On most architectures division is an expensive operation and accessing an
element currently requires four of them. This performance penalty
effectively precludes flex arrays from being used on any kind of fast
path. However, two of these divisions can be handled at creation time and
the others can be replaced by a reciprocal divide, completely avoiding
real divisions on access.
[eparis@redhat.com: rebase on top of changes to support 0 len elements]
[eparis@redhat.com: initialize part_nr when array fits entirely in base]
Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
They have no meaning.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We plan to remove cpus_xx() old cpumask APIs later. Also, we plan to
change mm_cpu_mask() implementation, allocate only nr_cpu_ids, thus
*mm_cpu_mask() is dangerous operation.
Then, this patch convert them.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
alpha allmodconfig:
drivers/bcma/host_pci.c: In function 'bcma_host_pci_probe':
drivers/bcma/host_pci.c:102: error: implicit declaration of function 'kzalloc'
drivers/bcma/host_pci.c:102: warning: assignment makes pointer from integer without a cast
Cc: <zajec5@gmail.com>
Cc: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
alpha allmodconfig:
drivers/video/mb862xx/mb862xxfbdrv.c: In function 'mb862xxfb_ioctl':
drivers/video/mb862xx/mb862xxfbdrv.c:323: error: implicit declaration of function 'copy_to_user'
drivers/video/mb862xx/mb862xxfbdrv.c:327: error: implicit declaration of function 'copy_from_user'
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For certain system configurations a 5 usec udelay before checking I/OAT DMA
channel status is sometimes not sufficient, resulting in a false failure
status and unnecessary freeing of channel resources. Conversely, for many
configurations 5 usec is longer than necessary.
Loop for up to 20 usec waiting for successful status before failing.
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Move the Samsung s5pc100 SoC GPIO driver to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Move the Samsung s5pv210 SoC GPIO driver to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Move the Samsung Exynos4 series SoCs GPIO driver to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
It's common gpiolib for recent Samsung SoCs. Move to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Useful to check the status of the runtime pin muxing.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
[Squashed, modified to use chip-internal IRQ trigger state]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This moves the Nomadik GPIO driver out of arch/arm/plat-nomadik
and into the desired location indicated by the subsystem
maintainer.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[grant.likely: squashed with kconfig fixup]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This moves the U300 GPIO driver out of arch/arm/mach-u300 and into
the desired location indicated by the subsystem maintainer.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This adds the PCI ID for the xHCI (USB 3.0) host controller in the Intel
Panther Point chipset. It will be used by both the EHCI and xHCI driver
in the following patches.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Make pm_qos_power_write() accept values passed to it in the ASCII hex
format either with or without an ending newline.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Mark Gross <markgross@thegnar.org>
For a filesystem that has lots of files in it, the first time we mount
it with free ino caching support, it can take quite a long time to
setup the caching before we can create new files.
Here we fill the cache with [highest_ino, BTRFS_LAST_FREE_OBJECTID]
before we start the caching thread to search through the extent tree.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
scrub_page collects several pages into one bio as long as they are physically
contiguous. As we only save one logical address for the whole bio, don't
collect pages that are physically contiguous but logically discontiguous.
Signed-off-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This will detect small random writes into files and
queue the up for an auto defrag process. It isn't well suited to
database workloads yet, but works for smaller files such as rpm, sqlite
or bdb databases.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Since this cred was not created with copy_creds(), it needs to get
initialized. Otherwise use of syscall(__NR_keyctl, KEYCTL_SESSION_TO_PARENT);
can lead to a NULL deref. Thanks to Robert for finding this.
But introduced by commit 47a150edc2 ("Cache user_ns in struct cred").
Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Reported-by: Robert Święcki <robert@swiecki.net>
Cc: David Howells <dhowells@redhat.com>
Cc: stable@kernel.org (2.6.39)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
While this is essentially a no-op for this driver, it has the
side effect of letting the PMU driver snoop D3 requests from
the PCI core for this driver.
This is only for langwell, not for whitney point.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
gfs2: Drop __TIME__ usage
isdn/diva: Drop __TIME__ usage
atm: Drop __TIME__ usage
dlm: Drop __TIME__ usage
wan/pc300: Drop __TIME__ usage
parport: Drop __TIME__ usage
hdlcdrv: Drop __TIME__ usage
baycom: Drop __TIME__ usage
pmcraid: Drop __DATE__ usage
edac: Drop __DATE__ usage
rio: Drop __DATE__ usage
scsi/wd33c93: Drop __TIME__ usage
scsi/in2000: Drop __TIME__ usage
aacraid: Drop __TIME__ usage
media/cx231xx: Drop __TIME__ usage
media/radio-maxiradio: Drop __TIME__ usage
nozomi: Drop __TIME__ usage
cyclades: Drop __TIME__ usage
PCA957x is i2c gpio expander, and similar to PCA953x. Although register
configurations are different between PCA957x and PCA953x. They can share
a lot of components, such as IRQ handling, GPIO IN/OUT. So updating PCA953x
driver to support PCA957x chips.
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
cs5535-gpio.c has been split into two, with various setup moved
into cs5535-mfd.c. Given that cs5535-gpio will not load without
the -mfd part, lets make that dependency explicit in Kconfig
Signed-off-by: Ed Wildgoose <kernel@wildgooses.com>
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: vdso: Remove unused variable
x86-64: Optimize vDSO time()
x86-64: Add time to vDSO
x86-64: Turn off -pg and turn on -foptimize-sibling-calls for vDSO
x86-64: Move vread_tsc into a new file with sensible options
x86-64: Vclock_gettime(CLOCK_MONOTONIC) can't ever see nsec < 0
x86-64: Don't generate cmov in vread_tsc
x86-64: Remove unnecessary barrier in vread_tsc
x86-64: Clean up vdso/kernel shared variables
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
seqlock: Get rid of SEQLOCK_UNLOCKED
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
irq: Remove smp_affinity_list when unregister irq proc
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6:
gpio/via: rename VIA local config struct
basic_mmio_gpio: split into a gpio library and platform device
gpio: remove some legacy comments in build files
gpio: add trace events for setting direction and value
gpio/pca953x: Use handle_simple_irq instead of handle_edge_irq
gpiolib: export gpiochip_find
gpio: remove redundant Kconfig depends on GPIOLIB
basic_mmio_gpio: convert to non-__raw* accessors
basic_mmio_gpio: support direction registers
basic_mmio_gpio: support different input/output registers
basic_mmio_gpio: detect output method at probe time
basic_mmio_gpio: request register regions
basic_mmio_gpio: allow overriding number of gpio
basic_mmio_gpio: convert to platform_{get,set}_drvdata()
basic_mmio_gpio: remove runtime width/endianness evaluation
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (57 commits)
regulator: Fix 88pm8607.c printk format warning
input: Add support for Qualcomm PMIC8XXX power key
input: Add Qualcomm pm8xxx keypad controller driver
mfd: Add omap-usbhs runtime PM support
mfd: Fix ASIC3 SD Host Controller Configuration size
mfd: Fix omap_usbhs_alloc_children error handling
mfd: Fix omap usbhs crash when rmmoding ehci or ohci
mfd: Add ASIC3 LED support
leds: Add ASIC3 LED support
mfd: Update twl4030-code maintainer e-mail address
mfd: Correct the name and bitmask for ab8500-gpadc BTempPullUp
mfd: Add manual ab8500-gpadc batt temp activation for AB8500 3.0
mfd: Provide ab8500-core enumerators for chip cuts
mfd: Check twl4030-power remove script error condition after i2cwrite
mfd: Fix twl6030 irq definitions
mfd: Add phoenix lite (twl6025) support to twl6030
mfd: Avoid to use constraint name in 88pm860x regulator driver
mfd: Remove checking on max8925 regulator[0]
mfd: Remove unused parameter from 88pm860x API
mfd: Avoid to allocate 88pm860x static platform data
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
RDMA/cma: Save PID of ID's owner
RDMA/cma: Add support for netlink statistics export
RDMA/cma: Pass QP type into rdma_create_id()
RDMA: Update exported headers list
RDMA/cma: Export enum cma_state in <rdma/rdma_cm.h>
RDMA/nes: Add a check for strict_strtoul()
RDMA/cxgb3: Don't post zero-byte read if endpoint is going away
RDMA/cxgb4: Use completion objects for event blocking
IB/srp: Fix integer -> pointer cast warnings
IB: Add devnode methods to cm_class and umad_class
IB/mad: Return EPROTONOSUPPORT when an RDMA device lacks the QP required
IB/uverbs: Add devnode method to set path/mode
RDMA/ucma: Add .nodename/.mode to tell userspace where to create device node
RDMA: Add netlink infrastructure
RDMA: Add error handling to ib_core_init()
* 'spi/next' of git://git.secretlab.ca/git/linux-2.6:
spi/amba-pl022: work in polling or interrupt mode if pl022_dma_probe fails
spi/spi_s3c24xx: Use spi_bitbang_stop instead of spi_unregister_master in s3c24xx_spi_remove
spi/spi_nuc900: Use spi_bitbang_stop instead of spi_unregister_master in nuc900_spi_remove
spi/spi_tegra: use spi_unregister_master() instead of spi_master_put()
spi/spi_sh: use spi_unregister_master instead of spi_master_put in remove path
spi: Use void pointers for data in simple SPI I/O operations
spi/pl022: use cpu_relax in the busy loop
spi/pl022: mark driver non-experimental
spi/pl022: timeout on polled transfer v2
spi/dw_spi: improve the interrupt mode with the batch ops
spi/dw_spi: change poll mode transfer from byte ops to batch ops
spi/dw_spi: remove the un-necessary flush()
spi/dw_spi: unify the low level read/write routines
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (33 commits)
OMAP3: PM: Boot message is not an error, and not helpful, remove it
OMAP3: cpuidle: change the power domains modes determination logic
OMAP3: cpuidle: code rework for improved readability
OMAP3: cpuidle: re-organize the C-states data
OMAP3: clean-up mach specific cpuidle data structures
OMAP3 cpuidle: remove useless SDP specific timings
usb: otg: OMAP4430: Powerdown the internal PHY when USB is disabled
usb: otg: OMAP4430: Fixing the omap4430_phy_init function
usb: musb: am35x: fix compile error when building am35x
usb: musb: OMAP4430: Power down the PHY during board init
omap: drop board-igep0030.c
omap: igep0020: add support for IGEP3
omap: igep0020: minor refactoring
omap: igep0020: name refactoring for future merge with IGEP3
omap: Remove support for omap2evm
arm: omap2plus: GPIO cleanup
omap: musb: introduce default board config
omap: move detection of NAND CS to common-board-devices
omap: use common initialization for PMIC i2c bus
omap: consolidate touch screen initialization among different boards
...
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/4xx: Adding PCIe MSI support
powerpc: Fix irq_free_virt by adjusting bounds before loop
powerpc/irq: Protect irq_radix_revmap_lookup against irq_free_virt
powerpc/irq: Check desc in handle_one_irq and expand generic_handle_irq
powerpc/irq: Always free duplicate IRQ_LEGACY hosts
powerpc/irq: Remove stale and misleading comment
powerpc/cell: Rename ipi functions to match current abstractions
powerpc/cell: Use common smp ipi actions
Remove unused MSG_ flags in linux/smp.h
powerpc/pseries: Update MAX_HCALL_OPCODE to reflect page coalescing
powerpc/oprofile: Handle events that raise an exception without overflowing
powerpc/ftrace: Implement raw syscall tracepoints on PowerPC
9fd097b149 (block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe
drivers) removed DISK_EVENT_MEDIA_CHANGE from legacy/fringe block
drivers which have inadequate ->check_events(). Combined with earlier
change 7c88a168da (block: don't propagate unlisted DISK_EVENTs to
userland), this enables using ->check_events() for internal processing
while avoiding enabling in-kernel block event polling which can lead
to infinite event loop.
Unfortunately, this made many drivers including floppy without any bit
set in disk->events and ->async_events in which case disk_add_events()
simply skipped allocation of disk->ev, which disables whole event
handling. As ->check_events() is still used during open processing
for revalidation, this can lead to open failure.
This patch always allocates disk->ev if ->check_events is implemented.
In the long term, it would make sense to simply include the event
structure inline into genhd as it's now used by virtually all block
devices.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ondrej Zary <linux@rainbow-software.org>
Reported-by: Alex Villacis Lasso <avillaci@ceibo.fiec.espol.edu.ec>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Export 'rd_nr', 'rd_size' and 'max_part' parameters to sysfs so user can
know that how many devices are allowed, how big each device is and how
many partitions are supported. If 'max_part' is 0, it means simply the
device doesn't support partitioning.
Also note that 'max_part' can be adjusted to power of 2 minus 1 form if
needed. User should check this value after the module loading if he/she
want to use that number correctly (i.e. fdisk, mknod, etc.).
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
If 'rd_nr' param was not specified, 16 (can be adjusted via
CONFIG_BLK_DEV_RAM_COUNT) devices would be created by default
but comment said 1. Fix it.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
When finding or allocating a ram disk device, brd_probe() did not take
partition numbers into account so that it can result to a different
device. Consider following example (I set CONFIG_BLK_DEV_RAM_COUNT=4
for simplicity) :
$ sudo modprobe brd max_part=15
$ ls -l /dev/ram*
brw-rw---- 1 root disk 1, 0 2011-05-25 15:41 /dev/ram0
brw-rw---- 1 root disk 1, 16 2011-05-25 15:41 /dev/ram1
brw-rw---- 1 root disk 1, 32 2011-05-25 15:41 /dev/ram2
brw-rw---- 1 root disk 1, 48 2011-05-25 15:41 /dev/ram3
$ sudo mknod /dev/ram4 b 1 64
$ sudo dd if=/dev/zero of=/dev/ram4 bs=4k count=256
256+0 records in
256+0 records out
1048576 bytes (1.0 MB) copied, 0.00215578 s, 486 MB/s
namhyung@leonhard:linux$ ls -l /dev/ram*
brw-rw---- 1 root disk 1, 0 2011-05-25 15:41 /dev/ram0
brw-rw---- 1 root disk 1, 16 2011-05-25 15:41 /dev/ram1
brw-rw---- 1 root disk 1, 32 2011-05-25 15:41 /dev/ram2
brw-rw---- 1 root disk 1, 48 2011-05-25 15:41 /dev/ram3
brw-r--r-- 1 root root 1, 64 2011-05-25 15:45 /dev/ram4
brw-rw---- 1 root disk 1, 1024 2011-05-25 15:44 /dev/ram64
After this patch, /dev/ram4 - instead of /dev/ram64 - was
accessed correctly.
In addition, 'range' passed to blk_register_region() should
include all range of dev_t that RAMDISK_MAJOR can address.
It does not need to be limited by partition numbers unless
'rd_nr' param was specified.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Laurent Vivier <Laurent.Vivier@bull.net>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
brd_refcnt, brd_offset, brd_sizelimit and brd_blocksize in struct
brd_device seem to be copied from struct loop_device but they're
not used anywhere. Let get rid of them.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
I stupidly broke the case of CONFIG_HUGETLBFS=n when doing the
conversion to vm_flags_t in commit ca16d140af ("mm: don't access
vm_flags as 'int'"). And my 'allyesconfig' build didn't find it, for
obvious reasons..
Include <linux/mm_types.h> in <linux/hugetlb.h>. The problem could have
been avoided by just turning the hugetlb_file_setup() error wrapper into
a macro, but mm_types.h is a reasonable include in this file.
Reported-by: Richard -rw- Weinberger <richard.weinberger@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Eric Dumazet reports:
----
At boot, I have a crash in part_discard_alignment_show+0x1b/0x50
CR2 : 000006ac
fault in : mov 0x2c(%rcx),%edx
I suspect commit 23ceb5b771 (block: Remove extra
discard_alignment from hd_struct) being in fault
----
Not quite known how ->queue can be NULL while the sysfs entry
exists, but lets play it safe and check for a NULL queue.
The rest of the sysfs show strategies in check.c do not dereference
disk->queue.
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
As reported by Ingo Molnar, we still have configuration combinations
where use of the WARN_RATELIMIT interfaces break the build because
dependencies don't get met.
Instead of going down the long road of trying to make it so that
ratelimit.h can get included by kernel.h or asm-generic/bug.h,
just move the interface into ratelimit.h and make users have
to include that.
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Weiping Pan noticed that the module option description for
xmit_hash_policy was incorrect and was nice enough to post a patch to
fix it. The text was correct, but created a line over 80 characters and
I would rather not add those. I realized I could take a few minutes and
clean up all the descriptions and things would look much better. This
is the result.
Based on patch from Weiping Pan <panweiping3@gmail.com>.
Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
CC: Weiping Pan <panweiping3@gmail.com>
Reviewed-by: Weiping Pan <panweiping3@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The below patch removes vlan_buggyright and vlan_copyright from vlan_proto_init,
so that it prints out just the fullname of vlan and the version number.
before:
[ 30.438203] 802.1Q VLAN Support v1.8 Ben Greear <greearb@candelatech.com>
[ 30.441542] All bugs added by David S. Miller <davem@redhat.com>
after:
[ 31.513910] 802.1Q VLAN Support v1.8
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
CC: Joe Perches <joe@perches.com>
CC: David S. Miller <davem@davemloft.net>
CC: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
