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* sysfs: implement sysfs_dirent active reference and immediate disconnectTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sysfs: implement sysfs_dirent active reference and immediate disconnect Opening a sysfs node references its associated kobject, so userland can arbitrarily prolong lifetime of a kobject which complicates lifetime rules in drivers. This patch implements active reference and makes the association between kobject and sysfs immediately breakable. Now each sysfs_dirent has two reference counts - s_count and s_active. s_count is a regular reference count which guarantees that the containing sysfs_dirent is accessible. As long as s_count reference is held, all sysfs internal fields in sysfs_dirent are accessible including s_parent and s_name. The newly added s_active is active reference count. This is acquired by invoking sysfs_get_active() and it's the caller's responsibility to ensure sysfs_dirent itself is accessible (should be holding s_count one way or the other). Dereferencing sysfs_dirent to access objects out of sysfs proper requires active reference. This includes access to the associated kobjects, attributes and ops. The active references can be drained and denied by calling sysfs_deactivate(). All active sysfs_dirents must be deactivated after deletion but before the default reference is dropped. This enables immediate disconnect of sysfs nodes. Once a sysfs_dirent is deleted, it won't access any entity external to sysfs proper. Because attr/bin_attr ops access both the node itself and its parent for kobject, they need to hold active references to both. sysfs_get/put_active_two() helpers are provided to help grabbing both references. Parent's is acquired first and released last. Unlike other operations, mmapped area lingers on after mmap() is finished and the module implement implementing it and kobj need to stay referenced till all the mapped pages are gone. This is accomplished by holding one set of active references to the bin_attr and its parent if there have been any mmap during lifetime of an openfile. The references are dropped when the openfile is released. This change makes sysfs lifetime rules independent from both kobject's and module's. It not only fixes several race conditions caused by sysfs not holding onto the proper module when referencing kobject, but also helps fixing and simplifying lifetime management in driver model and drivers by taking sysfs out of the equation. Please read the following message for more info. http://article.gmane.org/gmane.linux.kernel/510293 Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: implement bin_bufferTejun Heo2007-07-11
| | | | | | | | | | Implement bin_buffer which contains a mutex and pointer to PAGE_SIZE buffer to properly synchronize accesses to per-openfile buffer and prepare for immediate-kobj-disconnect. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: reimplement symlink using sysfs_dirent treeTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | | | sysfs symlink is implemented by referencing dentry and kobject from sysfs_dirent - symlink entry references kobject, dentry is used to walk the tree. This complicates object lifetimes rules and is dangerous - for example, there is no way to tell to which module the target of a symlink belongs and referencing that kobject can make it linger after the module is gone. This patch reimplements symlink using only sysfs_dirent tree. sd for a symlink points and holds reference to the target sysfs_dirent and all walking is done using sysfs_dirent tree. Simpler and safer. Please read the following message for more info. http://article.gmane.org/gmane.linux.kernel/510293 Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: implement kobj_sysfs_assoc_lockTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | kobj->dentry can go away anytime unless the user controls when the associated sysfs node is deleted. This patch implements kobj_sysfs_assoc_lock which protects kobj->dentry. This will be used to maintain kobj based API when converting sysfs to use sysfs_dirent tree instead of dentry/kobject. Note that this lock belongs to kobject/driver-model not sysfs. Once sysfs is converted to not use kobject in its interface, this can be removed from sysfs. This is in preparation of object reference simplification. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: make sysfs_dirent->s_element a unionTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | | | Make sd->s_element a union of sysfs_elem_{dir|symlink|attr|bin_attr} and rename it to s_elem. This is to achieve... * some level of type checking : changing symlink to point to sysfs_dirent instead of kobject is much safer and less painful now. * easier / standardized dereferencing * allow sysfs_elem_* to contain more than one entry Where possible, pointer is obtained by directly deferencing from sd instead of going through other entities. This reduces dependencies to dentry, inode and kobject. to_attr() and to_bin_attr() are unused now and removed. This is in preparation of object reference simplification. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: add sysfs_dirent->s_nameTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | Add s_name to sysfs_dirent. This is to further reduce dependency to the associated dentry. Name is copied for directories and symlinks but not for attributes. Where possible, name dereferences are converted to use sd->s_name. sysfs_symlink->link_name and sysfs_get_name() are unused now and removed. This change allows symlink to be implemented using sysfs_dirent tree proper, which is the last remaining dentry-dependent sysfs walk. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: add sysfs_dirent->s_parentTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | | | Add sysfs_dirent->s_parent. With this patch, each sd points to and holds a reference to its parent. This allows walking sysfs tree without referencing sd->s_dentry which can go away anytime if the user doesn't control when it's deleted. sd->s_parent is initialized and parent is referenced in sysfs_attach_dirent(). Reference to parent is released when the sd is released, so as long as reference to a sd is held, s_parent can be followed. dentry walk in sysfs_readdir() is convereted to s_parent walk. This will be used to reimplement symlink such that it uses only sysfs_dirent tree. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: consolidate sysfs_dirent creation functionsTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | | | Currently there are four functions to create sysfs_dirent - __sysfs_new_dirent(), sysfs_new_dirent(), __sysfs_make_dirent() and sysfs_make_dirent(). Other than sysfs_make_dirent(), no function has two users if calls to implement other functions are excluded. This patch consolidates sysfs_dirent creation functions into the following two. * sysfs_new_dirent() : allocate and initialize * sysfs_attach_dirent() : attach to sysfs_dirent hierarchy and/or associate with dentry This simplifies interface and gives callers more flexibility. This is in preparation of object reference simplification. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: flatten and fix sysfs_rename_dir() error handlingTejun Heo2007-07-11
| | | | | | | | | | | | | | | | Error handling in sysfs_rename_dir() was broken. * When lookup_one_len() fails, 0 is returned. * If parent inode check fails, returns with inode mutex and rename rwsem held. This patch fixes the above bugs and flattens error handling such that it's more readable and easier to modify. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: flatten cleanup paths in sysfs_add_link() and create_dir()Tejun Heo2007-07-11
| | | | | | | | | | Flatten cleanup paths in sysfs_add_link() and create_dir() to improve readability and ease further changes to these functions. This is in preparation of object reference simplification. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: fix error handling in binattr write()Tejun Heo2007-07-11
| | | | | | | | | | | | | Error handling in fs/sysfs/bin.c:write() was wrong because size_t count is used to receive return value from flush_write() which is negative on failure. This patch updates write() such that int variable is used instead. read() is updated the same way for consistency. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: make sysfs_put() ignore NULL sdTejun Heo2007-07-11
| | | | | | | | Make sysfs_put() ignore NULL sd instead of oopsing. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: allocate inode number using idaTejun Heo2007-07-11
| | | | | | | | | | sysfs used simple incrementing allocator which is not guaranteed to be unique. This patch makes sysfs use ida to give each sd a unique and packed inode number. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: move release_sysfs_dirent() to dir.cTejun Heo2007-07-11
| | | | | | | | | | There is no reason this function should be inlined and soon to follow sysfs object reference simplification will make it heavier. Move it to dir.c. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* ida: implement idr based id allocatorTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | Implement idr based id allocator. ida is used the same way idr is used but lacks id -> ptr translation and thus consumes much less memory. struct ida_bitmap is attached as leaf nodes to idr tree which is managed by the idr code. Each ida_bitmap is 128bytes long and contains slightly less than a thousand slots. ida is more aggressive with releasing extra resources acquired using ida_pre_get(). After every successful id allocation, ida frees one reserved idr_layer if possible. Reserved ida_bitmap is not freed automatically but only one ida_bitmap is reserved and it's almost always used right away. Under most circumstances, ida won't hold on to memory for too long which isn't actively used. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* idr: separate out idr_mark_full()Tejun Heo2007-07-11
| | | | | | | | | | | | | | | | | Separate out idr_mark_full() from sub_alloc() and make marking the allocated slot full the responsibility of idr_get_new_above_int(). Allocation part of idr_get_new_above_int() is renamed to idr_get_empty_slot(). New idr_get_new_above_int() allocates a slot using the function, install the user pointer and marks it full using idr_mark_full(). This change doesn't introduce any behavior change. This will be used by ida. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* idr: fix obscure bug in allocation pathTejun Heo2007-07-11
| | | | | | | | | | | | | | | | | | | | In sub_alloc(), when bitmap search fails, it goes up one level to continue search. This is done by updating the id cursor and searching the upper level again. If the cursor was at the end of the upper level, we need to go further than that. This wasn't implemented and when that happens the part of the cursor which indexes into the upper level wraps and sub_alloc() ends up searching the wrong bitmap. It allocates id which doesn't match the actual slot. This patch fixes this by restarting from the top if the search needs to go higher than one level. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: coding style cleanupCornelia Huck2007-07-11
| | | | | | | | | | | | | | | | This converts code of the form if ((error = some_func())) goto fixup; to error = some_func(); if (error) goto fixup; Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PM: do not use saved_state from struct dev_pm_info on ARMRafael J. Wysocki2007-07-11
| | | | | | | | | | | | | | | The saved_state member of 'struct dev_pm_info' that's going to be removed is used in arch/arm/common/locomo.c, arch/arm/common/sa1111.c and arch/arm/mach-sa1100/neponset.c. Change the code in there to use local variables for saving the state of devices during suspend. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Greg KH <greg@kroah.com> Cc: David Brownell <david-b@pacbell.net> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PM: Do not check parent state in suspend and resume core codeRafael J. Wysocki2007-07-11
| | | | | | | | | | | | | | | | The checks if the device's parent is in the right state done in drivers/base/power/suspend.c and drivers/base/power/resume.c serve no particular purpose, since if the parent is in a wrong power state, the device's suspend or resume callbacks are supposed to return an error anyway. Moreover, they are also useless from the sanity checking point of view, because they rely on the code being checked to set dev->parent->power.power_state.event appropriately, which need not happen if that code is buggy. For these reasons they can be removed. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PM: Remove power_state.event checks from suspend core codeRafael J. Wysocki2007-07-11
| | | | | | | | | | | | | | | The suspend routines should be called for every device during a system sleep transition, regardless of the device's state, so that drivers can regard these method calls as notifications that the system is about to go to sleep, rather than as directives to put their devices into the 'off' state. This is documented in Documentation/power/devices.txt and is already done in the core resume code, so it seems reasonable to make the core suspend code behave accordingly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PM: Remove prev_state from struct dev_pm_infoRafael J. Wysocki2007-07-11
| | | | | | | | | | | | | | The prev_state member of struct dev_pm_info (defined in include/linux/pm.h) is only used during a resume to check if the device's state before the suspend was 'off', in which case the device is not resumed. However, in such cases the decision whether or not to resume the device should be made on the driver level and the resume callbacks from the device's bus and class should be executed anyway (the may be needed for some things other than just powering on the device). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: fix devres_release_all() return valueAdrian Bunk2007-07-11
| | | | | | | | | | | | | | Every file should include the headers containing the prototypes for it's global functions. Since the GNU C compiler is now able to detect that the function prototype of devres_release_all() in the header and the actual function disagree regarding the return value, this patch also fixes this bug. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: fix kernel doc of device_release_driverStefan Richter2007-07-11
| | | | | | Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: properly get driver in device_release_driverStefan Richter2007-07-11
| | | | | | Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: include linux/mutex.h from attribute_container.cMichael S. Tsirkin2007-07-11
| | | | | | | | | | attribute_container.c uses DEFINE_MUTEX, so while linux/mutex.h seems to be pulled in indirectly by one of the headers it includes, the right thing is to include linux/mutex.h directly. Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
* PM: Simplify suspend_deviceRafael J. Wysocki2007-07-11
| | | | | | | | | | Reduce code duplication in drivers/base/suspend.c by introducing a separate function for printing diagnostic messages. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PM: Remove saved_state from struct dev_pm_infoRafael J. Wysocki2007-07-11
| | | | | | | | | The saved_state member of struct dev_pm_info, defined in include/linux/pm.h, is not used anywhere, so it can be removed. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PM: Remove pm_parent from struct dev_pm_infoRafael J. Wysocki2007-07-11
| | | | | | | | | | | | | The pm_parent member of struct dev_pm_info (defined in include/linux/pm.h) is only used to check if the device's parent is in the right state while the device is being suspended or resumed. However, this can be done just as well with the help of the parent pointer in struct device, so pm_parent can be removed along with some code that handles it. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Power Management: use mutexes instead of semaphoresMatthias Kaehlcke2007-07-11
| | | | | | | | | | The Power Management code uses semaphores as mutexes. Use the mutex API instead of the (binary) semaphores. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysdev: use mutex instead of semaphoreMatthias Kaehlcke2007-07-11
| | | | | | | | | | The sysdev code use a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: add missing kset ueventKay Sievers2007-07-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We get uevents for a bus/class going away, but not one registering. Add the missing uevent in kset_register(), which will send an event for a new bus/class. Suppress all unwanted uevents for bus subdirectories like /bus/*/devices/, /bus/*/drivers/. Now we get for module usbcore: add /module/usbcore (module) add /bus/usb (bus) add /class/usb_host (class) add /bus/usb/drivers/hub (drivers) add /bus/usb/drivers/usb (drivers) remove /bus/usb/drivers/usb (drivers) remove /bus/usb/drivers/hub (drivers) remove /class/usb_host (class) remove /bus/usb (bus) remove /module/usbcore (module) instead of: add /module/usbcore (module) add /bus/usb/drivers/hub (drivers) add /bus/usb/drivers/usb (drivers) remove /bus/usb/drivers/usb (drivers) remove /bus/usb/drivers/hub (drivers) remove /class/usb_host (class) remove /bus/usb/drivers (bus) remove /bus/usb/devices (bus) remove /bus/usb (bus) remove /module/usbcore (module) Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* DMI-based module autoloadingLennart Poettering2007-07-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch below adds DMI/SMBIOS based module autoloading to the Linux kernel. The idea is to load laptop drivers automatically (and other drivers which cannot be autoloaded otherwise), based on the DMI system identification information of the BIOS. Right now most distros manually try to load all available laptop drivers on bootup in the hope that at least one of them loads successfully. This patch does away with all that, and uses udev to automatically load matching drivers on the right machines. Basically the patch just exports the DMI information that has been parsed by the kernel anyway to userspace via a sysfs device /sys/class/dmi/id and makes sure that proper modalias attributes are available. Besides adding the "modalias" attribute it also adds attributes for a few other DMI fields which might be useful for writing udev rules. This patch is not an attempt to export the entire DMI/SMBIOS data to userspace. We already have "dmidecode" which parses the complete DMI info from userspace. The purpose of this patch is machine model identification and good udev integration. To take advantage of DMI based module autoloading, a driver should export one or more MODULE_ALIAS fields similar to these: MODULE_ALIAS("dmi:*:svnMICRO-STARINT'LCO.,LTD:pnMS-1013:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*"); MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1058:pvr0581:rvnMSI:rnMS-1058:*:ct10:*"); MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1412:*:rvnMSI:rnMS-1412:*:cvnMICRO-STARINT'LCO.,LTD:ct10:*"); MODULE_ALIAS("dmi:*:svnNOTEBOOK:pnSAM2000:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*"); These lines are specific to my msi-laptop.c driver. They are basically just a concatenation of a few carefully selected DMI fields with all potentially bad characters stripped. Besides laptop drivers, modules like "hdaps", the i2c modules and the hwmon modules are good candidates for "dmi:" MODULE_ALIAS lines. Besides merely exporting the DMI data via sysfs the patch adds support for a few more DMI fields. Especially the CHASSIS fields are very useful to identify different laptop modules. The patch also adds working MODULE_ALIAS lines to my msi-laptop.c driver. I'd like to thank Kay Sievers for helping me to clean up this patch for posting it on lkml. Patch is against Linus' current GIT HEAD. Should probably apply to older kernels as well without modification. Signed-off-by: Lennart Poettering <mzxreary@0pointer.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* debugfs: add rename for debugfs filesJan Kara2007-07-11
| | | | | | | | Implement debugfs_rename() to allow renaming files/directories in debugfs. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Rules on how to use sysfs in userspace programsKay Sievers2007-07-11
| | | | | | | Here's a document to help clear things up. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* lots-of-architectures: enable arbitary speed tty supportAlan Cox2007-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the termios2 structure ready for enabling on most platforms. One or two like Sparc are plain weird so have been left alone. Most can use the same structure as ktermios for termios2 (ie the newer ioctl uses the structure matching the current kernel structure) Signed-off-by: Alan Cox <alan@redhat.com> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Ian Molton <spyro@f2s.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Make common helpers for seq_files that work with list_headsPavel Emelianov2007-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many places in kernel use seq_file API to iterate over a regular list_head. The code for such iteration is identical in all the places, so it's worth introducing a common helpers. This makes code about 300 lines smaller: The first version of this patch made the helper functions static inline in the seq_file.h header. This patch moves them to the fs/seq_file.c as Andrew proposed. The vmlinux .text section sizes are as follows: 2.6.22-rc1-mm1: 0x001794d5 with the previous version: 0x00179505 with this patch: 0x00179135 The config file used was make allnoconfig with the "y" inclusion of all the possible options to make the files modified by the patch compile plus drivers I have on the test node. This patch: Many places in kernel use seq_file API to iterate over a regular list_head. The code for such iteration is identical in all the places, so it's worth introducing a common helpers. Signed-off-by: Pavel Emelianov <xemul@openvz.org> 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>
* sx: switch subven and subid valuesJiri Slaby2007-07-10
| | | | | | | | | | sx.c is failing to locate Graham's card. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Graham Murray <gmurray@webwayone.co.uk> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add LZO1X algorithm to the kernelRichard Purdie2007-07-10
| | | | | | | | | | | | | | | | | | | This is a hybrid version of the patch to add the LZO1X compression algorithm to the kernel. Nitin and myself have merged the best parts of the various patches to form this version which we're both happy with (and are jointly signing off). The performance of this version is equivalent to the original minilzo code it was based on. Bytecode comparisons have also been made on ARM, i386 and x86_64 with favourable results. There are several users of LZO lined up including jffs2, crypto and reiser4 since its much faster than zlib. Signed-off-by: Nitin Gupta <nitingupta910@gmail.com> Signed-off-by: Richard Purdie <rpurdie@openedhand.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2007-07-10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: mmc: at91_mci: fix hanging and rework to match flowcharts mmc: at91_mci typo sdhci: Fix "Unexpected interrupt" handling mmc: fix silly copy-and-paste error mmc: move layer init and workqueue to core file mmc: refactor host class handling mmc: refactor bus operations sdhci: add ene controller id mmc: bounce requests for simple hosts
| * mmc: at91_mci: fix hanging and rework to match flowchartsNicolas Ferre2007-07-09
| | | | | | | | | | | | | | | | | | | | | | | | Fixes hanging using multi block operations (seen during CMD25). Follows closely the datasheet flowcharts. This piece of code handles better big file writing. I had to take care of the notbusy signal during write (at91_mci_handle_cmdrdy function) and to rearrange the AT91_MCI_ENDRX and AT91_MCI_RXBUFF flag usage. Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * mmc: at91_mci typoNicolas Ferre2007-07-09
| | | | | | | | | | | | | | | | Typo fix in at91_mci driver : standardized the typo (at91_mci everywhere) Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * sdhci: Fix "Unexpected interrupt" handlingRolf Eike Beer2007-07-09
| | | | | | | | | | | | | | | | | | Whenever a power interrupt is signaled it is also reported as an unexpected one. All other unexpected interrupts get lost. Cause is a not inversed bitmask to remove power interrupts from the status. Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * mmc: fix silly copy-and-paste errorPierre Ossman2007-07-09
| | | | | | | | Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * mmc: move layer init and workqueue to core filePierre Ossman2007-07-09
| | | | | | | | Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * mmc: refactor host class handlingPierre Ossman2007-07-09
| | | | | | | | | | | | Move basic host class device handling to its own file for clarity. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * mmc: refactor bus operationsPierre Ossman2007-07-09
| | | | | | | | | | | | | | | | Move bus operations to its own file for the sake of clarity. Also delegate sysfs attributes to bus handlers in preparation for other more exotic types. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * sdhci: add ene controller idMilko Krachounov2007-07-09
| | | | | | | | | | | | | | | | | | ENE has a very weird design where an SDHCI device (0805) is presented on the PCI bus, but that device is non-functional, and the real device is hidden as a more generic device. Signed-off-by: Milko Krachounov <milko@3mhz.net> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * mmc: bounce requests for simple hostsPierre Ossman2007-07-09
| | | | | | | | | | | | | | | | Some hosts cannot do scatter/gather in hardware. Since not doing sg is such a big performance hit, we (optionally) bounce the requests to a simple linear buffer that we hand over to the driver. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
* | Merge branch 'upstream-linus' of ↵Linus Torvalds2007-07-10
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (40 commits) bonding/bond_main.c: make 2 functions static ps3: gigabit ethernet driver for PS3, take3 [netdrvr] Fix dependencies for ax88796 ne2k clone driver eHEA: Capability flag for DLPAR support Remove sk98lin ethernet driver. sunhme.c:quattro_pci_find() must be __devinit bonding / ipv6: no addrconf for slaves separately from master atl1: remove write-only var in tx handler macmace: use "unsigned long flags;" Cleanup usbnet_probe() return value handling netxen: deinline and sparse fix eeprom_93cx6: shorten pulse timing to match spec (bis) phylib: Add Marvell 88E1112 phy id phylib: cleanup marvell.c a bit AX88796 network driver IOC3: Switch to pci refcounting safe APIs e100: Fix Tyan motherboard e100 not receiving IPMI commands QE Ethernet driver writes to wrong register to mask interrupts rrunner.c:rr_init() must be __devinit tokenring/3c359.c:xl_init() must be __devinit ...
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