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2007-07-17knfsd: exportfs: untangle ISDIR logic in find_exported_dentryChristoph Hellwig1-16/+10
Rework some logic in find_exported_dentry so that we only have a single S_ISDIR check and logic that makes clear to the reader what we're really doing here. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17knfsd: exportfs: remove CALL macroChristoph Hellwig1-56/+72
Currently exportfs uses a way to call methods very differently from the rest of the kernel. This patch changes it to the standard conventions for method calls. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17knfsd: exportfs: add procedural interface for NFSDChristoph Hellwig3-14/+33
Currently NFSD calls directly into filesystems through the export_operations structure. I plan to change this interface in various ways in later patches, and want to avoid the export of the default operations to NFSD, so this patch adds two simple exportfs_encode_fh/exportfs_decode_fh helpers for NFSD to call instead of poking into exportfs guts. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17knfsd: exportfs: remove iget abuseChristoph Hellwig7-53/+71
When the exportfs interface was added the expectation was that filesystems provide an operation to convert from a file handle to an inode/dentry, but it kept a backwards compat option that still calls into iget. Calling into iget from non-filesystem code is very bad, because it gives too little information to filesystem, and simply crashes if the filesystem doesn't implement the ->read_inode routine. Fortunately there are only two filesystems left using this fallback: efs and jfs. This patch moves a copy of export_iget to each of those to implement the get_dentry method. While this is a temporary increase of lines of code in the kernel it allows for a much cleaner interface and important code restructuring in later patches. [akpm@linux-foundation.org: add jfs_get_inode_flags() declaration] Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17knfsd: exportfs: add exportfs.h headerChristoph Hellwig20-113/+140
currently the export_operation structure and helpers related to it are in fs.h. fs.h is already far too large and there are very few places needing the export bits, so split them off into a separate header. [akpm@linux-foundation.org: fix cifs build] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Neil Brown <neilb@suse.de> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17i2o debug output cleanupVasily Averin1-67/+67
Fix output of i2o debug messages, extra KERN_ are removed. Signed-off-by: Vasily Averin <vvs@sw.ru> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Acked-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17i2o proc reading oopsVasily Averin1-0/+2
Fix oops on reading from some i2o proc files (i2o_seq_show_driver_store() and other) because their handlers uses "exec" field in struct i2o_controller Signed-off-by: Vasily Averin <vvs@sw.ru> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Acked-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17i2o message leak in i2o_msg_post_wait_mem()Vasily Averin1-1/+3
We need to free i2o msg in case of error. Signed-off-by: Vasily Averin <vvs@sw.ru> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Acked-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17wrong memory access in i2o_block_device_lock()Vasily Averin1-1/+1
This patch fixes access to memory that has not been allocated: i2o_msg_get_wait() can returns errors different from I2O_QUEUE_EMPTY. But the result is checked only against this code. If it is not I2O_QUEUE_EMPTY then we dereference the error code as the pointer later. Signed-off-by: Vasily Averin <vvs@sw.ru> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Acked-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17i2o_cfg_passthru cleanupVasily Averin1-24/+38
This patch fixes a number of issues in i2o_cfg_passthru{,32}: - i2o_msg_get_wait() return vaile is not checked; - i2o_message memory leaks on error paths; - infinite loop to sg_list_cleanup in passthru32 It's important issue because of i2o_cfg_passthru is used by raidutils for monitorig controllers state, and in case of memory shortage it leads to the node crash or disk IO stall. [akpm@linux-foundation.org: fix null-ptr deref] Signed-off-by: Vasily Averin <vvs@sw.ru> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Acked-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17i4l: leak in eicon/idifunc.cArmin Schindler1-0/+1
coverity spotted a possible leak in the idifunc.c file (bug id #1252), in um_new_card(), if the diva_user_mode_idi_create_adapter() fails, we dont free the memory allocated for card Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Acked-by: Armin Schindler <armin@melware.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17isdn/capi warning fixesAndrew Morton1-1/+1
drivers/isdn/capi/capi.c: In function 'handle_minor_send': drivers/isdn/capi/capi.c:552: warning: cast from pointer to integer of different size Of course, the code here might actually be buggy, in which case this patch should not be applied? Answer: No this field is ignored inside linux kernel.Yes this is ugly, but it's the CAPI spec for all OS. CAPI DATA_B3 Request/Indication CAPI Message has a mandatory field which represent the 32 bit buffer address of the payload data. In linux the payload data do not use a sperate buffer, data follows directely after the CAPI Message in the same skb and we use this assumption inside the drivers, so we can ignore this field. Inside the linux CAPI implemetation we never use this field, so it could also have no value, but since random data in a message is bad as well (e.g. displayed in CAPI traces) we set is to the most adequate value. Outside the kernel the capi20 library sets the correct addresses (there is an optional second field for 64 bit adresses for 64 bit systems, we do not use here). Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Use menuconfig objects: ISDN: CONFIG_CAPI_EICONJan Engelhardt1-11/+10
Transform Kconfig objects from "menu, config" into "menuconfig" so that the user can disable the whole feature without having to enter the menu first. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Use menuconfig objects: ISDN: CONFIG_CAPI_AVMJan Engelhardt1-12/+10
Transform Kconfig objects from "menu, config" into "menuconfig" so that the user can disable the whole feature without having to enter the menu first. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Use menuconfig objects: ISDN: CONFIG_ISDN_CAPIJan Engelhardt5-15/+13
Transform "depends on" into a simpler if-endif block style dependency. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Use menuconfig objects: ISDN: CONFIG_ISDNJan Engelhardt5-16/+10
Transform Kconfig objects from "menu, config" into "menuconfig" so that the user can disable the whole feature without having to enter the menu first. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17sane irq initialization in sedlbauer hisaxKarsten Keil1-1/+7
The interrupts schould be disabled until the driver is ready and the IRQ function was registered. Thanks to Bastian Friedrich and Thomas Voegtle for spotting this. Signed-off-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Bastian Friedrich <bastian@bastian-friedrich.de> Signed-off-by: Thomas Voegtle <tv@lio96.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Make ISDN CAPI use seq_list_xxx helpersPavel Emelianov1-24/+4
The similar code exists here and is called capi_driver_get_idx(). Use generic helpers now and remember to convert list_head to struct capi_driver in .show callback. Signed-off-by: Pavel Emelianov <xemul@openvz.org> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Mismatching declarations of revision strings in HiSaxDavid Woodhouse1-5/+5
The {l1,l2,l3,lli,tei}_revision strings in the HiSax driver are 'const', but have a mismatching declaration as 'extern char *' in config.c. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Use mutex instead of semaphore in CAPI 2.0 driverMatthias Kaehlcke2-4/+4
The CAPI 2.0 driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17use mutex instead of semaphore in SPI core/init codeMatthias Kaehlcke1-5/+6
The SPI core/init code uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Acked-by: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17spi_txx9 controller driverAtsushi Nemoto3-0/+481
This is a driver for SPI controller built into TXx9 MIPS SoCs. This driver is derived from arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17SPI: omap2_mcspi driverSamuel Ortiz3-0/+1088
Add OMAP24XX McSPI (Multichannel SPI) controller driver. This driver is tested very well under OMAP GIT tree with N800 - Nokia Internet Tablet, and some other OMAP2 boards. Recent updates included bugfixes, cleanups, speedups, and better conformance to the current SPI programming interface. This doesn't yet understand the third controller instance on the OMAP 2430. [david-b@pacbell.net: more minor cleanups to the omap2_mcspi driver] Signed-off-by: Juha Yrjölä <juha.yrjola@solidboot.com> Signed-off-by: Trilok Soni <soni.trilok@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17spi_mpc83xx.c: support QE enabled 83xx CPU's like mpc832xJoakim Tjernlund2-4/+30
Quicc Engine enabled mpc83xx CPU's has a somewhat different HW interface to the SPI controller. This patch adds a qe_mode knob that sees to that needed adaptions are performed. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17SPI master driver for Xilinx virtexAndrei Konovalov4-0/+453
Simple SPI master driver for Xilinx SPI controller. No support for multiple masters. Not using level 1 drivers from EDK. [akpm@linux-foundation.org: uninlining] Signed-off-by: Yuri Frolov <yfrolov@ru.mvista.com> Signed-off-by: Andrei Konovalov <akonovalov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17SPI: tle620x power switch driverBen Dooks4-0/+362
Add support for the Infineon TLE62x0 series of low-side driver chips, such as the TLE6220 or TLE6230. These can be viewed as output GPIOs specialized for power switching applications. The driver provides a userspace interface to those GPIOs, and to the switch status they provide. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17S3c24xx SPI controllers both select 'bitbang'David Brownell1-1/+3
Tweak Kconfig for the S3C24XX SPI controller drivers. Both use the bitbang framework; only one previously said that. Plus in this case "select" is the right way to manage that dependency, since folk will not know up front to enable bitbang in order to even see those S3C drivers in order to enable them. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17atmel_spi: don't always deselect chip between messagesDavid Brownell1-24/+103
Update chipselect handling for atmel_spi: * Teach it how to leave chipselect active between messages; this helps various drivers work better. * Cope with at91rm0200 errata: nCS0 can't be managed with GPIOs. The MR.PCS value is now updated whenever a chipselect changes. (This requires SPI pinmux init for that controller to change, and also testing on rm9200; doesn't break at91sam9 or avr32.) * Fix minor glitches: spi_setup() must leave chipselects inactive, as must removal of the spi_device. Also tweak diagnostic messaging to be a bit more useful. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17atmel_spi: minor updatesDavid Brownell1-12/+45
Minor updates to atmel_spi: - DMA: * Comments to explain the DMA policies * Report any mapping errors from spi_transfer() * Remove extra loop for DMA mapping - Diagnostics: report minimum clock rate, if we need to reject a spi_setup() request because that rate is too low. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17spi_mpc83xx.c underclocking hotfixClifford Wolf1-0/+6
The MPC83xx SPI controller clock divider can divide the system clock by not more then 1024. The spi_mpc83xx driver does not check this and silently writes garbage to the SPI controller registers when asked to run at lower frequencies. I've tried to run the SPI on a 266MHz MPC8349E with 100kHz for debugging a bus problem and suddenly was confronted with a 2nd problem to debug.. ;-) The patch adds an additional check which avoids writing garbage to the SPI controller registers and warn the user about it. This might help others to avoid simmilar problems. Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17spi_lm70llp parport adapter driverKaiwan N Billimoria4-0/+440
This adds a driver for the LM70-LLP parport adapter, which is an eval board for the LM70 temperature sensor. For those without that board, it may be a simpler example of a parport-to-SPI adapter then spi_butterfly. Signed-off-by: Kaiwan N Billimoria <kaiwan@designergraphix.com> Doc, coding style, and interface updates; build fixes. Minor rename. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17spidev compiler warning goneDavid Brownell1-2/+4
Get rid of annoying GCC warning on 32-bit platforms. drivers/spi/spidev.c: In function 'spidev_message': drivers/spi/spidev.c:184: warning: cast to pointer from integer of different size drivers/spi/spidev.c:216: warning: cast to pointer from integer of different size The trick is to add an extra cast using "ptrdiff_t" to convert the u64 to the correct size integer, and only then casting it into a "void *" pointer. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17CRC7 supportJan Nikitenko5-1/+94
Add CRC7 routines, used for example in MMC over SPI communication. Kerneldoc updates [akpm@linux-foundation.org: fix funny mix of const and non-const] Signed-off-by: Jan Nikitenko <jan.nikitenko@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17SPI: add 3wire mode flagDavid Brownell2-0/+5
Add a new spi->mode bit: SPI_3WIRE, for chips where the SI and SO signals are shared (and which are thus only half duplex). Update the LM70 driver to require support for that hardware mode from the controller. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17SPI controller drivers: check for unsupported modesDavid Brownell10-21/+66
Minor SPI controller driver updates: make the setup() methods reject spi->mode bits they don't support, by masking aginst the inverse of bits they *do* support. This insures against misbehavior later when new mode bits get added. Most controllers can't support SPI_LSB_FIRST; more handle SPI_CS_HIGH. Support for all four SPI clock/transfer modes is routine. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17IBMASM: must depend on CONFIG_INPUTDmitry Torokhov1-1/+1
IBMASM: must depend on CONFIG_INPUT The driver registers couple of input devices and therefore must depend on CONFIG_INPUT. Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Cc: Vernon Mauery <vernux@us.ibm.com> Cc: Max Asbock <masbock@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17IBMASM: miscellaneous fixesDmitry Torokhov1-19/+18
IBMASM: miscellaneous fixes Fix some minor issues, such as: - properly set up ID of keyboard device (was mixed up with mouse) - constify translation tables - change some variables to #defines - set up input device's parent to form proper sysfs hierarchy - minor formatting changes Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Cc: Vernon Mauery <vernux@us.ibm.com> Cc: Max Asbock <masbock@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17IBMASM: dont use extern in function declarationsDmitry Torokhov1-32/+32
IBMASM: don't use extern in function declarations We normally don't use extern in function declarations located in header files. Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Cc: Vernon Mauery <vernux@us.ibm.com> Cc: Max Asbock <masbock@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17IBMASM: whitespace cleanupDmitry Torokhov14-62/+62
IBMASM: whitespace cleanup Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Cc: Vernon Mauery <vernux@us.ibm.com> Cc: Max Asbock <masbock@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17x86_64: speedup touch_nmi_watchdogAndrew Morton1-3/+5
Avoid dirtying remote cpu's memory if it already has the correct value. Cc: Andi Kleen <ak@suse.de> Cc: Konrad Rzeszutek <konrad@darnok.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17i386: speedup touch_nmi_watchdogAndrew Morton1-3/+5
Avoid dirtying remote cpu's memory if it already has the correct value. Cc: Andi Kleen <ak@suse.de> Cc: Konrad Rzeszutek <konrad@darnok.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Inhibit NMI watchdog when Alt-SysRq-T operation is underwayKonrad Rzeszutek1-0/+1
On large memory configuration with not so fast CPUs the NMI watchdog is triggered when memory addresses are being gathered and printed. The code paths for Alt-SysRq-t are sprinkled with touch_nmi_watchdog in various places but not in this routine (or in the loop that utilizes this function). The patch has been tested for regression on large CPU+memory configuration (128 logical CPUs + 224 GB) and 1,2,4,16-CPU sockets with various memory sizes (1,2,4,6,20). Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Fix sparse false positives re BUG_ON(ptr)Alexey Dobriyan1-1/+1
sparse now warns if one compares pointers with integers. However, there are false positives, like: fs/filesystems.c:72:2: warning: Using plain integer as NULL pointer Every time BUG_ON(ptr) is used, ptr is checked against integer zero. Avoid that and save ~70 false positives from allyesconfig run. mentioned by Al. Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Josh Triplett <josh@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17destroy_workqueue() can livelockOleg Nesterov1-6/+5
Pointed out by Michal Schmidt <mschmidt@redhat.com>. The bug was introduced in 2.6.22 by me. cleanup_workqueue_thread() does flush_cpu_workqueue(cwq) in a loop until ->worklist becomes empty. This is live-lockable, a re-niced caller can get CPU after wake_up() and insert a new barrier before the lower-priority cwq->thread has a chance to clear ->current_work. Change cleanup_workqueue_thread() to do flush_cpu_workqueue(cwq) only once. We can rely on the fact that run_workqueue() won't return until it flushes all works. So it is safe to call kthread_stop() after that, the "should stop" request won't be noticed until run_workqueue() returns. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Michal Schmidt <mschmidt@redhat.com> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Kprobes on select architectures no longer EXPERIMENTALAnanth N Mavinakayanahalli4-8/+8
Based on usage and testing over the past couple of years, kprobes on i386, ia64, powerpc and x86_64 is no longer EXPERIMENTAL. This is a follow-up to Robert P.J. Day's patch making "Instrumentation support" non-EXPERIMENTAL: http://marc.info/?l=linux-kernel&m=118396955423812&w=2 Arch maintainers for sparc64, avr32 and s390 need to take a similar call. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Andi Kleen <ak@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17make timespec_equal() take const argumentsJan Engelhardt1-1/+2
Make arguments of timespec_equal() const struct timespec. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17kallsyms: make KSYM_NAME_LEN include space for trailing '\0'Tejun Heo11-27/+27
KSYM_NAME_LEN is peculiar in that it does not include the space for the trailing '\0', forcing all users to use KSYM_NAME_LEN + 1 when allocating buffer. This is nonsense and error-prone. Moreover, when the caller forgets that it's very likely to subtly bite back by corrupting the stack because the last position of the buffer is always cleared to zero. This patch increments KSYM_NAME_LEN by one and updates code accordingly. * off-by-one bug in asm-powerpc/kprobes.h::kprobe_lookup_name() macro is fixed. * Where MODULE_NAME_LEN and KSYM_NAME_LEN were used together, MODULE_NAME_LEN was treated as if it didn't include space for the trailing '\0'. Fix it. Signed-off-by: Tejun Heo <htejun@gmail.com> Acked-by: Paulo Marques <pmarques@grupopie.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17sb1250-duart.c: SB1250 DUART serial supportMaciej W. Rozycki9-45/+1074
This is a driver for the SB1250 DUART, a dual serial port implementation included in the Broadcom family of SOCs descending from the SiByte SB1250 MIPS64 chip multiprocessor. It is a new implementation replacing the old-fashioned driver currently present in the linux-mips.org tree. It supports all the usual features one would expect from a(n asynchronous) serial driver, including modem line control (as far as hardware supports it -- there is edge detection logic missing from the DCD and RI lines and the driver does not implement polling of these lines at the moment), the serial console, BREAK transmission and reception, including the magic SysRq. The receive FIFO threshold is not maintained though. The driver was tested with a SWARM board which uses a BCM1250 SOC (which is dual MIPS64 CMP) and has both ports of the single DUART implemented wired externally. Both were tested. Testing included using the ports as terminal lines at 1200bps (which is the ports minimum), 115200bps and a couple of random speeds inbetween. The modem lines were verified to operate correctly. No testing was performed with a use as a network interface, like with SLIP or PPP. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> 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>
2007-07-17Remove CHILD_MAXRoland McGrath1-1/+0
The CHILD_MAX macro in limits.h should not be there. It claims to be the limit on processes a user can own, but its value is wrong for that. There is no constant value, but a variable resource limit (RLIMIT_NPROC). Nothing in the kernel uses CHILD_MAX. The proper thing to do according to POSIX is not to define CHILD_MAX at all. The sysconf (_SC_CHILD_MAX) implementation works by calling getrlimit. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17Remove OPEN_MAXRoland McGrath1-1/+0
The OPEN_MAX macro in limits.h should not be there. It claims to be the limit on file descriptors in a process, but its value is wrong for that. There is no constant value, but a variable resource limit (RLIMIT_NOFILE). Nothing in the kernel uses OPEN_MAX except things that are wrong to do so. I've submitted other patches to remove those uses. The proper thing to do according to POSIX is not to define OPEN_MAX at all. The sysconf (_SC_OPEN_MAX) implementation works by calling getrlimit. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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