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* pcmcia: move unbind/rebind into dev_pm_ops.completeChristian Lamparter2013-02-211-7/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the device rebind procedures for cardbus devices from the pm.resume into the pm.complete callback. The reason for moving the code is: "[...] The PM code needs to send suspend and resume messages to every device in the right order, and it can't do that if new devices are being added at the same time. [...]" However the situation really isn't quite that rigid. In particular, adding new children during a resume callback shouldn't cause much of problem because the children don't need to be resumed anyway (since they were never suspended). On the other hand, if you do it you will get a dev_warn() from the PM core, something like 'parent should not be sleeping'. Still, it is considered bad form and should be avoided if possible." (Alan Stern's full comment about the topic can be found here: <https://lkml.org/lkml/2012/7/10/254>) Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Greg KH <greg@kroah.com> Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Remove all #inclusions of asm/system.hDavid Howells2012-03-281-1/+0
| | | | | | | | | Remove all #inclusions of asm/system.h preparatory to splitting and killing it. Performed with the following command: perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *` Signed-off-by: David Howells <dhowells@redhat.com>
* pcmcia: fix unused function compile warningMaciej Żenczykowski2010-10-141-1/+1
| | | | | | | | | | pcmcia_socket_dev_resume() is only referenced from macro SET_SYSTEM_SLEEP_PM_OPS(NULL, pcmcia_socket_dev_resume) which based on CONFIG_PM_SLEEP may or may not actually use its second parameter. Signed-off-by: Maciej Żenczykowski <zenczykowski@gmail.com> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: convert pcmcia_request_configuration to pcmcia_enable_deviceDominik Brodowski2010-09-291-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | pcmcia_enable_device() now replaces pcmcia_request_configuration(). Instead of config_req_t, all necessary flags are either passed as a parameter to pcmcia_enable_device(), or (in rare circumstances) set in struct pcmcia_device -> flags. With the last remaining user of include/pcmcia/cs.h gone, remove all references. CC: netdev@vger.kernel.org CC: linux-wireless@vger.kernel.org CC: linux-ide@vger.kernel.org CC: linux-usb@vger.kernel.org CC: laforge@gnumonks.org CC: linux-mtd@lists.infradead.org CC: alsa-devel@alsa-project.org CC: linux-serial@vger.kernel.org CC: Jiri Kosina <jkosina@suse.cz> CC: linux-scsi@vger.kernel.org Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> (for drivers/bluetooth) Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: remove cs_types.hDominik Brodowski2010-07-301-1/+0
| | | | | | | | | | | | | | | | Remove cs_types.h which is no longer needed: Most definitions aren't used at all, a few can be made away with, and two remaining definitions (typedefs, unfortunatley) may be moved to more specific places. CC: linux-ide@vger.kernel.org CC: linux-usb@vger.kernel.org CC: laforge@gnumonks.org CC: linux-mtd@lists.infradead.org CC: alsa-devel@alsa-project.org CC: linux-serial@vger.kernel.org Acked-by: Marcel Holtmann <marcel@holtmann.org> (for drivers/bluetooth/) Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: split up central event handlerDominik Brodowski2010-07-301-29/+7
| | | | | | | Split up the central event handler for 16bit cards into three individual functions. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: simplify event callbackDominik Brodowski2010-07-301-34/+10
| | | | | | | | | The event callback for handling 16bit PCMCIA cards only needs to be informed about a few events. Furthermore, send_event may already only be called with skt->skt_mutex held, which also protects against the module being removed behind the callback's back. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: replace struct irq with uint pcmcia_irq in struct pcmcia_socketDominik Brodowski2010-05-101-1/+0
| | | | | | | As we don't need the "Config" counter any more, we can simplify struct pcmcia_socket. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: order userspace suspend and resume requestsDominik Brodowski2010-05-041-7/+9
| | | | | | | | | Assert that userspace suspend and resume requests appearing (almost) immediately are executed in the following order: suspend, resume. This should result in "pccardctl reset" behaving the same as before. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: use dev_pm_ops for class pcmcia_socket_classDominik Brodowski2010-03-241-61/+63
| | | | | | | | | | | | Instead of requiring PCMCIA socket drivers to call various functions during their (bus) resume and suspend functions, register an own dev_pm_ops for this class. This fixes several suspend/resume bugs seen on db1xxx-ss, and probably on some other socket drivers, too. With regard to the asymmetry with only _noirq suspend, but split up resume, please see bug 14334 and commit 9905d1b411946fb3 . Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: remove useless msleep in ds.cDominik Brodowski2010-02-171-0/+3
| | | | | | | | | As this is the socket thread (pccardd) starting up, we do not have anything to wait for in ds.c. Instead, wait the same amount of time in pccardd to allow userspace to catch up and - possibly - execute pcmcia-socket-startup. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: avoid sysfs-related lockup for cardbusDominik Brodowski2010-02-171-2/+10
| | | | | | | | | In cb_free(), we remove some sysfs files -- other sysfs files might grab ops_mutex, so we cannot hold it while removing sysfs files. This fixes http://lkml.org/lkml/2010/1/17/88 . Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: delay re-scanning and re-querying of PCMCIA busDominik Brodowski2010-02-171-1/+7
| | | | | | | | | After a CIS update -- or the finalization of the resource database --, proceed with the re-scanning or re-querying of PCMCIA cards only in a separate thread to avoid deadlocks. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: use pccardd to handle eject, insert, suspend and resume requestsDominik Brodowski2010-02-171-119/+58
| | | | | | | | | This avoids any sysfs-related deadlock (or lockdep warning), such as reported at http://lkml.org/lkml/2010/1/17/88 . Reported-by: Ming Lei <tom.leiming@gmail.com> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: use ops_mutex for rsrc_{mgr,nonstatic} lockingDominik Brodowski2010-02-171-1/+6
| | | | | Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: simplify lockingDominik Brodowski2010-02-171-2/+0
| | | | | | | | | replace pcmcia_socket->lock and pcmcia_dev_list_lock by using the per-socket "ops_mutex", as we do neither need different locks nor a spinlock here. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: lock ops->set_socketDominik Brodowski2010-02-171-2/+16
| | | | | | | | | | | As a side effect, socket_state_t socket; u_int state; u_int suspended_state; are properly protected now. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: add locking to set_mem_map()Dominik Brodowski2010-02-171-0/+1
| | | | | | | | | | | | | Protect the pccard_operations callback "set_mem_map" by a new mutex ops_mutex. This mutex also protects the following values in struct pcmcia_socket: pccard_mem_map win[] pccard_mem_map cis_mem void __iomem *cis_virt Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: remove useless indirectionDominik Brodowski2010-01-241-1/+2
| | | | | | | | As release_resoure_db() used to be called only from one place, and it's a two-line function, remove it. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: do not lock socket driver module on card insertDominik Brodowski2010-01-241-3/+10
| | | | | | | | Do not lock the socket driver module on card insert, as the PCMCIA core can handle a socket module removal, at least if we add a call to socket_remove() on pccardd()'s shutdown. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: do not lock socket driver module in pcmcia_get_socket()Dominik Brodowski2010-01-171-7/+1
| | | | | | | | | | Do not lock the socket driver module in pcmcia_get_socket(), as the PCMCIA core can handle a socket module removal: In pcmcia_unregister_socket(), we explicitely wait for the last put_device() to succeed. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: call CIS cleanup from ds.cDominik Brodowski2010-01-171-3/+0
| | | | | | | As ds.c is the only real user of CIS access functions, call the cleanup functions from ds.c, too. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: improve check for same card in slot after resumeDominik Brodowski2010-01-171-35/+30
| | | | | | | | | | | | | | | | | | During a suspend/resume cycle, an user may change the card in the PCMCIA/CardBus slot. The pcmcia_core can at least look at the socket state to check whether it is the same. For PCMCIA devices, move the detection and handling of such a change to ds.c. For CardBus devices, the PCI hotplug interface doesn't offer a "rescan" facility which also _removes_ devices no longer to be found behind a bridge. Therefore, remove and re-add all devices unconditionally. CC: Jesse Barnes <jbarnes@virtuousgeek.org> CC: Linus Torvalds <torvalds@linux-foundation.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: validate CIS, not CIS cache.Dominik Brodowski2010-01-171-0/+4
| | | | | | | | | | | In pccard_validate_cis(), validate the card CIS, not the CIS cache. Also, destroy the CIS cache if pccard_validate_cis fails. Furthermore, do not remove the fake CIS in destroy_cis_cache() but do so explicitely in the code paths where it makes sense. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: CodingStyle fixesDominik Brodowski2009-12-071-6/+6
| | | | | | | | | | Fix several CodingStyle issues in drivers/pcmcia/ . checkpatch.pl no longer reports errors in the PCMCIA core. The remaining warnings mostly relate to wrong indent -- PCMCIA historically used 4 spaces --, to lines over 80 characters and to hundreds of typedefs. The cleanup of those will follow in the future. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6Linus Torvalds2009-12-051-33/+34
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6: (50 commits) pcmcia: rework the irq_req_t typedef pcmcia: remove deprecated handle_to_dev() macro pcmcia: pcmcia_request_window() doesn't need a pointer to a pointer pcmcia: remove unused "window_t" typedef pcmcia: move some window-related code to pcmcia_ioctl.c pcmcia: Change window_handle_t logic to unsigned long pcmcia: Pass struct pcmcia_socket to pcmcia_get_mem_page() pcmcia: Pass struct pcmcia_device to pcmcia_map_mem_page() pcmcia: Pass struct pcmcia_device to pcmcia_release_window() drivers/pcmcia: remove unnecessary kzalloc pcmcia: correct handling for Zoomed Video registers in topic.h pcmcia: fix printk formats pcmcia: autoload module pcmcia pcmcia/staging: update comedi drivers PCMCIA: stop duplicating pci_irq in soc_pcmcia_socket PCMCIA: ss: allow PCI IRQs > 255 PCMCIA: soc_common: remove 'dev' member from soc_pcmcia_socket PCMCIA: soc_common: constify soc_pcmcia_socket ops member PCMCIA: sa1111: remove duplicated initializers PCMCIA: sa1111: wrap soc_pcmcia_socket to contain sa1111 specific data ...
| * pcmcia: autoload module pcmciaDominik Brodowski2009-11-091-0/+7
| | | | | | | | | | | | | | | | | | | | | | Attempt to load the "pcmcia" module for 16-bit PCMCIA cards, so that PCMCIA support becomes available without pcmciautils/udev userspace interaction. Based on a suggestion and a patch Signed-off-by: Komuro <komurojun-mbn@nifty.com> but converted it to request_module_nowait() and move it to a later stage. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
| * pcmcia: extend error reporting and debug messages in coreDominik Brodowski2009-11-081-0/+3
| | | | | | | | | | | | Add a few more error and debug messages to the PCMCIA core. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
| * pcmcia: use dynamic debug instead of custom infrastructureDominik Brodowski2009-11-081-33/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | Use the generic "dynamic debug" infrastructure instead of CONIG_PCMCIA_DEBUG in the PCMCIA core (pcmcia.ko and pcmcia_core.ko). To enable debugging, enable CONFIG_DYNAMIC_DEBUG, mount debugfs and $ echo -n 'module pcmcia_core +p' > /sys/kernel/debug/dynamic_debug/control for the complete module "pcmcia_core", for example. For more detailled instructions, please see Documentation/dynamic-debug-howto.txt Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* | PM / yenta: Split resume into early and late parts (rev. 4)Rafael J. Wysocki2009-11-031-26/+43
|/ | | | | | | | | | | | | | | | | | | | Commit 0c570cdeb8fdfcb354a3e9cd81bfc6a09c19de0c (PM / yenta: Fix cardbus suspend/resume regression) caused resume to fail on systems with two CardBus bridges. While the exact nature of the failure is not known at the moment, it can be worked around by splitting the yenta resume into an early part, executed during the early phase of resume, that will only resume the socket and power it up if there was a card in it during suspend, and a late part, executed during "regular" resume, that will carry out all of the remaining yenta resume operations. Fixes http://bugzilla.kernel.org/show_bug.cgi?id=14334, which is a listed regression from 2.6.31. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Reported-by: Stephen J. Gowdy <gowdy@cern.ch> Tested-by: Jose Marino <braket@hotmail.com>
* PM / PCMCIA: Drop second argument of pcmcia_socket_dev_suspend()Rafael J. Wysocki2009-09-291-1/+1
| | | | | | | | | | pcmcia_socket_dev_suspend() doesn't use its second argument, so it may be dropped safely. This change is necessary for the subsequent yenta suspend/resume fix. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: stable@kernel.org
* pcmcia: ensure correct logging in do_io_probeDominik Brodowski2008-11-091-6/+6
| | | | Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2008-11-021-1/+1
| | | | | | Signed-Off-By: Kay Sievers <kay.sievers@vrfy.org> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: card services header cleanupDominik Brodowski2008-08-311-2/+2
| | | | | | | 16-bit PCMCIA device handling function definitions are moved to ds.h, internal definitions to cs_internal.h. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: deprecate CS_BAD_ATTRIBUTE, CS_BAD_TYPE and CS_BAD_PAGEDominik Brodowski2008-08-231-3/+3
| | | | | | | | | | | CS_BAD_TYPE was only used in cs.c and already properly annotated by error messages. CS_BAD_ATTRIBUTE and CS_BAD_PAGE mean a badly written driver, so ds_dbg() output and -EINVAL seems to be enough. (includes bugfix from and Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> ) Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: deprecate CS_IN_USEDominik Brodowski2008-08-231-3/+3
| | | | | | | | If a resource is already in use, mark it with -EBUSY. Same for cards already asleep. (includes a fix for a bug found by Larry Finger -- thanks!) Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: deprecate CS_GENERAL_FAILUREDominik Brodowski2008-08-231-2/+2
| | | | | | It's only used by pcmcia_core when socket-related queries time out. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: deprecate CS_NO_CARDDominik Brodowski2008-08-231-8/+8
| | | | | | It means that no card can be detected in the socket, so return -ENODEV Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: deprecate CS_UNSUPPORTED_*Dominik Brodowski2008-08-231-3/+3
| | | | | | | CS_UNSUPPORTED_MODE and CS_UNSUPPORTED_FUNCTION were mostly used to denote trying to use PCMCIA functions on CardBus cards. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: deprecate CS_SUCCESSDominik Brodowski2008-08-231-7/+7
| | | | | | | | | Instead of using own error or success codes, the PCMCIA code should rely on the generic return values. Therefore, replace all occurrences of CS_SUCCESS with 0. CC: netdev@vger.kernel.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: don't add extra DEBUG cflagDominik Brodowski2008-08-231-1/+1
| | | | | | | | | | | | Use CONFIG_PCMCIA_DEBUG instead of DEBUG so that dev_dbg() and other tricks work properly. (includes bugfixes from and Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> ) Signed-off-by: Dominik Broodwski <linux@dominikbrodowski.net>
* pcmcia: use dev_printk in module pcmcia_coreDominik Brodowski2008-08-231-8/+12
| | | | Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: kill IN_CARD_SERVICESAdrian Bunk2008-06-241-1/+0
| | | | | | | IN_CARD_SERVICES was #define'd but not used, so let's remove it. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: remove unused bulkmem.hMagnus Damm2008-06-241-1/+0
| | | | | | | | | | The code in include/pcmcia/bulkmem.h was only kept for compatibility reasons. Therefore, move the remaining region_info_t definition to ds.h [linux@dominikbrodowski.net: do not modify the IOCTL, move definition to ds.h, and update changelog] Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: cs: kill thread_waitChristoph Hellwig2008-06-241-9/+3
| | | | | | | | | | | There is not reason to have a waitqueue if it's always the same thread that is waiting for it. Just use wake_up_process instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Small modification: Also remove unused variable. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* pcmcia: remove pccard_sysfs_interface warningsDavid Brownell2008-04-301-8/+5
| | | | | | | | | | | | | Make the PCMCIA core stop using class_interface to hide socket attribute registration. This removes the associated section mismatch warnings, and helps get to the point where that mechanism can finally be removed. Simplify that attribute registration by using an attribute_group. This is a net shrink in object size. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pcmcia: fix kernel-doc commentsRandy Dunlap2007-12-101-3/+5
| | | | | | | | | | | | | | | | Fix kernel-doc comments in drivers/pcmcia/: - ti113x.h does not contain kernel-doc, so don't use /** to begin a doc comment - yenta_socket.c: remove /** on non-kernel-doc comments; escape the ':' in an "http:" comment so that it won't be treated as a section heading; - cs.c: remove /** on non-kernel-doc comments & add function parameter info - ds.c: fix function parameter info Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Driver core: change add_uevent_var to use a structKay Sievers2007-10-121-7/+3
| | | | | | | | | | | | | | | | | | This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pcmcia: give socket time to power downDaniel Ritz2007-07-311-0/+3
| | | | | | | | | | | Give sockets up to 100ms of additional time to power down. otherwise we might generate false warnings with KERN_ERR priority (like in bug #8262). Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Cc: Nils Neumann <nils.neumann@rwth-aachen.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Freezer: make kernel threads nonfreezable by defaultRafael J. Wysocki2007-07-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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