14 Jan, 2011
40 commits
-
Signed-off-by: Lasse Collin
Cc: "H. Peter Anvin"
Cc: Alain Knaff
Cc: Albin Tonnerre
Cc: Phillip Lougher
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This header uses things like __be32, so pull in linux/types.h.
Further, it uses BLOCK_SIZE, so pull in linux/fs.h.
Signed-off-by: Mike Frysinger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cc: Ahmed S. Darwish
Cc: Kyungmin Park
Cc: Marco Stornelli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Generate a unique inode numbers for any entries in the cram file system.
For files which did not contain data's (device nodes, fifos and sockets)
the offset of the directory entry inside the cramfs plus 1 will be used as
inode number.The + 1 for the inode will it make possible to distinguish between a file
which contains no data and files which has data, the later one has a inode
value where the lower two bits are always 0.It also reimplements the behavior to set the size and the number of block
to 0 for special file, which is the right value for empty files, devices,
fifos and socketsAs a little benefit it will be also more compatible which older mkcramfs,
because it will never use the cramfs_inode->offset for creating a inode
number for special files.[akpm@linux-foundation.org: trivial comment fix]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Stefani Seibold
Cc: Al Viro
Cc: Pekka Enberg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently, 3 kernel function prototypes are present in a header
file exported to userland. This patch fixes it.Signed-off-by: Alexander Shishkin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
aio_run_iocbs() is not used at all, so get rid of it.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jeff Moyer
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
'nr >= min_nr >= 0' always satisfies 'nr >= 0' so the check is unnecesary.
Signed-off-by: Namhyung Kim
Acked-by: Jeff Moyer
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When hypervisor decides to decrease target balloon size while the balloon
driver tries to lock pages hypervisor may respond with
VMW_BALLOON_PPN_NOTNEEDED. Use this data and immediately stop reserving
pages and wait for the next update cycle to fetch new target instead of
continuing trying to lock pages until size of refused list grows above
VMW_BALLOON_MAX_REFUSED (16) pages.As a result the driver stops bothering the hypervisor with its attempts to
lock more pages that are not needed anymore. Most likely next order from
hypervisor will be to reduce ballon size anyway.It is a small optimization.
Signed-off-by: Dmitry Torokhov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is a 1-wire/w1 DS2423 slave driver for reading the values from all 4
counters available DS2423 devices by using standard w1_slave file. In
ds2423 the counters are tied to ram pages 12-15 in and each of those
ram-pages. Each of these counter values (and asoociated ram page values)
are represented as a own line in w1_slave file. Driver has been tested on
mips and x86.usage example:
cat /sys/bus/w1/devices/1d-00000009b964/w1_slave00 02 00 00 00 00 00 00 00 6d 38 00 ff ff 00 00 fe ff 00 00 ff ff 00 00 ff
ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
00 02 00 00 00 00 00 00 00 e0 1f 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff
ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
00 5a 0e 5f 18 00 00 00 00 0b 28 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff
ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=408882778
00 05 00 00 00 00 00 00 00 8d 39 ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff crc=YES c=5Patch includes also the documentation.
[randy.dunlap@oracle.com: fix ds2423 build, needs to select CRC16]
Signed-off-by: Mika Laitio
Signed-off-by: Randy Dunlap
Cc: Evgeniy Polyakov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Apart from currently used standard memstick data transfer method, Sony
introduced several newer ones, to uncover full bandwidth/capacity of its
Pro, HG and XC media formats. This patch lays a foundation to enable
those methods as made possible by host/media capabilities.As a side effect of this patch, mspro_block_read_attributes became more
streamlined and readable.[akpm@linux-foundation.org: fix printk warning]
Signed-off-by: Alex Dubov
Reported-by: Maxim Levitsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
mspro_block_mutex is identical in scope to mspro_block_disk_lock and therefore
unnecessary.Signed-off-by: Alex Dubov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Implement the usual pattern around idr_pre_get() and idr_get_new() to
handlethe situation where another thread concurrently steals this thread's
idr_pre_get() preallocation.Signed-off-by: Alex Dubov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Aries Lee
Signed-off-by: Takashi Iwai
Cc: Alex Dubov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a function jmb38x_ms_pmos() to enable / disable PMOS setups for
JMicron 38x controllers.Signed-off-by: Aries Lee
Signed-off-by: Takashi Iwai
Cc: Alex Dubov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch corrects the definition of clock values for JMicron 38x
controllers and sets the value properly per interface type.
Also, it adds a check for TPC errors in the interrupt handler.Signed-off-by: Aries Lee
Signed-off-by: Takashi Iwai
Cc: Alex Dubov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If device_register() fails then call put_device(). See comment to
device_register.Signed-off-by: Vasiliy Kulikov
Cc: Maxim Levitsky
Cc: Alex Dubov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals. It uses parport abstraction layer and hrtimers to
precisely control the signal.Signed-off-by: Alexander Gordeev
Cc: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals. It uses parport abstraction layer and hrtimers to
precisely control the signal.[akpm@linux-foundation.org: fix build]
Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add parallel port PPS client. It uses a standard method for capturing
timestamps for assert edge transitions: getting a timestamp soon after an
interrupt has happened.This is not a very precise source of time information due to interrupt
handling delays. However, timestamps for clear edge transitions are much
more precise because the interrupt handler continuously polls hardware
port until the transition is done.Hardware port operations require only about 1us so the maximum error
should not exceed this value. This was my primary goal when developing
this client.Clear edge capture could be disabled using clear_wait parameter.
Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add an optional feature of PPSAPI, kernel consumer support, which uses the
added hardpps() function.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
MONOTONIC_RAW clock timestamps are ideally suited for frequency
calculation and also fit well into the original NTP hardpps design. Now
phase and frequency can be adjusted separately: the former based on
REALTIME clock and the latter based on MONOTONIC_RAW clock.A new function getnstime_raw_and_real is added to timekeeping subsystem to
capture both timestamps at the same time and atomically.Signed-off-by: Alexander Gordeev
Acked-by: John Stultz
Cc: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This commit adds hardpps() implementation based upon the original one from
the NTPv4 reference kernel code from David Mills. However, it is highly
optimized towards very fast syncronization and maximum stickness to PPS
signal. The typical error is less then a microsecond.To make it sync faster I had to throw away exponential phase filter so
that the full phase offset is corrected immediately. Then I also had to
throw away median phase filter because it gives a bigger error itself if
used without exponential filter.Maybe we will find an appropriate filtering scheme in the future but it's
not necessary if the signal quality is ok.Signed-off-by: Alexander Gordeev
Acked-by: John Stultz
Cc: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the code that gatheres timestamp in pps_tty_dcd_change() in case
passed ts parameter is NULL because it never happens in the current code.
Fix comments as well.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Bitwise conjunction is distributive so we can simplify some conditions.
Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This way less overhead is involved when running production kernel. If you
want to debug a pps client module please define DEBUG to enable the
checks.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Now pps_idr_lock is never used in interrupt context so we can replace
spin_lock_irq/spin_unlock_irq with plain spin_lock/spin_unlock. But
there is also a potential race condition when someone can steal an id
which was allocated by idr_pre_get before it is used. So convert spin
lock to mutex and protect the whole id generation process.Signed-off-by: Alexander Gordeev
Cc: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since now idr is only used to manage char device id's and not used in
kernel API anymore it should be moved to pps.c. This also makes it
possible to release id only at actual device freeing so nobody can
register a pps device with the same id while our device is not freed yet.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since we now have direct pointers to struct pps_device everywhere it's
easy to use dev_* functions to print messages instead of plain printks.
Where dev_* cannot be used printks are converted to pr_*.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Using device index as a pointer needs some unnecessary work to be done
every time the pointer is needed (in irq handler for example). Using a
direct pointer is much more easy (and safe as well).Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a helper function to gather timestamps. This way clients don't have
to duplicate it.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There was a race in PPS_FETCH ioctl handler when several processes want to
obtain PPS data simultaneously using sleeping PPS_FETCH. They all sleep
most of the time in the system call.With the old approach when the first process waiting on the pps queue is
waken up it makes new system call right away and zeroes pps->go. So other
processes continue to sleep. This is a clear race condition because of
the global 'go' variable.With the new approach pps->last_ev holds some value increasing at each PPS
event. PPS_FETCH ioctl handler saves current value to the local variable
at the very beginning so it can safely check that there is a new event by
just comparing both variables.Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move variable declarations where they are used in pps_cdev_ioctl.
Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Here are some very trivial fixes combined:
- add macro definitions to protect header file from including several times
- remove declaration for an unexistent array
- fix typos
Signed-off-by: Alexander Gordeev
Acked-by: Rodolfo Giometti
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 4be2c95d ("taskstats: pad taskstats netlink response for aligment
issues on ia64") added a null field to align the taskstats structure but
the discussion centered around ia64. The issue exists on other platforms
with inefficient unaligned access and adding them piecemeal would be an
unmaintainable mess.This patch uses Dave Miller's suggestion of using a combination of
CONFIG_64BIT && !CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS to determine
whether alignment is needed.Note that this will cause breakage on those platforms with applications
like iotop which had hard-coded offsets into the packet to access the
taskstats structure.The message seen on systems without the alignment fixes looks like: kernel
unaligned access to 0xe000023879dca9bc, ip=0xa000000100133d10The addresses may vary but resolve to locations inside __delayacct_add_tsk.
iotop makes what I'd call unreasonable assumptions about the contents of a
netlink genetlink packet containing generic attributes. They're typed and
have headers that specify value lengths, so the client can (should)
identify and skip the ones the client doesn't understand.The kernel, as of version 2.6.36, presented a packet like so:
+--------------------------------+
| genlmsghdr - 4 bytes |
+--------------------------------+
| NLA header - 4 bytes | /* Aggregate header */
+-+------------------------------+
| | NLA header - 4 bytes | /* PID header */
| +------------------------------+
| | pid/tgid - 4 bytes |
| +------------------------------+
| | NLA header - 4 bytes | /* stats header */
| + -----------------------------+
Reported-by: David S. Miller
Acked-by: David S. Miller
Cc: Dan Carpenter
Cc: Balbir Singh
Cc: Florian Mickler
Cc: Guillaume Chazarain
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Creates a new "Near Field Communication" subsystem in drivers/nfc.
http://en.wikipedia.org/wiki/Near_Field_Communication is useful ;)This is a driver for the pn544 NFC device. The driver transfers
ETSI messages between the device and the user space.Signed-off-by: Matti J. Aaltonen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently on 64-bit arch the user_namespace is 2096 and when being
kmalloc-ed it resides on a 4k slab wasting 2003 bytes.If we allocate a separate cache for it and reduce the hash size from 128
to 64 chains the packaging becomes *much* better - the struct is 1072
bytes and the hole between is 98 bytes.[akpm@linux-foundation.org: s/__initcall/module_init/]
Signed-off-by: Pavel Emelyanov
Acked-by: Serge E. Hallyn
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
ctl_unnumbered.txt have been removed in Documentation directory so just
also remove this invalid comments[akpm@linux-foundation.org: fix Documentation/sysctl/00-INDEX, per Dave]
Signed-off-by: Jovi Zhang
Cc: Dave Young
Acked-by: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Jovi Zhang
Acked-by: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In fsl_rio_dbell_handler() the code currently simply acknowledges the QFI
queue full interrupt, but does nothing to resolve the queue full
condition. Instead, it jumps to the end of the isr. When a queue full
condition occurs, the isr is then re-entered immediately and continually,
forever.The fix is to just fall through and read out current doorbell entries.
Signed-off-by: Thomas Taranowski
Cc: Alexandre Bounine
Cc: Kumar Gala
Cc: Matt Porter
Cc: Li Yang
Cc: Thomas Moll
Cc: Micha Nelissen
Cc: Benjamin Herrenschmidt
Cc: Grant Likely
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add new sRIO switch device IDs and enable a basic support for them.
Signed-off-by: Alexandre Bounine
Cc: Kumar Gala
Cc: Matt Porter
Cc: Li Yang
Cc: Thomas Moll
Cc: Micha Nelissen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
