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* drivers/s390: cdev lock_kernel() pushdownJonathan Corbet2008-06-204-14/+41
| | | | Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* [S390] tape: Use ccw_dev_id to build cdev_id.Cornelia Huck2008-05-151-26/+5
| | | | | | | | To construct the integer containing the information from the bus_id, it is easier to use the data from ccw_dev_id than to parse the bus_id. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmlogrdr: module initialization function should return negative errorsMarcin Slusarz2008-05-151-1/+1
| | | | | Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] tty3270: fix put_char fail/success conversion.Heiko Carstens2008-05-071-9/+6
| | | | | | | | | | | | | The wrong function got coverted ;) CC drivers/s390/char/tty3270.o drivers/s390/char/tty3270.c:1747: warning: initialization from incompatible pointer type Acked-by: Alan Cox <alan@redhat.com> Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds2008-04-301-1/+16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] Update default configuration. [S390] use generic sys_ptrace [S390] Remove self ptrace IEEE_IP hack. [S390] Convert to SPARSEMEM & SPARSEMEM_VMEMMAP [S390] System z large page support. [S390] Convert machine feature detection code to C. [S390] vmemmap: use clear_table to initialise page tables. [S390] Move stfl to system.h and delete duplicated version. [S390] uaccess_mvcos: #ifdef config dependent code. [S390] cpu topology: Fix possible deadlock. [S390] Add topology_core_siblings to topology.h [S390] cio: Make isc handling more robust. [S390] remove -traditional [S390] Automatically detect added cpus. [S390] smp: Fix locking order. [S390] Add missing ifndef/define to include/asm-s390/sysinfo.h. [S390] Move show_regs to traps.c. [S390] cio: Use strict_strtoul() for attributes.
| * [S390] Automatically detect added cpus.Heiko Carstens2008-04-301-1/+16
| | | | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390 tty: Prepare for put_char to return success/failAlan Cox2008-04-304-6/+12
|/ | | | | | | | | | | | | Put the changes into the drivers first. This will still compile/work but produce a warning if bisected so can still be debugged Signed-off-by: Alan Cox <alan@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* s390: use non-racy method for proc entries creationDenis V. Lunev2008-04-291-4/+3
| | | | | | | | | | | | | Use proc_create() to make sure that ->proc_fops be setup before gluing PDE to main tree. Signed-off-by: Denis V. Lunev <den@openvz.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc: remove proc_root from driversAlexey Dobriyan2008-04-291-2/+2
| | | | | | | | | | | | Remove proc_root export. Creation and removal works well if parent PDE is supplied as NULL -- it worked always that way. So, one useless export removed and consistency added, some drivers created PDEs with &proc_root as parent but removed them as NULL and so on. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] Remove code duplication from monreader / dcssblk.Martin Schwidefsky2008-04-171-52/+2
| | | | | | | | Move the function that prints the segment warning messages found in the monreader driver and the dcssblk driver to the extmem base code. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-173-4/+4
| | | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] vmur: Use wait queue instead of mutex to serialize openFrank Munzert2008-04-172-8/+20
| | | | | | | | | | | | If user space opens a unit record device node then vmur is leaving the kernel with lock open_mutex still held to prevent other processes from opening the device simultaneously. This causes lockdep to complain about a lock held when returning to user space. Now the mutex is replaced by a wait queue to serialize device open. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] tape: duplicate sysfs filename when setting tape device onlineMichael Holzheu2008-04-173-6/+5
| | | | | | | | | | | | | | | When a tape device is set online, offline and online again, the following error message is printed on the console: "sysfs: duplicate filename 'non-rewinding' can not be created". The reason is that when setting a device online, the tape driver creates a sysfs symlink from the tape device to the tape class device. Unfortunately the symlink is not removed correctly, when the device is set offline. Instead of passing the tape device object to sysfs_remove_link, the class device object is used. This patch fixes this problem and uses the correct tape device object now. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] sclp: Get rid of in_atomic() use.Heiko Carstens2008-04-172-8/+7
| | | | | | | | | | Reintroduces in_interrupt() check in sclp_tty code. Add may_schedule parameter to vt220 write function, so we can let the write function know if it may schedule or not. So we disallow scheduling for all console calls and may allow them for tty calls. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] sclp_vt220: speed up console output for interactive workChristian Borntraeger2008-03-051-1/+1
| | | | | | | | | | Currently an output buffer can wait up to HZ/2 until the buffer is flushed. The wait time is noticeable in interactive tools like mc. Change the value to HZ/20, which seems enough for interactive work. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Build fix for drivers/s390/char/defkeymap.cTony Breeds2008-03-041-1/+1
| | | | | | | | | | | | | | | Commit 5ce2087ed0eb424e0889bdc9102727f65d2ecdde (Fix default compose table initialization) left a trailing quote. CC drivers/s390/char/defkeymap.o drivers/s390/char/defkeymap.c:155: error: missing terminating ' character drivers/s390/char/defkeymap.c:156: error: syntax error before ';' token make[3]: *** [drivers/s390/char/defkeymap.o] Error 1 Fix that. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix default compose table initializationSamuel Thibault2008-03-031-2/+2
| | | | | | | | | Oddly enough, unsigned int c = '\300'; puts a "negative" value in c, not 0300... This fixes the default unicode compose table by using integers instead of character constants. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] sclp: clean up send/receive naming schemePeter Oberparleiter2008-02-196-13/+15
| | | | | | | | | Make state change events adjust the correct mask by cleaning up naming inconsistencies. Also remove chance for lockup by removing unnecessary mask related check before reading events. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp_vt220: Fix vt220 initializationChristian Borntraeger2008-02-091-13/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are two problems in the vt220 intialization: o Currently the vt220 console looses early printk events until the the vt220 tty is registered. o console should work if tty_register fails sclp_vt220_con_init calls __sclp_vt220_init and register_console. It does not register the driver with the sclp core code via sclp_register. That results in an sclp_send_mask=0. Therefore, __sclp_vt220_emit will reject buffers with EIO. Unfortunately register_console will cause the printk buffer to be sent to the console and, therefore, every early message gets dropped. The sclp_send_mask is set later during boot, when sclp_vt220_tty_init calls sclp_register. The solution is to move the sclp_register call from sclp_vt220_tty_init to __sclp_vt220_init. This makes sure that the console is properly registered with the sclp subsystem before the first log buffer messages are passed to the vt220 console. We also adopt the cleanup on error to keep the console alive if tty_register fails. Thanks to Peter Oberparleiter and Heiko Carstens for review and ideas for improvement. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp_tty/sclp_vt220: Fix scheduling while atomicChristian Borntraeger2008-02-052-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Under load the following bug message appeared while using sysrq-t: BUG: scheduling while atomic: bash/3662/0x00000004 0000000000105b74 000000003ba17740 0000000000000002 0000000000000000 000000003ba177e0 000000003ba17758 000000003ba17758 0000000000105bfe 0000000000817ba8 000000003f2a5350 0000000000000000 0000000000000000 000000003ba17740 000000000000000c 000000003ba17740 000000003ba177b0 0000000000568630 0000000000105bfe 000000003ba17740 000000003ba17790 Call Trace: ([<0000000000105b74>] show_trace+0x13c/0x158) [<0000000000105c58>] show_stack+0xc8/0xfc [<0000000000105cbc>] dump_stack+0x30/0x40 [<000000000012a0c8>] __schedule_bug+0x84/0x94 [<000000000056234e>] schedule+0x5ea/0x970 [<0000000000477cd2>] __sclp_vt220_write+0x1f6/0x3ec [<0000000000477f00>] sclp_vt220_con_write+0x38/0x48 [<0000000000130b4a>] __call_console_drivers+0xbe/0xd8 [<0000000000130bf0>] _call_console_drivers+0x8c/0xd0 [<0000000000130eea>] release_console_sem+0x1a6/0x2fc [<0000000000131786>] vprintk+0x262/0x480 [<00000000001319fa>] printk+0x56/0x68 [<0000000000125aaa>] print_cfs_rq+0x45e/0x4a4 [<000000000012614e>] sched_debug_show+0x65e/0xee8 [<000000000012a8fc>] show_state_filter+0x1cc/0x1f0 [<000000000044d39c>] sysrq_handle_showstate+0x2c/0x3c [<000000000044d1fe>] __handle_sysrq+0xae/0x18c [<00000000002001f2>] write_sysrq_trigger+0x8a/0x90 [<00000000001f7862>] proc_reg_write+0x9a/0xc4 [<00000000001a83d4>] vfs_write+0xb8/0x174 [<00000000001a8b88>] sys_write+0x58/0x8c [<0000000000112e7c>] sysc_noemu+0x10/0x16 [<0000020000116f68>] 0x20000116f68 The problem seems to be, that with a full console buffer, release_console_sem disables interrupts with spin_lock_irqsave and then calls the console function without enabling interrupts. __sclp_vt220_write checks for in_interrupt, to decide if it can schedule. It should check for in_atomic instead. The same is true for sclp_tty.c. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* blk_end_request: changing s390 (take 4)Kiyoshi Ueda2008-01-281-7/+6
| | | | | | | | | | | | | | | | This patch converts s390 to use blk_end_request interfaces. Related 'uptodate' arguments are converted to 'error'. As a result, the interfaces of internal functions below are changed: o dasd_end_request o tapeblock_end_request Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [S390] constify function pointer tables.Jan Engelhardt2008-01-263-3/+3
| | | | | Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] drivers/s390/: Spelling fixesJoe Perches2008-01-262-2/+2
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] use LIST_HEAD instead of LIST_HEAD_INITDenis Cheng2008-01-262-3/+3
| | | | | | | | | single list_head variable initialized with LIST_HEAD_INIT could almost always can be replaced with LIST_HEAD declaration, this shrinks the code and looks better. Signed-off-by: Denis Cheng <crquan@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] drivers/s390: Add missing "space"Joe Perches2008-01-262-2/+2
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Get rid of additional_cpus kernel parameter.Heiko Carstens2008-01-261-44/+2
| | | | | | | | | It caused only a lot of confusion. From now on cpu hotplug of up to NR_CPUS will work by default. If somebody wants to limit that then the possible_cpus parameter can be used. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: convert channel path configure code to use sync interface.Heiko Carstens2008-01-263-202/+123
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Standby cpu activation/deactivation.Heiko Carstens2008-01-264-119/+322
| | | | | | | | | | | | | | | | | | | | | | | Add a new interface so that cpus can be put into standby state and configured state. Only offline cpus can be put into standby state or configured state. For that the new percpu sysfs attribute "configure" must be used. To put a cpu in standby state a "0" must be written to the attribute. In order to switch it into configured state a "1" must be written to the attribute. Only cpus in configured state can be brought online. In addition this patch introduces a static mapping of physical to logical cpus. As a result only the sysfs directories of present cpus will be created. To scan for new cpus the new sysfs attribute "rescan" must be used. Writing to /sys/devices/system/cpu/rescan will trigger a rescan of cpus and will create directories for new cpus. On IPL only configured cpus will be used. And on reboot/shutdown all cpus will remain in their current state (configured/standby). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: sysfs interface for SCLP cpiMichael Ernst2008-01-264-231/+432
| | | | | Signed-off-by: Michael Ernst <mernst@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()Gautham R Shenoy2008-01-251-2/+2
| | | | | | | | | | | | | | | | | Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use get_online_cpus and put_online_cpus instead as it highlights the refcount semantics in these operations. The new API guarantees protection against the cpu-hotplug operation, but it doesn't guarantee serialized access to any of the local data structures. Hence the changes needs to be reviewed. In case of pseries_add_processor/pseries_remove_processor, use cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the cpu_present_map there. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* [S390] struct class_device -> struct device conversion.Cornelia Huck2007-10-224-38/+26
| | | | | | | | Convert struct class_device users under drivers/s390/char to use struct device. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Fix misspellings of "system", "controller", "interrupt" and "necessary".Robert P. J. Day2007-10-191-1/+1
| | | | | | | | Fix the various misspellings of "system", controller", "interrupt" and "[un]necessary". Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* unicode diacritics supportSamuel Thibault2007-10-173-14/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There have been issues with non-latin1 diacritics and unicode. http://bugzilla.kernel.org/show_bug.cgi?id=7746 Git 759448f459234bfcf34b82471f0dba77a9aca498 `Kernel utf-8 handling' partly resolved it by adding conversion between diacritics and unicode. The patch below goes further by just turning diacritics into unicode, hence providing better future support. The kbd support can be fetched from http://bugzilla.kernel.org/attachment.cgi?id=12313 This was tested in all of latin1, latin9, latin2 and unicode with french and czech dead keys. Turn the kernel accent_table into unicode, and extend ioctls KDGKBDIACR and KDSKBDIACR into their equivalents KDGKBDIACRUC and KDSKBDIACR. New function int conv_uni_to_8bit(u32 uni) for converting unicode into 8bit _input_. No, we don't want to store the translation, as it is potentially sparse and large. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Jan Engelhardt <jengelh@gmx.de> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] 3215: Handle special console device.Cornelia Huck2007-10-121-0/+3
| | | | | | | | | | The early console device is special as it already has all needed data set and raw3215[0] allocated from con3215_init(). Therefore, it needs special treatment in the probe function so it can be matched with the 3215 driver which is already owning it. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmwatchdog: fix broken inline assembly.Heiko Carstens2007-10-121-2/+2
| | | | | | | | Constraint for err is wrong since it is preinitialized and the code relies on it in case of an exception. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] tape: Fix medium state handlingMichael Holzheu2007-10-121-9/+17
| | | | | | | | | | | Currently there are situations, where the tape medium state (loaded, unloaded, unknown) is not set correctly. The reason is that the medium association field is used to determine the medium state. This not always leads to correct results. To fix that we use another field of the medium sense data instead. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] zcore: fix inline assembly in memcpy_real()Michael Holzheu2007-10-121-3/+4
| | | | | | | | | | | memcpy_real uses the mvcle instruction. This instruction alters all used registers (source, destination and 2 x count). Therefore we have to flag those registers as input/output registers (+d). In addition to that, we have to specify, that we read from memory designated by "src" and write to memory designated by "dest". Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Get rid of a bunch of sparse warnings again.Heiko Carstens2007-10-124-8/+25
| | | | | | | Also removes a bunch of ^L in drivers/s390/cio/cmf.c Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Fixup rq_for_each_segment() indentationJens Axboe2007-10-102-22/+20
| | | | | | Remove one level of nesting where appropriate. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Introduce rq_for_each_segment replacing rq_for_each_bioNeilBrown2007-10-102-20/+11
| | | | | | | | | | | | | | | Every usage of rq_for_each_bio wraps a usage of bio_for_each_segment, so these can be combined into rq_for_each_segment. We define "struct req_iterator" to hold the 'bio' and 'index' that are needed for the double iteration. Signed-off-by: Neil Brown <neilb@suse.de> Various compile fixes by me... Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [S390] vmur: fix reference counting for vmur device structureMichael Holzheu2007-08-222-58/+161
| | | | | | | | | | | | | | When a vmur device is removed due to a detach of the device, currently the ur device structure is freed. Unfortunately it can happen, that there is still a user of the device structure, when the character device is open during the detach process. To fix this, reference counting for the vmur structure is introduced. In addition to that, the online, offline, probe and remove functions are serialized now using a global mutex. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] vmur: fix diag14 exceptions with addresses > 2GB.Michael Holzheu2007-08-222-28/+5
| | | | | | | | | | | | | There are several s390 diagnose calls, which must be executed below the 2GB memory boundary. In order to enforce this, those diagnoses must be compiled into the kernel. Currently diag 14 can be called within the vmur kernel module from addresses above 2GB. This leads to specification exceptions. This patch moves diag10, diag14 and diag210 into the new diag.c file. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] monwriter: Serialization bug for multithreaded applications.Melissa Howland2007-08-101-0/+6
| | | | | | | | Locking added so that multithreaded applications can now do writes from different threads without the risk of storage corruption. Signed-off-by: Melissa Howland <melissah@us.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: diag14 only works with buffers below 2GBMichael Holzheu2007-08-101-36/+70
| | | | | | | | | If memory buffers above 2GB are used, diagnose 14 raises a specification exception. This fix ensures that buffer allocation is done below the 2GB boundary. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: add "top of queue" sanity check for reader openMichael Holzheu2007-08-102-1/+7
| | | | | | | | | | | If the z/VM reader is already open, it can happen that after opening the Linux reader device, not the topmost file is processed. According the semantics of the Linux z/VM unit record device driver, always the topmost file has to be processed. With this fix an error is returned if that is not the case. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: reject open on z/VM reader files with status HOLDMichael Holzheu2007-08-102-2/+6
| | | | | | | | | | If a reader file with HOLD status is at the top of the reader queue, currently all read requests will return data of the second file in the queue. But the semantics of vmur is that always the topmost file is read. With this fix -EPERM is returned on open, if the topmost reader file is in HOLD status. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: use DECLARE_COMPLETION_ONSTACK to keep lockdep happyHeiko Carstens2007-08-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. 000000000ff9fb08 000000000ff9fb18 0000000000000002 0000000000000000 000000000ff9fbb8 000000000ff9fb30 000000000ff9fb30 0000000000104198 0000000000000000 0000000000000002 0000000000000000 0000000000000000 000000000ff9fb18 000000000000000c 000000000ff9fb18 000000000ff9fb88 0000000000448db0 0000000000104198 000000000ff9fb18 000000000ff9fb68 Call Trace: ([<00000000001040ea>] show_trace+0x12e/0x170) [<00000000001041f2>] show_stack+0xc6/0xf8 [<0000000000104252>] dump_stack+0x2e/0x3c [<0000000000155f9c>] __lock_acquire+0x460/0x1048 [<0000000000156c16>] lock_acquire+0x92/0xb8 [<000000000043f406>] _spin_lock_irqsave+0x62/0x80 [<0000000000121382>] complete+0x32/0x78 [<000000001082b468>] ur_int_handler+0xc8/0xec [vmur] [<0000000000313216>] ccw_device_call_handler+0xae/0xd4 [<0000000000310da4>] ccw_device_irq+0x5c/0x130 [<0000000000312c84>] io_subchannel_irq+0x8c/0x118 [<000000000030a88c>] do_IRQ+0x16c/0x194 [<0000000000111a62>] io_no_vtime+0x16/0x1c [<0000000080001394>] 0x80001394 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: allocate single record buffers instead of one big data bufferMichael Holzheu2007-08-101-38/+37
| | | | | | | | | | vmur allocates one contiguous kernel buffer to copy user data when creating ccw programs for punch or printer. If big block sizes are used, under memory pressure it can happen, that we do not get memory in one chunk. Now we allocate memory for each single record to avoid high order allocations. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Fix sclp_vt220 error handling.Heiko Carstens2007-07-271-21/+40
| | | | | | | | Also convert to slab_is_available() as an indicator if get_zeroed_page() will work or not. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: fix diag14_read.Frank Munzert2007-07-271-1/+1
| | | | | | | Record length of spool file must be only stored in 1st SPLINK record Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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