
[S390] Have param.h simply include <asm-generic/param.h>.
[S390] qdio: convert global statistics to per-device stats
Linus Torvalds [Mon, 4 Jan 2010 20:28:26 +0000 (12:28 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
nilfs2: update mailing list address
nilfs2: Storage class should be before const qualifier
nilfs2: trivial coding style fix
[S390] Have param.h simply include <asm-generic/param.h>.
Since the files have identical content, might as well simplify.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Jan Glauber [Mon, 4 Jan 2010 08:05:42 +0000 (09:05 +0100)]
[S390] qdio: convert global statistics to per-device stats
Revamp the qdio performance statistics and move them from procfs to
debugfs using the seq_file interface. Since the statistics are not
intended for the general user the removal of /proc/qdio_perf should
not surprise anyone.
The per device statistics are disabled by default, writing 1 to
/<debugfs mountpoint>/qdio/<device bus ID>/statistics enables the
statistics for the given device.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Paul Mundt [Mon, 4 Jan 2010 02:16:33 +0000 (11:16 +0900)]
sh: Don't default enable PMB support.
This has the adverse effect of converting many 29bit configs to 32bit
mode, while this is a change that needs to be done manually for each
platform. Turn it off by default in order to cut down on spurious bug
reports.
Paul Mundt [Mon, 4 Jan 2010 02:13:54 +0000 (11:13 +0900)]
sh: Disable PMB for SH4AL-DSP CPUs.
While the PMB is available on SH-4A parts, SH4AL-DSP parts exclude it
altogether. As such, explicitly disable PMB support for these parts. If
this changes in the future for newer subtypes, this will have to be made
more fine-grained.
reiserfs: Fix unwanted recursive reiserfs lock in reiserfs_unlink()
reiserfs_unlink() may or may not be called under the reiserfs
lock.
But it also takes the reiserfs lock and can then acquire it
recursively which leads to do_journal_begin_r() that fails to
relax the reiserfs lock before grabbing the journal mutex,
creating an unexpected lock inversion.
We need to ensure reiserfs_unlink() won't get the reiserfs lock
recursively using reiserfs_write_lock_once().
This fixes the following warning that precedes a lock inversion
report (reiserfs lock <-> journal mutex).
reiserfs: Relax lock before open xattr dir in reiserfs_xattr_set_handle()
We call xattr_lookup() from reiserfs_xattr_get(). We then hold
the reiserfs lock when we grab the i_mutex. But later, we may
relax the reiserfs lock, creating dependency inversion between
both locks.
The lookups and creation jobs ar already protected by the
inode mutex, so we can safely relax the reiserfs lock, dropping
the unwanted reiserfs lock -> i_mutex dependency, as shown
in the following lockdep report:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.32-atom #173
-------------------------------------------------------
cp/3204 is trying to acquire lock:
(&REISERFS_SB(s)->lock){+.+.+.}, at: [<c11432b9>] reiserfs_write_lock_once+0x29/0x50
but task is already holding lock:
(&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c1141e18>] open_xa_dir+0xd8/0x1b0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
reiserfs: Relax reiserfs lock while freeing the journal
Keeping the reiserfs lock while freeing the journal on
umount path triggers a lock inversion between bdev->bd_mutex
and the reiserfs lock.
We don't need the reiserfs lock at this stage. The filesystem
is not usable anymore, and there are no more pending commits,
everything got flushed (even this operation was done in parallel
and didn't required the reiserfs lock from the current process).
This fixes the following lockdep report:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.32-atom #172
-------------------------------------------------------
umount/3904 is trying to acquire lock:
(&bdev->bd_mutex){+.+.+.}, at: [<c10de2c2>] __blkdev_put+0x22/0x160
but task is already holding lock:
(&REISERFS_SB(s)->lock){+.+.+.}, at: [<c1143279>] reiserfs_write_lock+0x29/0x40
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
reiserfs: Fix reiserfs lock <-> i_mutex dependency inversion on xattr
While deleting the xattrs of an inode, we hold the reiserfs lock
and grab the inode->i_mutex of the targeted inode and the root
private xattr directory.
Later on, we may relax the reiserfs lock for various reasons, this
creates inverted dependencies.
We can remove the reiserfs lock -> i_mutex dependency by relaxing
the former before calling open_xa_dir(). This is fine because the
lookup and creation of xattr private directories done in
open_xa_dir() are covered by the targeted inode mutexes. And deeper
operations in the tree are still done under the write lock.
This fixes the following lockdep report:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.32-atom #173
-------------------------------------------------------
cp/3204 is trying to acquire lock:
(&REISERFS_SB(s)->lock){+.+.+.}, at: [<c11432b9>] reiserfs_write_lock_once+0x29/0x50
but task is already holding lock:
(&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c1141e18>] open_xa_dir+0xd8/0x1b0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
When we relax the reiserfs lock to avoid creating unwanted
dependencies against others locks while grabbing these,
we want to ensure it has not been taken recursively, otherwise
the lock won't be really relaxed. Only its depth will be decreased.
The unwanted dependency would then actually happen.
To prevent from that, add a reiserfs_lock_check_recursive() call
in the places that need it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
i_xattr_sem depends on the reiserfs lock. But after we grab
i_xattr_sem, we may relax/relock the reiserfs lock while waiting
on a freezed filesystem, creating a dependency inversion between
the two locks.
In order to avoid the i_xattr_sem -> reiserfs lock dependency, let's
create a reiserfs_down_read_safe() that acts like
reiserfs_mutex_lock_safe(): relax the reiserfs lock while grabbing
another lock to avoid undesired dependencies induced by the
heivyweight reiserfs lock.
Theodore Ts'o [Fri, 1 Jan 2010 07:41:30 +0000 (02:41 -0500)]
ext4: Calculate metadata requirements more accurately
In the past, ext4_calc_metadata_amount(), and its sub-functions
ext4_ext_calc_metadata_amount() and ext4_indirect_calc_metadata_amount()
badly over-estimated the number of metadata blocks that might be
required for delayed allocation blocks. This didn't matter as much
when functions which managed the reserved metadata blocks were more
aggressive about dropping reserved metadata blocks as delayed
allocation blocks were written, but unfortunately they were too
aggressive. This was fixed in commit 0637c6f, but as a result the
over-estimation by ext4_calc_metadata_amount() would lead to reserving
2-3 times the number of pending delayed allocation blocks as
potentially required metadata blocks. So if there are 1 megabytes of
blocks which have been not yet been allocation, up to 3 megabytes of
space would get reserved out of the user's quota and from the file
system free space pool until all of the inode's data blocks have been
allocated.
This commit addresses this problem by much more accurately estimating
the number of metadata blocks that will be required. It will still
somewhat over-estimate the number of blocks needed, since it must make
a worst case estimate not knowing which physical blocks will be
needed, but it is much more accurate than before.
Linus Torvalds [Fri, 1 Jan 2010 01:26:05 +0000 (17:26 -0800)]
twl4030-irq.c: fix compiler warning due to raw-spinlock conversion
Commit 239007b844 ("genirq: Convert irq_desc.lock to raw_spinlock")
seems to have missed this driver, leaving it to use the normal spin-lock
functions for the irq descriptor lock, which is now a raw lock.
Reported-and-compile-tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 1 Jan 2010 00:44:43 +0000 (16:44 -0800)]
pci: avoid compiler warning in quirks.c
Introduced by commit 5b889bf23 ("PCI: Fix build if quirks are not
enabled"), which made the pci_dev_reset_methods[] array static and
'const', but didn't then change the code to match, and use a const
pointer when moving it to quirks.c.
Trivially fixed by just adding the required 'const' to the iterator
variable.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
[CIFS] Enable mmap on forcedirectio mounts
cifs: NULL out tcon, pSesInfo, and srvTcp pointers when chasing DFS referrals
Linus Torvalds [Thu, 31 Dec 2009 20:01:24 +0000 (12:01 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire, ieee1394: update Kconfig help
firewire, ieee1394: update MAINTAINERS entries
firewire: ohci: always use packet-per-buffer mode for isochronous reception
firewire: cdev: fix another memory leak in an error path
firewire: fix use of multiple AV/C devices, allow multiple FCP listeners
Comments from Stefan:
Distributors who still ship the old stack (ieee1394, ohci1394,
raw1394, sbp2, eth1394 and more) should now switch to the new one
(firewire-core, firewire-ohci, firewire-sbp2, firewire-net). In the
first iteration, those distributors might want to ship the old stack
also (but blacklisted) as a fallback for their users if unforeseen
problems with the newer replacement drivers are encountered.
The older FireWire stack contains several known problems which are
not going to be fixed; instead, those issues are addressed by the new
stack. An incomplete list of these issues is kept in bugzilla:
http://bugzilla.kernel.org/show_bug.cgi?id=10046
We have a guide on migration from the older to the newer stack:
Linus Torvalds [Thu, 31 Dec 2009 19:54:13 +0000 (11:54 -0800)]
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86/agp: Fix agp_amd64_init() initialization with CONFIG_GART_IOMMU enabled
x86: SGI UV: Fix writes to led registers on remote uv hubs
x86, kmemcheck: Use KERN_WARNING for error reporting
x86: Use KERN_DEFAULT log-level in __show_regs()
x86, compress: Force i386 instructions for the decompressor
x86/amd-iommu: Fix initialization failure panic
dma-debug: Do not add notifier when dma debugging is disabled.
x86: Fix objdump version check in chkobjdump.awk for different formats.
Trivial conflicts in arch/x86/include/asm/uv/uv_hub.h due to me having
applied an earlier version of an SGI UV fix.
Linus Torvalds [Thu, 31 Dec 2009 19:52:24 +0000 (11:52 -0800)]
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf kmem: Fix statistics typo
kprobes: Fix distinct type warning
perf: Rename perf_event_hw_event in design document
perf tools: Add missing header files to LIB_H Makefile variable
perf record: We should fork only if a program was specified to run
perf diff: Fix usage array, it must end with a NULL entry
Linus Torvalds [Thu, 31 Dec 2009 19:52:01 +0000 (11:52 -0800)]
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: Fix sign fields in ftrace_define_fields_##call()
tracing/syscalls: Fix typo in SYSCALL_DEFINE0
tracing/kprobe: Show sign of fields in trace_kprobe format files
ksym_tracer: Remove trace_stat
ksym_tracer: Fix race when incrementing count
ksym_tracer: Fix to allow writing newline to ksym_trace_filter
ksym_tracer: Fix to make the tracer work
tracing: Kconfig spelling fixes and cleanups
tracing: Fix setting tracer specific options
Documentation: Update ftrace-design.txt
Documentation: Update tracepoint-analysis.txt
Documentation: Update mmiotrace.txt
Linus Torvalds [Thu, 31 Dec 2009 19:12:35 +0000 (11:12 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: iforce - wait for command completion when closing the device
Input: twl4030-pwrbutton - switch to using threaded IRQ
Input: twl4030_keypad - switch to using threaded IRQ
Input: lifebook - add CONFIG_DMI dependency
Input: wistron - fix test for CONFIG_PM
Input: psmouse - fix compile warning in hgpk module
Input: matrix-keypad - handle cases when GPIOs can't be wakeup sources
Input: iforce - fix oops on device disconnect
Input: ff-memless - add notion of direction to for rumble effects
Input: ff-memless - another fix for signed to unsigned overflow
Input: ff-memless - start playing FF effects immediately
Input: serio - do not mark kseriod freezable anymore
Input: speed up suspend/shutdown for PS/2 mice and keyboards
Peter Zijlstra [Wed, 30 Dec 2009 15:00:35 +0000 (16:00 +0100)]
perf: Fix NULL deref in inheritance code
Liming found a NULL deref when a task has a perf context but no
counters when it forks.
This can occur in two cases, a race during construction where
the fork hits after installing the context but before the first
counter gets inserted, or more reproducably, a fork after the
last counter is closed (which leaves the context around).
Reported-by: Wang Liming <liming.wang@windriver.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> CC: <stable@kernel.org>
LKML-Reference: <1262185684.7135.222.camel@laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
perf: Pass appropriate frame pointer to dump_trace()
Pass the frame pointer from the regs of the interrupted path
to dump_trace() while processing the stack trace.
Currently, dump_trace() takes the current bp and starts the
callchain from dump_trace() itself. This is wasteful because
we need to walk through the entire NMI/DEBUG stack before
retrieving the interrupted point.
We can fix that by just using the frame pointer from the
captured regs. It points exactly where we want to start.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1262235183-5320-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
Linus Torvalds [Thu, 31 Dec 2009 00:00:24 +0000 (16:00 -0800)]
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI: introduce kernel parameter acpi_sleep=sci_force_enable
ACPI: WMI: Survive BIOS with duplicate GUIDs
dell-wmi - fix condition to abort driver loading
wmi: check find_guid() return value to prevent oops
dell-wmi, hp-wmi, msi-wmi: check wmi_get_event_data() return value
ACPI: hp-wmi, msi-wmi: clarify that wmi_install_notify_handler() returns an acpi_status
dell-wmi: sys_init_module: 'dell_wmi'->init suspiciously returned 21, it should
ACPI video: correct error-handling code
ACPI video: no warning message if "acpi_backlight=vendor" is used
ACPI: fix ACPI=n allmodconfig build
thinkpad-acpi: improve Kconfig help text
thinkpad-acpi: update volume subdriver documentation
thinkpad-acpi: make volume subdriver optional
thinkpad-acpi: don't fail to load the entire module due to ALSA problems
thinkpad-acpi: don't take the first ALSA slot by default
some laptop requires SCI_EN being set directly on resume,
or else they hung somewhere in the resume code path.
We already have a blacklist for these laptops but we still need
this option, especially when debugging some suspend/resume problems,
in case there are systems that need this workaround and are not yet
in the blacklist.
Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Linus Torvalds [Wed, 30 Dec 2009 21:46:29 +0000 (13:46 -0800)]
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
drivers/dma: Correct use after free
drivers/dma: drop unnecesary memset
ioat2,3: put channel hardware in known state at init
async_tx: expand async raid6 test to cover ioatdma corner case
ioat3: fix p-disabled q-continuation
sh: fix DMA driver's descriptor chaining and cookie assignment
dma: at_hdmac: correct incompatible type for argument 1 of 'spin_lock_bh'
Linus Torvalds [Wed, 30 Dec 2009 21:25:56 +0000 (13:25 -0800)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Patch up how we claim metadata blocks for quota purposes
ext4: Ensure zeroout blocks have no dirty metadata
ext4: return correct wbc.nr_to_write in ext4_da_writepages
ext4: Update documentation to correct the inode_readahead_blks option name
jbd2: don't use __GFP_NOFAIL in journal_init_common()
ext4: flush delalloc blocks when space is low
fs-writeback: Add helper function to start writeback if idle
ext4: Eliminate potential double free on error path
ext4: fix unsigned long long printk warning in super.c
ext4, jbd2: Add barriers for file systems with exernal journals
ext4: replace BUG() with return -EIO in ext4_ext_get_blocks
ext4: add module aliases for ext2 and ext3
ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured
ext4: remove unused #include <linux/version.h>
Linus Torvalds [Wed, 30 Dec 2009 21:13:24 +0000 (13:13 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI/cardbus: Add a fixup hook and fix powerpc
PCI: change PCI nomenclature in drivers/pci/ (non-comment changes)
PCI: change PCI nomenclature in drivers/pci/ (comment changes)
PCI: fix section mismatch on update_res()
PCI: add Intel 82599 Virtual Function specific reset method
PCI: add Intel USB specific reset method
PCI: support device-specific reset methods
PCI: Handle case when no pci device can provide cache line size hint
PCI/PM: Propagate wake-up enable for PCIe devices too
vgaarbiter: fix a typo in the vgaarbiter Documentation
Linus Torvalds [Wed, 30 Dec 2009 20:56:17 +0000 (12:56 -0800)]
Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: get rid of kvm_create_vm() unused label warning on s390
KVM: powerpc: Fix mtsrin in book3s_64 mmu
KVM: ia64: fix build breakage due to host spinlock change
KVM: x86: Extend KVM_SET_VCPU_EVENTS with selective updates
KVM: LAPIC: make sure IRR bitmap is scanned after vm load
KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device()
KVM: MMU: remove prefault from invlpg handler
Linus Torvalds [Wed, 30 Dec 2009 20:55:10 +0000 (12:55 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - Fix Oops at reloading beep devices
ALSA: hda - Don't cache beep controls
ALSA: Fix a typo in Procfile.txt
ALSA: sound/arm: Fix build failure caused by missing struct aaci definition
ALSA: hda - use snd_hda_jack_detect() again in patch_sigmatel.c
ALSA: hda - Disable tigger at pin-sensing on AD codecs
ALSA: hda - HDMI sticky stream tag support
ALSA: Fix indentation in pcm_native.c
Linus Torvalds [Wed, 30 Dec 2009 20:43:21 +0000 (12:43 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: blk_rq_err_sectors cleanup
block: Honor the gfp_mask for alloc_page() in blkdev_issue_discard()
block: Fix incorrect alignment offset reporting and update documentation
cfq-iosched: don't regard requests with long distance as close
aoe: switch to the new bio_flush_dcache_pages() interface
drivers/block/mg_disk.c: use resource_size()
drivers/block/DAC960.c: use DAC960_V2_Controller
block: Fix topology stacking for data and discard alignment
drbd: remove unused #include <linux/version.h>
drbd: remove duplicated #include
drbd: Fix test of unsigned in _drbd_fault_random()
drbd: Constify struct file_operations
cfq-iosched: Remove prio_change logic for workload selection
cfq-iosched: Get rid of nr_groups
cfq-iosched: Remove the check for same cfq group from allow_merge
drbd: fix test of unsigned in _drbd_fault_random()
block: remove Documentation/block/as-iosched.txt
Linus Torvalds [Wed, 30 Dec 2009 20:39:19 +0000 (12:39 -0800)]
Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md:
md: allow a resync that is waiting for other resync to complete, to be aborted.
md: remove unnecessary code from do_md_run
md: make recovery started by do_md_run() visible via sync_action
md: fix small irregularity with start_ro module parameter
md: Fix unfortunate interaction with evms
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (74 commits)
Revert "b43: Enforce DMA descriptor memory constraints"
iwmc3200wifi: fix array out-of-boundary access
wl1251: timeout one too soon in wl1251_boot_run_firmware()
mac80211: fix propagation of failed hardware reconfigurations
mac80211: fix race with suspend and dynamic_ps_disable_work
ath9k: fix missed error codes in the tx status check
ath9k: wake hardware during AMPDU TX actions
ath9k: wake hardware for interface IBSS/AP/Mesh removal
ath9k: fix suspend by waking device prior to stop
cfg80211: fix error path in cfg80211_wext_siwscan
wl1271_cmd.c: cleanup char => u8
iwlwifi: Storage class should be before const qualifier
ath9k: Storage class should be before const qualifier
cfg80211: fix race between deauth and assoc response
wireless: remove remaining qual code
rt2x00: Add USB ID for Linksys WUSB 600N rev 2.
ath5k: fix SWI calibration interrupt storm
mac80211: fix ibss join with fixed-bssid
libertas: Remove carrier signaling from the scan code
orinoco: fix GFP_KERNEL in orinoco_set_key with interrupts disabled
...
Serge E. Hallyn [Tue, 29 Dec 2009 20:50:19 +0000 (14:50 -0600)]
generic_permission: MAY_OPEN is not write access
generic_permission was refusing CAP_DAC_READ_SEARCH-enabled
processes from opening DAC-protected files read-only, because
do_filp_open adds MAY_OPEN to the open mask.
Ignore MAY_OPEN. After this patch, CAP_DAC_READ_SEARCH is
again sufficient to open(fname, O_RDONLY) on a file to which
DAC otherwise refuses us read permission.
Reported-by: Mike Kazantsev <mk.fraggod@gmail.com> Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Tested-by: Mike Kazantsev <mk.fraggod@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mike Travis [Mon, 28 Dec 2009 21:28:25 +0000 (13:28 -0800)]
x86_64 SGI UV: Fix writes to led registers on remote uv hubs.
The wrong address was being used to write the SCIR led regs on remote
hubs. Also, there was an inconsistency between how BIOS and the kernel
indexed these regs. Standardize on using the lower 6 bits of the APIC
ID as the index.
This patch fixes the problem of writing to an errant address to a
cpu # >= 64.
Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Jack Steiner <steiner@sgi.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Wed, 30 Dec 2009 20:17:34 +0000 (20:17 +0000)]
mm: move sys_mmap_pgoff from util.c
Move sys_mmap_pgoff() from mm/util.c to mm/mmap.c and mm/nommu.c,
where we'd expect to find such code: especially now that it contains
the MAP_HUGETLB handling. Revert mm/util.c to how it was in 2.6.32.
This patch just ignores MAP_HUGETLB in the nommu case, as in 2.6.32,
whereas 2.6.33-rc2 reported -ENOSYS. Perhaps validate_mmap_request()
should reject it with -EINVAL? Add that later if necessary.
James Bottomley [Wed, 30 Dec 2009 19:21:06 +0000 (13:21 -0600)]
libsrp: fix compile failure
commit 45465487897a1c6d508b14b904dc5777f7ec7e04 ("kfifo: move struct
kfifo in place") caused a compile failure in ibmvscsitgt.c because it
changed a pointer to kfifo in the libsrp.h structure to a direct
inclusion without including <linux/kfifo.h>.
The fix is simple, just add the include, but how did this happen? This
change, introduced at -rc2, hardly looks like a bug fix, and it clearly
didn't go through linux-next, which would have picked up this compile
failure (it only occurs on ppc because of the ibm virtual scsi target).
[ Apparently all of -mm wasn't in linux-next.. ]
Signed-off-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Theodore Ts'o [Wed, 30 Dec 2009 19:20:45 +0000 (14:20 -0500)]
ext4: Patch up how we claim metadata blocks for quota purposes
As reported in Kernel Bugzilla #14936, commit d21cd8f triggered a BUG
in the function ext4_da_update_reserve_space() found in
fs/ext4/inode.c. The root cause of this BUG() was caused by the fact
that ext4_calc_metadata_amount() can severely over-estimate how many
metadata blocks will be needed, especially when using direct
block-mapped files.
In addition, it can also badly *under* estimate how much space is
needed, since ext4_calc_metadata_amount() assumes that the blocks are
contiguous, and this is not always true. If the application is
writing blocks to a sparse file, the number of metadata blocks
necessary can be severly underestimated by the functions
ext4_da_reserve_space(), ext4_da_update_reserve_space() and
ext4_da_release_space(). This was the cause of the dq_claim_space
reports found on kerneloops.org.
Unfortunately, doing this right means that we need to massively
over-estimate the amount of free space needed. So in some cases we
may need to force the inode to be written to disk asynchronously in
to avoid spurious quota failures.
Lai Jiangshan [Tue, 15 Dec 2009 07:39:38 +0000 (15:39 +0800)]
tracing: Fix sign fields in ftrace_define_fields_##call()
Add is_signed_type() call to trace_define_field() in ftrace macros.
The code previously just passed in 0 (false), disregarding whether
or not the field was actually a signed type.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D3A.6020007@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Lai Jiangshan [Tue, 15 Dec 2009 07:39:26 +0000 (15:39 +0800)]
tracing/syscalls: Fix typo in SYSCALL_DEFINE0
The struct syscall_metadata variable name in SYSCALL_DEFINE0
should be __syscall_meta__##sname instead of __syscall_meta_##sname
to match the name that is in SYSCALL_DEFINE1/2/3/4/5/6.
This error causes event_enter_##sname->data to point to the wrong
location, which causes syscalls which are defined by SYSCALL_DEFINE0()
not to be traced.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D2E.1010807@cn.fujitsu.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Lai Jiangshan [Tue, 15 Dec 2009 07:39:19 +0000 (15:39 +0800)]
tracing/kprobe: Show sign of fields in trace_kprobe format files
The format files of trace_kprobe do not show the sign of the fields.
The other format files show the field signed type of the fields and
this patch makes the trace_kprobe formats consistent with the others.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D27.5040009@cn.fujitsu.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
agp_amd64_init() was called via gart_iommu_init with
CONFIG_GART_IOMMU=y agp_amd64_init() was called via module_init
with CONFIG_GART_IOMMU=n
The commit 75f1cdf1dda92cae037ec848ae63690d91913eac changes the
x86 dma initialization routine: gart_iommu_init() is called only
when GART IOMMU is detected. So when GART IOMMU isn't detected,
agp_amd64_init isn't called.
With this patch, agp_amd64_init() is always called via
module_init (the above ifndef is removed). If agp_amd64_init()
is called via gart_iommu_init() earlier, agp_amd64_init()
finishes without doing anything (when it is called via
module_init).
Carlos Corbacho [Sat, 26 Dec 2009 19:14:59 +0000 (19:14 +0000)]
ACPI: WMI: Survive BIOS with duplicate GUIDs
It would appear that in BIOS's with nVidia hooks, the GUID 05901221-D566-11D1-B2F0-00A0C9062910 is duplicated. For now, the simplest
solution is to just ignore any duplicate GUIDs. These particular hooks are not
currently supported/ used in the kernel, so whoever does that can figure out
what the 'right' solution should be (if there's a better one).
http://bugzilla.kernel.org/show_bug.cgi?id=14846
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Reported-by: Larry Finger <Larry.Finger@lwfinger.net> Reported-by: Oldřich Jedlička <oldium.pro@seznam.cz> Signed-off-by: Len Brown <len.brown@intel.com>
Dmitry Torokhov [Fri, 25 Dec 2009 19:49:35 +0000 (11:49 -0800)]
dell-wmi - fix condition to abort driver loading
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The commit 1fdd407f4e3f2ecb453954cbebb6c22491c61853 incorrectly made driver
abort loading when known GUID is present when it should have done exactly
the opposite.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Len Brown <len.brown@intel.com>
Ingo Molnar [Thu, 17 Dec 2009 07:50:25 +0000 (08:50 +0100)]
ACPI: fix ACPI=n allmodconfig build
Today's -tip failed to build because commit 9e368fa011d4e0aa050db348d69514900520e40b ("ipmi: add PNP discovery (ACPI
namespace via PNPACPI)") from today's upstream kernel causes the following
build failure on x86, for CONFIG_ACPI=n && CONFIG_IPMI_SI=y:
drivers/char/ipmi/ipmi_si_intf.c:3208: error: 'ipmi_pnp_driver' undeclared (first use in this function)
drivers/char/ipmi/ipmi_si_intf.c:3208: error: (Each undeclared identifier is reported only once
drivers/char/ipmi/ipmi_si_intf.c:3208: error: for each function it appears in.)
drivers/char/ipmi/ipmi_si_intf.c:3334: error: 'ipmi_pnp_driver' undeclared (first use in this function)
The reason is that the ipmi_pnp_driver depends on ACPI facilities and is only
made available under ACPI - while the registration and unregistration is made
dependent on CONFIG_PNP:
The solution is to only register this driver under ACPI. (Also, the CONFIG_PNP
dependency is not needed because pnp_register_driver() is stubbed out in the
!CONFIG_PNP case.)
Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Myron Stowe <myron.stowe@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
ext4: Ensure zeroout blocks have no dirty metadata
This fixes a bug (found by Curt Wohlgemuth) in which new blocks
returned from an extent created with ext4_ext_zeroout() can have dirty
metadata still associated with them.
projects / mirror_ubuntu-kernels.git / log