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path: root/drivers/char/synclink_gt.c
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* tty: move a number of tty drivers from drivers/char/ to drivers/tty/Greg Kroah-Hartman2011-02-22
| | | | | | | | | | | | | | | | | | | As planned by Arnd Bergmann, this moves the following drivers from drivers/char/ to drivers/tty/ as that's where they really belong: amiserial nozomi synclink rocket cyclades moxa mxser isicom bfin_jtag_comm Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: now phase out the ioctl file pointer for goodAlan Cox2011-02-17
| | | | | | | | | Only oddities here are a couple of drivers that bogusly called the ldisc helpers instead of returning -ENOIOCTLCMD. Fix the bug and the rest goes away. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tiocmset: kill the file pointer argumentAlan Cox2011-02-17
| | | | | | | | Doing tiocmget was such fun we should do tiocmset as well for the same reasons Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tiocmget: kill off the passing of the struct fileAlan Cox2011-02-17
| | | | | | | | | | We don't actually need this and it causes problems for internal use of this functionality. Currently there is a single use of the FILE * pointer. That is the serial core which uses it to check tty_hung_up_p. However if that is true then IO_ERROR is also already set so the check may be removed. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* drivers/char/synclink_gt.c: add extended sync featurePaul Fulghum2010-10-27
| | | | | | | | Add support for extended byte synchronous mode feature of hardware. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/char/synclink_gt.c: fix information leak to userlandVasiliy Kulikov2010-10-27
| | | | | | | | | | Structures tmp_params and new_line are copied to userland with some padding fields unitialized. It leads to leaking of stack memory. Signed-off-by: Vasiliy Kulikov <segooon@gmail.com> Acked-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink_gt: fix per device lockingPaul Fulghum2010-10-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a long standing bug with per device locking. Each device has an associated spinlock for synchronizing access to hardware and state information with the ISR. A single hardware card has one or more devices. Bug: Non ISR code correctly acquires and releases the per device lock. ISR incorrectly always acquires and releases the lock of the first device on the card. The decoupled and list based nature of the ISR and deferred processing interaction allowed this to work in normal operation. Exceptional events like an application forcing hardware shutdown, reset, or reconfiguration while active can trigger the bug. Fixed ISR to acquire and release the per device lock. One exception is manipulation of the GPIO card resource which is global and effectively owned by the first device of the card. Non-ISR access to GPIO resource is changed to use lock of first device on card. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: icount changeover for other main devicesAlan Cox2010-10-22
| | | | | | | | | | | Again basically cut and paste Convert the main driver set to use the hooks for GICOUNT Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* synclink: add mutex_unlock() on error pathDan Carpenter2010-08-23
| | | | | | | | | There is a path which still holds its mutex here. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: release BTM while sleeping in block_til_readyArnd Bergmann2010-08-10
| | | | | | | | | | | | Most tty drivers may block while opening a device. Since this possibly depends on another thread closing it first and both threads may need the BTM, we need to release it here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* synclink: reworking locking a bitAlan Cox2010-08-10
| | | | | | | | | | | Use the port mutex and port lock to fix the various races. The locking still isn't totally consistent but its better than before. Wants switching to the port helpers. Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* synclink: kill the big kernel lockAlan Cox2010-08-10
| | | | | | | | | | | We don't need it while waiting and we can lock the ioctls using the port mutex. While at it eliminate use of the hangup mutex and switch to the port mutex. Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* synclink: use ARRAY_SIZEKulikov Vasiliy2010-07-20
| | | | | | | | Change sizeof(x) / sizeof(*x) to ARRAY_SIZE(x). Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Acked-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* serial: synclink_gt: dropped transmit data bugfixPaul Fulghum2010-03-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix transmit bug that could drop send data if write() called close to serial transmitter going idle after sending previous data. Bug is caused by incorrect use of device information member tx_count. Driver originally processed one data block (write call) at a time, waiting for transmit idle before sending more. tx_count recorded how much data was loaded in DMA buffers on write(), and was cleared on send completion. tx_count use was overloaded to record accumulated data from put_char() callback when transmitter was idle. A bug was introduced when transmit code was reworked to allow multiple blocks of data in the tx DMA buffers which keeps transmitter from going idle between blocks. tx_count was set to size of last block loaded, cleared when tx went idle, and monitored to know when to restart transmitter without proper synchronization. tx_count could be cleared when unsent data remained in DMA buffers and transmitter required restarting, effectively dropping unsent data. Solution: 1. tx_count now used only to track accumulated data from put_char 2. DMA buffer state tracked by direct inspection of descriptors with spinlock synchronization 3. consolidate these tasks in tx_load() : a. check for available buffer space b. load buffers c. restart DMA and or serial transmitter as needed These steps were previously duplicated in multiple places, sometimes incompletely. 4. fix use of tx_count as active transmit indicator, instead using tx_active which is meant for that purpose Signed-off-by: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hdlc: convert to netdev_tx_tStephen Hemminger2009-09-01
| | | | | Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* headers: smp_lock.h reduxAlexey Dobriyan2009-07-12
| | | | | | | | | | | | | * Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink_gt: fix transmit race and timeoutPaul Fulghum2009-06-24
| | | | | | | | | | | | | Fix race condition when adding transmit data to active DMA buffer ring that can cause transmit stall. Update transmit timeout when adding data to active DMA buffer ring. Base transmit timeout on amount of buffered data instead of using fixed value. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: synclink_gt add receive pio modePaul Fulghum2009-06-11
| | | | | | | | | | | | Add receive programmed IO mode to reduce receive latency when using low data rates. The receive FIFO trigger level of 128 bytes used in DMA mode creates excessive latency when operating at low data rates. PIO mode is selected when user application requests data in blocks of less than 128 bytes. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: Add carrier processing on close to the tty_port coreAlan Cox2009-06-11
| | | | | | | | | | | | | | Some drivers implement this internally, others miss it out. Push the behaviour into the core code as that way everyone will do it consistently. Update the dtr rts method to raise or lower depending upon flags. Having a single method in this style fits most of the implementations more cleanly than two funtions. We need this in place before we tackle the USB side Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink_gt: add clock optionsPaul Fulghum2009-04-02
| | | | | | | | | | Add support for x8 asynchronous sample rate and ability to specify base clock frequency. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc tty: switch synclink_gt to ->proc_fopsAlexey Dobriyan2009-04-01
| | | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* WAN: Convert generic HDLC drivers to netdev_ops.Krzysztof Hałasa2009-01-21
| | | | | | | | Also remove unneeded last_rx update from Synclink drivers. Synclink part mostly by Stephen Hemminger. Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
* synclink_gt: enable RI interruptPaul Fulghum2009-01-15
| | | | | | | | | | - Enable ring indicator interrupt. - Remove vendor specific CVS version tags. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: Introduce some close helpers for portsAlan Cox2009-01-02
| | | | | | | Again this is a lot of common code we can unify Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: Pull the dtr raise into tty portAlan Cox2009-01-02
| | | | | | | | This moves another per device special out of what should be shared open wait paths into private methods Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty_port: Add a port level carrier detect operationAlan Cox2009-01-02
| | | | | | | | This is the first step to generalising the various pieces of waiting logic duplicated in all sorts of serial drivers. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* removed unused #include <version.h>Huang Weiyi2008-08-16
| | | | | | | | | | | | The drivers below do not use LINUX_VERSION_CODE nor KERNEL_VERSION. drivers/char/pcmcia/ipwireless/tty.c drivers/char/synclink_gt.c drivers/char/xilinx_hwicap/xilinx_hwicap.c This patch removes the said #include <version.h>. Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-jeff' of ↵Jeff Garzik2008-08-07
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6 into tmp
| * Remove bogus dosyncppp variable from synclink drivers.Krzysztof Hałasa2008-07-23
| | | | | | | | Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
* | synclink_gt fix locking in error path of rx enablePaul Fulghum2008-07-22
| | | | | | | | | | | | | | | | | | | | Fix locking in error path of rx_enable() introduced by synclink_gt-add-rx-dma-buffer-fill-level-control patch. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | synclink_gt: add rx DMA buffer fill level controlPaul Fulghum2008-07-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add run time control for receive DMA buffer fill level to allow application to control receive latency when using stream oriented serial protocols that pass receive data to application only after a DMA buffer fills. This was previously a compile time option, but run time control is needed when application changes data rate (and latency requirements) or uses different data rates on different ports. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | synclink_gt: leave transmitter in reset state after configurationPaul Fulghum2008-07-22
| | | | | | | | | | | | | | | | | | | | | | Leave the transmitter in reset state after configuration so that transmit signal is held at mark until transmitter is explicitly enabled by application, otherwise transmitter sends idle pattern. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | synclink_gt: improve TIOCOUTQ accuracyPaul Fulghum2008-07-22
| | | | | | | | | | | | | | | | | | | | | | | | Improve the accuracy of TIOCOUTQ value as implemented in chars_in_buffer() method by walking and counting tx DMA buffers, reading controller tx FIFO level and accounting for controller tx shift register. The greatly improves application control of transmit latency at lower data rates. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | synclink_gt: add serial bit order controlPaul Fulghum2008-07-22
| | | | | | | | | | | | | | | | | | | | Add control of hardware serial bit order between LSB first (default/standard) and MSB first. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | synclink_gt: improve and simplify write methodPaul Fulghum2008-07-22
| | | | | | | | | | | | | | | | | | | | | | Improve write method by allowing multiple HDLC frames to be loaded into tx DMA buffer ring for continuous frame transmission. This simplifies the transmit code by using the common procedures for all serial protocols. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | tty: rework break handlingAlan Cox2008-07-22
|/ | | | | | | | | Some hardware needs to do break handling itself and may have partial support only. Make break_ctl return an error code. Add a tty driver flag so you can indicate driver hardware side break support. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2008-07-20
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (1232 commits) iucv: Fix bad merging. net_sched: Add size table for qdiscs net_sched: Add accessor function for packet length for qdiscs net_sched: Add qdisc_enqueue wrapper highmem: Export totalhigh_pages. ipv6 mcast: Omit redundant address family checks in ip6_mc_source(). net: Use standard structures for generic socket address structures. ipv6 netns: Make several "global" sysctl variables namespace aware. netns: Use net_eq() to compare net-namespaces for optimization. ipv6: remove unused macros from net/ipv6.h ipv6: remove unused parameter from ip6_ra_control tcp: fix kernel panic with listening_get_next tcp: Remove redundant checks when setting eff_sacks tcp: options clean up tcp: Fix MD5 signatures for non-linear skbs sctp: Update sctp global memory limit allocations. sctp: remove unnecessary byteshifting, calculate directly in big-endian sctp: Allow only 1 listening socket with SO_REUSEADDR sctp: Do not leak memory on multiple listen() calls sctp: Support ipv6only AF_INET6 sockets. ...
| * WAN: convert drivers to use built-in netdev_statsKrzysztof Halasa2008-07-04
| | | | | | | | | | | | | | | | There is no point in using separate net_device_stats structs when the one in struct net_device is present. Compiles. Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | tty: add more tty_port fieldsAlan Cox2008-07-20
| | | | | | | | | | | | | | Move more bits into the tty_port structure Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | synclink: use tty_portAlan Cox2008-07-20
| | | | | | | | | | | | | | Switch the synclink ports to use the new tty_port structure Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | tty: Ldisc revampAlan Cox2008-07-20
|/ | | | | | | | | | | | Move the line disciplines towards a conventional ->ops arrangement. For the moment the actual 'tty_ldisc' struct in the tty is kept as part of the tty struct but this can then be changed if it turns out that when it all settles down we want to refcount ldiscs separately to the tty. Pull the ldisc code out of /proc and put it with our ldisc code. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/char/synclink_gt.c: don't return an uninitialised localAndrew Morton2008-05-13
| | | | | | | | | | | | drivers/char/synclink_gt.c: In function 'put_char': drivers/char/synclink_gt.c:919: warning: 'ret' may be used uninitialized in this function The compiler speaketh truth. Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* char serial: switch drivers to ioremap_nocacheAlan Cox2008-04-30
| | | | | | | | | | | | | Simple search/replace except for synclink.c where I noticed a real bug and fixed it too. It was doing NULL + offset, then checking for NULL if the remap failed. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Acked-by: Jiri Slaby <jirislaby@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink series: switch to int put_char methodAlan Cox2008-04-30
| | | | | | | | Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty/serial: lay the foundations for the next set of reworksAlan Cox2008-04-30
| | | | | | | | | | | | | | | | | | | | | | | | - Stop drivers calling their own flush method indirectly, it obfuscates code and it will change soon anyway - A few more lock_kernel paths temporarily needed in some driver internal waiting code - Remove private put_char method that does a write call for one char - we have that anyway - Most but not yet all of the termios copy under lock fixing (some has other dependencies to follow) - Note a few locking bugs in drivers found in the process - Kill remaining [ab]users of TIOCG/SSOFTCAR in the driver, these must go to fix the termios locking Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink series: Prepare for BKL pushdownAlan Cox2008-04-30
| | | | | | | | | | As these are quite complex I've simply pushed the BKL down into the ioctl handler not tried to do anything neater. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink drivers bool conversionJoe Perches2008-04-28
| | | | | | | | | | | | Remove more TRUE/FALSE defines and uses Remove == TRUE tests Convert BOOLEAN to bool Convert int to bool where appropriate Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/char: minor irq handler cleanupsJeff Garzik2008-04-20
| | | | | | | | | | - remove always-false tests - don't overload 'irq' argument, pass data properly via dev_id - remove pointless casts from void* Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* synclink_gt fix missed serial input signal changesPaul Fulghum2008-02-06
| | | | | | | | | | Fix missed serial input signal changes caused by rereading the serial status register during interrupt processing. Now processing is performed on original status register value. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink: standardize format of linux header file include's with "<>"Robert P. J. Day2008-02-06
| | | | | | | | | | Use the recommended form of "<>" to include linux header files, and move those includes up to join the rest of the linux includes. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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