summaryrefslogtreecommitdiffstats
path: root/drivers/usb/atm/usbatm.c (follow)
Commit message (Collapse)AuthorAgeFilesLines
* usb: atm: Use size_add() in call to struct_size()Gustavo A. R. Silva2023-10-021-1/+2
| | | | | | | | | | | | | If, for any reason, the open-coded arithmetic causes a wraparound, the protection that `struct_size()` adds against potential integer overflows is defeated. Fix this by hardening call to `struct_size()` with `size_add()`. Fixes: b626871a7cda ("usb: atm: Use struct_size() helper") Signed-off-by: "Gustavo A. R. Silva" <gustavoars@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/ZQSuboEIhvATAdxN@work Signed-off-by: Kees Cook <keescook@chromium.org>
* usb: move from strlcpy with unused retval to strscpyWolfram Sang2022-08-191-1/+1
| | | | | | | | | | | | | | Follow the advice of the below link and prefer 'strscpy' in this subsystem. Conversion is 1:1 because the return value is not used. Generated by a coccinelle script. Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/ Reviewed-by: Richard Leitner <richard.leitner@skidata.com> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20220818210116.7517-1-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: remove third argument of usb_maxpacket()Vincent Mailhol2022-04-231-1/+1
| | | | | | | | | | | | | | | | | | | | The third argument of usb_maxpacket(): in_out has been deprecated because it could be derived from the second argument (e.g. using usb_pipeout(pipe)). N.B. function usb_maxpacket() was made variadic to accommodate the transition from the old prototype with three arguments to the new one with only two arguments (so that no renaming is needed). The variadic argument is to be removed once all users of usb_maxpacket() get migrated. CC: Duncan Sands <duncan.sands@free.fr> CC: Alan Stern <stern@rowland.harvard.edu> CC: Olav Kongas <ok@artecdesign.ee> CC: Rui Miguel Silva <rui.silva@linaro.org> Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Link: https://lore.kernel.org/r/20220317035514.6378-7-mailhol.vincent@wanadoo.fr Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* exit: Rename complete_and_exit to kthread_complete_and_exitEric W. Biederman2021-12-131-1/+1
| | | | | | | | | | | | | | | | Update complete_and_exit to call kthread_exit instead of do_exit. Change the name to reflect this change in functionality. All of the users of complete_and_exit are causing the current kthread to exit so this change makes it clear what is happening. Move the implementation of kthread_complete_and_exit from kernel/exit.c to to kernel/kthread.c. As this function is kthread specific it makes most sense to live with the kthread functions. There are no functional change. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* usb: atm: Use struct_size() helperGustavo A. R. Silva2021-10-051-1/+3
| | | | | | | | | | | Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worse scenario, could lead to heap overflows. Link: https://github.com/KSPP/linux/issues/160 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20210928233935.GA299525@embeddedor Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers: usb: atm: use pr_err() and pr_warn() instead of raw printk()Enrico Weigelt, metux IT consult2020-12-091-1/+1
| | | | | | | | | | Since we have the nice helpers pr_err() and pr_warn(), use them instead of raw printk(). Acked-by: Duncan Sands <duncan.sands@free.fr> Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Link: https://lore.kernel.org/r/20201208093206.24780-3-info@metux.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: atm: Replace in_interrupt() usage in commentThomas Gleixner2020-10-281-1/+1
| | | | | | | | | | | | | | | | | in_interrupt() is a pretty vague context description as it means: hard interrupt, soft interrupt or bottom half disabled regions. Replace the vague comment with a proper reasoning why spin_lock_irqsave() needs to be used. Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Duncan Sands <duncan.sands@free.fr> Cc: linux-usb@vger.kernel.org Link: https://lore.kernel.org/r/20201019101110.944939915@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: atm: convert tasklets to use new tasklet_setup() APIAllen Pais2020-08-181-6/+8
| | | | | | | | | | | | In preparation for unconditionally passing the struct tasklet_struct pointer to all tasklet callbacks, switch to using the new tasklet_setup() and from_tasklet() to pass the tasklet pointer explicitly. Signed-off-by: Romain Perier <romain.perier@gmail.com> Signed-off-by: Allen Pais <allen.lkml@gmail.com> Link: https://lore.kernel.org/r/20200817090209.26351-2-allen.cryptic@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* treewide: Use sizeof_field() macroPankaj Bharadiya2019-12-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Replace all the occurrences of FIELD_SIZEOF() with sizeof_field() except at places where these are defined. Later patches will remove the unused definition of FIELD_SIZEOF(). This patch is generated using following script: EXCLUDE_FILES="include/linux/stddef.h|include/linux/kernel.h" git grep -l -e "\bFIELD_SIZEOF\b" | while read file; do if [[ "$file" =~ $EXCLUDE_FILES ]]; then continue fi sed -i -e 's/\bFIELD_SIZEOF\b/sizeof_field/g' $file; done Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com> Link: https://lore.kernel.org/r/20190924105839.110713-3-pankaj.laxminarayan.bharadiya@intel.com Co-developed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: David Miller <davem@davemloft.net> # for net
* usb: usbatm: Convert timers to use timer_setup()Kees Cook2017-11-221-5/+5
| | | | | | | | | | | | | | | In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Additionally corrects and on-stack timer usage. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Duncan Sands <duncan.sands@free.fr> Cc: "Gustavo A. R. Silva" <garsilva@embeddedor.com> Cc: accessrunner-general@lists.sourceforge.net Cc: linux-usb@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Allen Pais <allen.lkml@gmail.com>
* USB: atm: Remove redundant license textGreg Kroah-Hartman2017-11-041-15/+0
| | | | | | | | | | | | | | | | Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Duncan Sands <duncan.sands@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: add SPDX identifiers to all remaining files in drivers/usb/Greg Kroah-Hartman2017-11-041-0/+1
| | | | | | | | | | | | | | | | | | | | | It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: atm: make atmdev_ops constBhumika Goyal2017-08-101-1/+1
| | | | | | | | | Make these const as they are only passed to the function atm_dev_register and the corresponding argument is of type const. Done using Coccinelle. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: atm: remove unneeded MODULE_VERSION() usageGreg Kroah-Hartman2017-07-221-3/+1
| | | | | | | | | MODULE_VERSION is useless for in-kernel drivers, so just remove all usage of it in the USB ATM drivers. Along with this, some DRIVER_VERSION macros were removed as they are also pointless. Cc: Duncan Sands <duncan.sands@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar2017-03-021-1/+1
| | | | | | | | | | | | | | | | | | | | <linux/sched/signal.h> We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/signal.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds2016-12-241-1/+1
| | | | | | | | | | | | | This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* usb: atm: usbatm: don't print on ENOMEMWolfram Sang2016-08-301-6/+1
| | | | | | | All kmalloc-based functions print enough information on failures. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: atm: usbatm: don't print error when allocating urb failsWolfram Sang2016-08-151-1/+0
| | | | | | | kmalloc will print enough information in case of failure. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usbatm.c: move assignment out of if () blockGreg Kroah-Hartman2015-05-101-2/+4
| | | | | | | | | | | We should not be doing assignments within an if () block so fix up the code to not do this. change was created using Coccinelle. CC: Duncan Sands <duncan.sands@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Felipe Balbi <balbi@ti.com>
* Usb: atm: usbatm: fixed a pointer variable format issueSeth Archer Brown2013-12-091-4/+4
| | | | | | | | Fixed a pointer variable format issue. Signed-off-by: Seth Archer Brown <learc83@gmail.com> Acked-by: Duncan Sands <duncan.sands@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usbatm: remove CONFIG_USB_DEBUG dependancyGreg Kroah-Hartman2013-07-241-4/+3
| | | | | | | | | | | | | | Now that no USB atm driver is relying on the CONFIG_USB_DEBUG option (well, really the DEBUG option, thanks to some Makefile fun), remove it from the Makefile. Also remove two last vestiges of DEBUG in the usbatm.c driver, moving one to VERBOSE_DEBUG, which no one ever really cares about, and the other to use the dynamic debug subsystem. Cc: Duncan Sands <duncan.sands@free.fr> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usbatm: remove unneeded trace printk callsGreg Kroah-Hartman2013-07-241-34/+0
| | | | | | | | | We have an in-kernel trace subsystem, so use that instead of printk for trying to figure out what functions are being called. Cc: Duncan Sands <duncan.sands@free.fr> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usbatm: remove unused UDSL_ASSERT macroGreg Kroah-Hartman2013-07-241-8/+0
| | | | | | | | | If this code isn't triggering this assert by now, it never will, so just remove it, it's pointless. Cc: Duncan Sands <duncan.sands@free.fr> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers: avoid parsing names as kthread_run() format stringsKees Cook2013-07-041-2/+3
| | | | | | | | | | Calling kthread_run with a single name parameter causes it to be handled as a format string. Many callers are passing potentially dynamic string content, so use "%s" in those cases to avoid any potential accidents. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* usbatm: fix potential NULL pointer dereferenceWei Yongjun2013-04-191-3/+3
| | | | | | | | | The dereference to 'instance' in the debug code should be moved below the NULL test. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: atm: usbatm: fix up debug printing codeGreg Kroah-Hartman2012-09-131-18/+28
| | | | | | | | | If VERBOSE_DEBUG was enabled, lots of build errors happend (obviously no one uses this mode.) So fix that up, and get rid of the dbg() call, and use dev_dbg() like the rest of the driver does. Cc: Duncan Sands <duncan.sands@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usbatm.c: remove dbg() usageGreg Kroah-Hartman2012-05-021-21/+9
| | | | | | | | | dbg() was a very old USB-specific macro that should no longer be used. This patch removes it from being used in the driver and uses dev_dbg() instead. CC: Duncan Sands <duncan.sands@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/usb/atm: use printk_ratelimited() instead of printk_ratelimit()Manuel Zerpies2011-07-011-2/+2
| | | | | | | | Since printk_ratelimit() shouldn't be used anymore (see comment in include/linux/printk.h), replace it with printk_ratelimited() Signed-off-by: Manuel Zerpies <manuel.f.zerpies@ww.stud.uni-erlangen.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* atm: correct sysfs 'device' link creation and parent relationshipsDan Williams2010-12-111-12/+3
| | | | | | | | | | | The ATM subsystem was incorrectly creating the 'device' link for ATM nodes in sysfs. This led to incorrect device/parent relationships exposed by sysfs and udev. Instead of rolling the 'device' link by hand in the generic ATM code, pass each ATM driver's bus device down to the sysfs code and let sysfs do this stuff correctly. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* USB: speedtouch: fixed more brace and spacing coding style issuesNicolas Kaiser2010-08-101-8/+8
| | | | | | | | Fixed spacing coding style issues. Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* USB: speedtouch: fixed brace and spacing coding style issuesNicolas Kaiser2010-08-101-6/+3
| | | | | | | Fixed brace coding style issues. Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* USB: atm: Use FIELD_SIZEOF, trivial cleanup.Thiago Farina2010-03-021-1/+1
| | | | | | Signed-off-by: Thiago Farina <tfransosi@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* USB: cxacru: check device isn't being removed during sysfs callsSimon Arlott2010-03-021-0/+1
| | | | | | | | | | | | | | | | | It is possible for usb_get_intfdata() to return NULL if sysfs is accessed while the module is being unloaded or the device is being removed. Move the access code to an inline function in usbatm.h, and return -ENODEV if any of the pointers are NULL. It should not be possible for the instance data or atm device to be invalid until after unbind() completes and the sysfs attributes have been removed. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* net: convert more to %pMJohannes Berg2008-10-281-4/+1
| | | | | | | | | A number of places still use %02x:...:%02x because it's in debug statements or for no real reason. Make a few of them use %pM. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* USB: remove warn() macro from usb driversGreg Kroah-Hartman2008-10-171-5/+5
| | | | | | | | | USB should not be having it's own printk macros, so remove warn() and use the system-wide standard of dev_warn() wherever possible. In the few places that will not work out, use a basic printk(). Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* usbatm: Use skb_queue_walk_safe() instead of by-hand implementation.David S. Miller2008-09-231-3/+2
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* USB: usbatm: convert heavy init dances to kthread APIPavel Emelyanov2008-04-251-12/+15
| | | | | | | | | | | | | | | This is an attempt to kill two birds with one stone. First, we kill one more user of kernel_thread, which is scheduled for removal. Second - we kill one of the last users of kill_proc - the function which is also to be removed, because it uses a pid_t which is not safe now. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* USB: atm: usbatm: clean up urb->status usageGreg Kroah-Hartman2007-07-201-5/+6
| | | | | | | | This done in anticipation of removal of urb->status, which will make that patch easier to review and apply in the future. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* usbatm_heavy_init: don't use CLONE_SIGHANDOleg Nesterov2007-05-091-1/+1
| | | | | | | | | | | usbatm_do_heavy_init() calls allow_signal() which plays with parent process's ->sighand. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Duncan Sands <duncan.sands@free.fr> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* header cleaning: don't include smp_lock.h when not usedRandy Dunlap2007-05-081-1/+0
| | | | | | | | | | | | Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). 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>
* usbatm: Detect usb device shutdown and ignore failed urbsSimon Arlott2007-04-271-0/+3
| | | | | | | | | | | | | | | Detect usb device shutdown and ignore failed urbs. This happens when the driver is unloaded or the device is unplugged. I'm not sure what other urb statuses should be ignored, and the warning message doesn't need to be shown when the module is unloaded or the device is removed. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Cc: Duncan Sands <duncan.sands@math.u-psud.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* usbatm: create sysfs link "device" from atm class device to usb interfaceSimon Arlott2007-04-271-1/+13
| | | | | | | | | | | | | | | | | | | | | | There is currently no path from the ATM device in /sys to the USB device's interface that the driver is using; this patch creates a "device" symlink. It is then possible to get to the cxacru ADSL statistics (http://lkml.org/lkml/2007/2/23/328): /sys/class/atm/cxacru0/device $ ls *_rate *_margin *_attenuation downstream_attenuation downstream_snr_margin upstream_rate downstream_rate upstream_attenuation upstream_snr_margin If this link is not appropriate I'd have to create device files in /sys/class/atm/cxacru0 instead - which seems less appropriate since the ADSL statistics are for the USB device not ATM (which is running over the ADSL). [akpm@linux-foundation.org: cleanups] Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Cc: Duncan Sands <duncan.sands@math.u-psud.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [SK_BUFF]: Introduce skb_copy_to_linear_data{_offset}Arnaldo Carvalho de Melo2007-04-261-1/+3
| | | | | | | To clearly state the intent of copying to linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}Arnaldo Carvalho de Melo2007-04-261-1/+1
| | | | | | | To clearly state the intent of copying from linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* [SK_BUFF]: Convert skb->end to sk_buff_data_tArnaldo Carvalho de Melo2007-04-261-2/+2
| | | | | | | | Now to convert the last one, skb->data, that will allow many simplifications and removal of some of the offset helpers. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Convert skb->tail to sk_buff_data_tArnaldo Carvalho de Melo2007-04-261-5/+5
| | | | | | | | | | | | | | | So that it is also an offset from skb->head, reduces its size from 8 to 4 bytes on 64bit architectures, allowing us to combine the 4 bytes hole left by the layer headers conversion, reducing struct sk_buff size to 256 bytes, i.e. 4 64byte cachelines, and since the sk_buff slab cache is SLAB_HWCACHE_ALIGN... :-) Many calculations that previously required that skb->{transport,network, mac}_header be first converted to a pointer now can be done directly, being meaningful as offsets or pointers. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* USB: fix usbatm tiny raceAndrew Morton2006-10-171-1/+1
| | | | | | | | | | | | | | ia64: drivers/usb/atm/usbatm.c: In function `usbatm_do_heavy_init': drivers/usb/atm/usbatm.c:1004: warning: implicit declaration of function `get_current' drivers/usb/atm/usbatm.c:1004: error: invalid type argument of `->' Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* usbatm: fix tiny raceDuncan Sands2006-10-171-4/+1
| | | | | | | | | | If usbatm_do_heavy_init finishes before usbatm_heavy_init writes the pid, the disconnect method could shoot down the wrong process if the pid has been recycled. Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
* [PATCH] USBATM: remove pointless inlineDuncan Sands2006-06-221-1/+1
| | | | | | | Remove pointless inline. Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 02:37:02 +0100