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2009-10-07ath9k: rename btcoex_scheme to just schemeLuis R. Rodriguez
btcoex_scheme is already part of a btcoex struct, its implied this is btcoex related. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: remove unused bt_duty_cycleLuis R. Rodriguez
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: move bt_stomp_type to driver coreLuis R. Rodriguez
The bt_stomp_type defines the bt coex weight, it has a one-to-one mapping. In the future we may want to just use the weight directly. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: replaces SC_OP_BTCOEX_ENABLED with a boolLuis R. Rodriguez
Whether or not bluetooth coex has been enabled is a hardware state and only the hardware helpers will be able to set this. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: split ath9k_hw_btcoex_enable() into two helpersLuis R. Rodriguez
One for 2-wire and another for 3-wire. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: move driver core helpers to main.cLuis R. Rodriguez
Keep on btcoex.c only hardware access helpers, move the driver core specific code to main.c. To accomplish this we had to split ath_init_btcoex_info() into two parts, the driver core part -- ath_init_btcoex_timer() and the hw specific part -- ath9k_hw_init_btcoex_hw_info(). This highlights how ath_gen_timer is part of the driver core, not hw related, so stuff that into ath_btcoex struct. The ath9k_hw_btcoex_init() code is now put inline on ath_init_softc() through a switch to it easier to follow, since we did that we can now call ath_tx_get_qnum() from the main.c instead of btcoex.c Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: split bluetooth hardware coex init into two helpersLuis R. Rodriguez
Use a helper for 2-wire and another for 3-wire. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: move hw specific btcoex info to ath_hwLuis R. Rodriguez
Since we now access it via the ath_hw declare the ath_hw pointer at the header of some routines and se it. ath9k.h no longer needs to access btcoex.h and to adjust for this move ath_btcoex_set_weight() into btcoex.h and instead give main.c a helper for setting initial values upon drv_start() Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: move btcoex core driver info to its own structLuis R. Rodriguez
There is some bluetooth coexistance data which is driver specific, stuff that into its own structure. Cc: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-07ath9k: use ath_hw for DPRINTF() and debug init/exitLuis R. Rodriguez
DPRINTF() is used in hw specific related code, as such ensure we don't rely on the private driver core ath_softc struct when calling it. Drivers can then implement their own DPRINTF() as they see fit. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-05net: export device speed and duplex via sysfsAndy Gospodarek
This patch exports the link-speed (in Mbps) and duplex of an interface via sysfs. This eliminates the need to use ethtool just to check the link-speed. Not requiring 'ethtool' and not relying on the SIOCETHTOOL ioctl should be helpful in an embedded environment where space is at a premium as well. NOTE: This patch also intentionally allows non-root users to check the link speed and duplex -- something not possible with ethtool. Here's some sample output: # cat /sys/class/net/eth0/speed 100 # cat /sys/class/net/eth0/duplex half # ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: Not reported Advertised auto-negotiation: No Speed: 100Mb/s Duplex: Half Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: off Supports Wake-on: g Wake-on: g Current message level: 0x000000ff (255) Link detected: yes Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05cfg80211: assign device type in netdev notifier callbackMarcel Holtmann
Instead of having to modify every non-mac80211 for device type assignment, do this inside the netdev notifier callback of cfg80211. So all drivers that integrate with cfg80211 will export a proper device type. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05net: introduce NETDEV_POST_INIT notifierJohannes Berg
For various purposes including a wireless extensions bugfix, we need to hook into the netdev creation before before netdev_register_kobject(). This will also ease doing the dev type assignment that Marcel was working on for cfg80211 drivers w/o touching them all. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05usbnet: Set device type for wlan and wwan devicesMarcel Holtmann
For usbnet devices with FLAG_WLAN and FLAG_WWAN set the proper device type so that uevent contains the correct value. This then allows an easy identification of the actual underlying technology of the Ethernet device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05usbnet: Use wwan%d interface name for mobile broadband devicesMarcel Holtmann
Add support for usbnet based devices like CDC-Ether to indicate that they are actually mobile broadband devices. In that case use wwan%d as default interface name. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05tunnels: Optimize tx pathEric Dumazet
We currently dirty a cache line to update tunnel device stats (tx_packets/tx_bytes). We better use the txq->tx_bytes/tx_packets counters that already are present in cpu cache, in the cache line shared with txq->_xmit_lock This patch extends IPTUNNEL_XMIT() macro to use txq pointer provided by the caller. Also &tunnel->dev->stats can be replaced by &dev->stats Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05ipv4: fib table algorithm performance improvementStephen Hemminger
The FIB algorithim for IPV4 is set at compile time, but kernel goes through the overhead of function call indirection at runtime. Save some cycles by turning the indirect calls to direct calls to either hash or trie code. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05af_packet: add interframe drop cmsg (v6)Neil Horman
Add Ancilliary data to better represent loss information I've had a few requests recently to provide more detail regarding frame loss during an AF_PACKET packet capture session. Specifically the requestors want to see where in a packet sequence frames were lost, i.e. they want to see that 40 frames were lost between frames 302 and 303 in a packet capture file. In order to do this we need: 1) The kernel to export this data to user space 2) The applications to make use of it This patch addresses item (1). It does this by doing the following: A) Anytime we drop a frame for which we would increment po->stats.tp_drops, we also no increment a stats called po->stats.tp_gap. B) Every time we successfully enqueue a frame to sk_receive_queue, we record the value of po->stats.tp_gap in skb->mark. skb->cb would nominally be the place to record this, but since all the space there is used up, we're overloading skb->mark. Its safe to do since any enqueued packet is guaranteed to be unshared at this point, and skb->mark isn't used for anything else in the rx path to the application. After we record tp_gap in the skb, we zero po->stats.tp_gap. This allows us to keep a counter of the number of frames lost between any two enqueued packets C) When the application goes to dequeue a frame from the packet socket, we look at skb->mark for that frame. If it is non-zero, we add a cmsg chunk to the msghdr of level SOL_PACKET and type PACKET_GAPDATA. Its a 32 bit integer that represents the number of frames lost between this packet and the last previous frame received. Note there is a chance that if there is frame loss after a receive, and then the socket is closed, some gap data might be lost. This is covered by the use of the PACKET_AUXDATA socket option, which gives total loss data. With a bit of math, the final gap can be determined that way. I've tested this patch myself, and it works well. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> include/linux/if_packet.h | 2 ++ net/packet/af_packet.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05TI DaVinci EMAC: Minor macro related updateschaithrika@ti.com
Use BIT for macro definitions wherever possible, remove unused and redundant macros. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05pktgen: Avoid dirtying skb->users when txq is fullEric Dumazet
We can avoid two atomic ops on skb->users if packet is not going to be sent to the device (because hardware txqueue is full) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05icmp: No need to call sk_write_space()Eric Dumazet
We can make icmp messages tx completion callback a litle bit faster. Setting SOCK_USE_WRITE_QUEUE sk flag tells sock_wfree() to not call sk_write_space() on a socket we know no thread is posssibly waiting for write space. (on per cpu kernel internal icmp sockets only) This avoids the sock_def_write_space() call and read_lock(&sk->sk_callback_lock)/read_unlock(&sk->sk_callback_lock) calls as well. We avoid three atomic ops. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05ethtool: Remove support for obsolete string query operationsBen Hutchings
The in-tree implementations have all been converted to get_sset_count(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05net: Convert ethtool {get_stats, self_test}_count() ops to get_sset_count()Ben Hutchings
These string query operations were supposed to be replaced by the generic get_sset_count() starting in 2007. Convert the remaining implementations. Also remove calls to these operations to initialise drvinfo->n_stats. The ethtool core code already does that. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05tehuti: Convert ethtool get_stats_count() ops to get_sset_count()Ben Hutchings
This string query operation was supposed to be replaced by the generic get_sset_count() starting in 2007. Convert tehuti's implementation. Also remove the dummy self-test name which was not used since tehuti does not advertise any self-tests. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05qeth: Convert ethtool get_stats_count() ops to get_sset_count()Ben Hutchings
This string query operation was supposed to be replaced by the generic get_sset_count() starting in 2007. Convert qeth's implementation. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-04Linux 2.6.32-rc3Linus Torvalds
I'm skipping -rc2 because the -rc1 Makefile mistakenly said -rc2, so in order to avoid confusion, I'm jumping from -rc1 to -rc3. That way, when 'uname' (or an oops report) says 2.6.32-rc2, there's no confusion about whether people perhaps meant -rc1 or -rc2.
2009-10-04headers: remove sched.h from poll.hAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-10-04Merge branch 'acpi-pad' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: acpi_pad: build only on X86 ACPI: create Processor Aggregator Device driver Fixup trivial conflicts in MAINTAINERS file.
2009-10-04Merge branch 'sfi-release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6 * 'sfi-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6: SFI: remove __init from sfi_verify_table SFI: fix section mismatch warnings in sfi_core.c
2009-10-04Merge branch 'release' of ↵Linus Torvalds
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: EC: Don't parse DSDT for EC early init on Compal ACPI: EC: Rewrite DMI checks ACPI: dock: fix "sibiling" typo ACPI: kill overly verbose "throttling states" log messages ACPI: Fix bound checks for copy_from_user in the acpi /proc code ACPI: fix bus scanning memory leaks ACPI: EC: Restart command even if no interrupts from EC sony-laptop: Don't unregister the SPIC driver if it wasn't registered sony-laptop: remove _INI call at init time sony-laptop: SPIC unset IRQF_SHARED, set IRQF_DISABLED sony-laptop: remove device_ctrl and the SPIC mini drivers
2009-10-04Merge branch 'i2c-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: macintosh: Don't assume i2c device probing always succeeds i2c: Hide probe errors caused by ACPI resource conflicts i2c: Minor documentation update mfd: AB3100 drop unused module parameters Staging: IIO: tsl2561: Drop unused module parameters leds: leds-pca9532 - Drop unused module parameters ltc4215/ltc4245: Discard obsolete detect methods ds2482: Discard obsolete detect method max6875: Discard obsolete detect method i2c: Move misc devices documentation
2009-10-04macintosh: Don't assume i2c device probing always succeedsJean Delvare
If i2c device probing fails, then there is no driver to dereference after calling i2c_new_device(). Stop assuming that probing will always succeed, to avoid NULL pointer dereferences. We have an easier access to the driver anyway. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Tim Shepard <shep@alum.mit.edu> Cc: Colin Leroy <colin@colino.net>
2009-10-04i2c: Hide probe errors caused by ACPI resource conflictsJean Delvare
When an ACPI resource conflict is detected, error messages are already printed by ACPI. There's no point in causing the driver core to print more error messages, so return one of the error codes for which no message is printed. This fixes bug #14293: http://bugzilla.kernel.org/show_bug.cgi?id=14293 Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-10-04i2c: Minor documentation updateJean Delvare
The sysfs path to i2c adapters has changed recently, update the documentation to reflect that change. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-10-04mfd: AB3100 drop unused module parametersJean Delvare
The I2C_CLIENT_INSMOD_1 macro is only useful for i2c drivers which implement device detection. The ab3100 driver doesn't, so there is no point in calling it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Cc: Samuel Ortiz <sameo@linux.intel.com>
2009-10-04Staging: IIO: tsl2561: Drop unused module parametersJean Delvare
The I2C_CLIENT_INSMOD macro is only useful for i2c drivers which implement device detection. The tsl2561 driver doesn't, so there is no point in calling it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Jonathan Cameron <jic23@cam.ac.uk>
2009-10-04leds: leds-pca9532 - Drop unused module parametersJean Delvare
The I2C_CLIENT_INSMOD_1 macro is only useful for i2c drivers which implement device detection. The leds-pca9532 driver doesn't, so there is no point in calling it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Riku Voipio <riku.voipio@iki.fi>
2009-10-04ltc4215/ltc4245: Discard obsolete detect methodsJean Delvare
There is no point in implementing a detect callback for the LTC4215 and LTC4245, as these devices can't be detected. It was there solely to handle "force" module parameters to instantiate devices, but now we have a better sysfs interface that can do the same. So we can get rid of the ugly module parameters and the detect callbacks. This shrinks the binary module sizes by 36% and 46%, respectively. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ira W. Snyder <iws@ovro.caltech.edu>
2009-10-04ds2482: Discard obsolete detect methodJean Delvare
There is no point in implementing a detect callback for the DS2482, as this device can't be detected. It was there solely to handle "force" module parameters to instantiate devices, but now we have a better sysfs interface that can do the same. So we can get rid of the ugly module parameters and the detect callback. This shrinks the binary module size by 21%. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Ben Gardner <gardner.ben@gmail.com>
2009-10-04max6875: Discard obsolete detect methodJean Delvare
There is no point in implementing a detect callback for the MAX6875, as this device can't be detected. It was there solely to handle "force" module parameters to instantiate devices, but now we have a better sysfs interface that can do the same. So we can get rid of the ugly module parameters and the detect callback. This basically divides the binary module size by 2. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Ben Gardner <gardner.ben@gmail.com>
2009-10-04i2c: Move misc devices documentationJean Delvare
Some times ago the eeprom and max6875 drivers moved to drivers/misc/eeprom, but their documentation did not follow. It's finally time to get rid of Documentation/i2c/chips. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ben Gardner <gardner.ben@gmail.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
2009-10-04Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (41 commits) Revert "Seperate read and write statistics of in_flight requests" cfq-iosched: don't delay async queue if it hasn't dispatched at all block: Topology ioctls cfq-iosched: use assigned slice sync value, not default cfq-iosched: rename 'desktop' sysfs entry to 'low_latency' cfq-iosched: implement slower async initiate and queue ramp up cfq-iosched: delay async IO dispatch, if sync IO was just done cfq-iosched: add a knob for desktop interactiveness Add a tracepoint for block request remapping block: allow large discard requests block: use normal I/O path for discard requests swapfile: avoid NULL pointer dereference in swapon when s_bdev is NULL fs/bio.c: move EXPORT* macros to line after function Add missing blk_trace_remove_sysfs to be in pair with blk_trace_init_sysfs cciss: fix build when !PROC_FS block: Do not clamp max_hw_sectors for stacking devices block: Set max_sectors correctly for stacking devices cciss: cciss_host_attr_groups should be const cciss: Dynamically allocate the drive_info_struct for each logical drive. cciss: Add usage_count attribute to each logical drive in /sys ...
2009-10-04Revert "Seperate read and write statistics of in_flight requests"Jens Axboe
This reverts commit a9327cac440be4d8333bba975cbbf76045096275. Corrado Zoccolo <czoccolo@gmail.com> reports: "with 2.6.32-rc1 I started getting the following strange output from "iostat -kx 2": Linux 2.6.31bisect (et2) 04/10/2009 _i686_ (2 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 10,70 0,00 3,16 15,75 0,00 70,38 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 18,22 0,00 0,67 0,01 14,77 0,02 43,94 0,01 10,53 39043915,03 2629219,87 sdb 60,89 9,68 50,79 3,04 1724,43 50,52 65,95 0,70 13,06 488437,47 2629219,87 avg-cpu: %user %nice %system %iowait %steal %idle 2,72 0,00 0,74 0,00 0,00 96,53 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 sdb 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 avg-cpu: %user %nice %system %iowait %steal %idle 6,68 0,00 0,99 0,00 0,00 92,33 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 sdb 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 avg-cpu: %user %nice %system %iowait %steal %idle 4,40 0,00 0,73 1,47 0,00 93,40 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 100,00 sdb 0,00 4,00 0,00 3,00 0,00 28,00 18,67 0,06 19,50 333,33 100,00 Global values for service time and utilization are garbage. For interval values, utilization is always 100%, and service time is higher than normal. I bisected it down to: [a9327cac440be4d8333bba975cbbf76045096275] Seperate read and write statistics of in_flight requests and verified that reverting just that commit indeed solves the issue on 2.6.32-rc1." So until this is debugged, revert the bad commit. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-10-04cfq-iosched: don't delay async queue if it hasn't dispatched at allJens Axboe
We cannot delay for the first dispatch of the async queue if it hasn't dispatched at all, since that could present a local user DoS attack vector using an app that just did slow timed sync reads while filling memory. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-10-03Merge branch 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_devLinus Torvalds
* 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_dev: m32r: Fix IPI function calls for SMP m32r: Fix set_memory() for DISCONTIGMEM m32r: add rtc_lock variable m32r: define ioread* and iowrite* macros m32r: export delay loop symbols m32r: fix tme_handler
2009-10-03tty: Avoid dropping ldisc_mutex over hangup tty re-initializationLinus Torvalds
A couple of people have hit the WARN_ON() in drivers/char/tty_io.c, tty_open() that is unhappy about seeing the tty line discipline go away during the tty hangup. See for example http://bugzilla.kernel.org/show_bug.cgi?id=14255 and the reason is that we do the tty_ldisc_halt() outside the ldisc_mutex in order to be able to flush the scheduled work without a deadlock with vhangup_work. However, it turns out that we can solve this particular case by - using "cancel_delayed_work_sync()" in tty_ldisc_halt(), which waits for just the particular work, rather than synchronizing with any random outstanding pending work. This won't deadlock, since the buf.work we synchronize with doesn't care about the ldisc_mutex, it just flushes the tty ldisc buffers. - realize that for this particular case, we don't need to wait for any hangup work, because we are inside the hangup codepaths ourselves. so as a result we can just drop the flush_scheduled_work() entirely, and then move the tty_ldisc_halt() call to inside the mutex. That way we never expose the partially torn down ldisc state to tty_open(), and hold the ldisc_mutex over the whole sequence. Reported-by: Ingo Molnar <mingo@elte.hu> Reported-by: Heinz Diehl <htd@fancy-poultry.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-10-04m32r: Fix IPI function calls for SMPToshihiro HANAWA
This patch fixes the m32r SMP kernel after 2.6.27. A part of the following patch breaks m32r SMP operation. > m32r: convert to generic helpers for IPI function calls > commit 7b7426c8a615cf61df9a77b9df7d5b75d91e3fa0 In the above patch, a CALL_FUNC_SINGLE_IPI was newly introduced, but the its IPI vector number was wrong in the patch code. The m32r SMP kernel hanged-up during boot operation, because the CPU_BOOT_IPI was called instead of CALL_FUNC_SINGLE_IPI (CPU_BOOT_IPI had no side effect at that time because the 2nd core had already been started up), as a result, csd_unlock() was not called, then a dead lock occurred in csd_lock_wait() after the detection of Compact Flash memory as IDE generic disk. Signed-off-by: Toshihiro HANAWA <hanawa@ccs.tsukuba.ac.jp> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
2009-10-04m32r: Fix set_memory() for DISCONTIGMEMHirokazu Takata
In case CONFIG_DISCONTIGMEM is set, the memory size of system was always determined by CONFIG_MEMORY_SIZE and was not changeable. This patch fixes set_memory() of arch/m32r/mm/discontig.c so that we can specify memory size by the "mem=<size>" kernel parameter. Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
2009-10-04m32r: add rtc_lock variableHirokazu Takata
Add a spinlock variable "rtc_lock". This is taken from arch/arm/kernel/time.c. Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
2009-10-04m32r: define ioread* and iowrite* macrosHirokazu Takata
Define ioread* and iowrite* macros to fix the following build errors: CC [M] drivers/uio/uio_smx.o drivers/uio/uio_smx.c: In function 'smx_handler': drivers/uio/uio_smx.c:31: error: implicit declaration of function 'ioread32' drivers/uio/uio_smx.c:37: error: implicit declaration of function 'iowrite32' Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>