summaryrefslogtreecommitdiff
path: root/drivers/edac/edac_pci_sysfs.c
AgeCommit message (Collapse)Author
2015-12-11EDAC: Remove edac_get_sysfs_subsys() error handlingBorislav Petkov
It cannot fail now. We either load EDAC core after having successfully initialized edac_subsys or we don't. Signed-off-by: Borislav Petkov <bp@suse.de>
2015-12-11EDAC: Rip out the edac_subsys reference countingBorislav Petkov
This was really dumb - reference counting for the main EDAC sysfs object. While we could've simply registered it as the first thing in the module init path and then hand it around to what needs it. Do that and rip out all the code around it, thus simplifying the whole handling significantly. Move the edac_subsys node back to edac_module.c. Signed-off-by: Borislav Petkov <bp@suse.de>
2014-11-11EDAC, pci_sysfs: remove unneccessary ifdef around entire fileAndreas Ruprecht
The file edac_pci_sysfs.c is dependent on CONFIG_PCI. This is already modelled in the Makefile, but edac_pci_sysfs.o is still contained in the list of files compiled even without CONFIG_PCI. This change removes edac_pci_sysfs.o from the list of built objects when not having CONFIG_PCI enabled and removes the then-unnecessary ifdef from the source file. Signed-off-by: Andreas Ruprecht <rupran@einserver.de> Link: http://lkml.kernel.org/r/1407697803-3837-1-git-send-email-rupran@einserver.de Signed-off-by: Borislav Petkov <bp@suse.de>
2013-02-20Merge tag 'v3.8-rc7' into nextMauro Carvalho Chehab
Linux 3.8-rc7 * tag 'v3.8-rc7': (12052 commits) Linux 3.8-rc7 net: sctp: sctp_endpoint_free: zero out secret key data net: sctp: sctp_setsockopt_auth_key: use kzfree instead of kfree atm/iphase: rename fregt_t -> ffreg_t ARM: 7641/1: memory: fix broken mmap by ensuring TASK_UNMAPPED_BASE is aligned ARM: DMA mapping: fix bad atomic test ARM: realview: ensure that we have sufficient IRQs available ARM: GIC: fix GIC cpumask initialization net: usb: fix regression from FLAG_NOARP code l2tp: dont play with skb->truesize net: sctp: sctp_auth_key_put: use kzfree instead of kfree netback: correct netbk_tx_err to handle wrap around. xen/netback: free already allocated memory on failure in xen_netbk_get_requests xen/netback: don't leak pages on failure in xen_netbk_tx_check_gop. xen/netback: shutdown the ring if it contains garbage. drm/ttm: fix fence locking in ttm_buffer_object_transfer, 2nd try virtio_console: Don't access uninitialized data. net: qmi_wwan: add more Huawei devices, including E320 net: cdc_ncm: add another Huawei vendor specific device ipv6/ip6_gre: fix error case handling in ip6gre_tunnel_xmit() ...
2013-01-30EDAC: Test correct variable in ->store functionDan Carpenter
We're testing for ->show but calling ->store(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: Borislav Petkov <bp@suse.de>
2012-12-21i7core_edac: fix kernel crash on unloading i7core_edac.Lans Zhang
It is easy to trigger this crash on 3.7.0: root@intel_westmere_ep-3:~# modprobe -r i7core_edac EDAC PCI: Removed device 0 for i7core_edac EDAC PCI controller: DEV 0000:fe:03.0 EDAC MC: Removed device 1 for i7core_edac.c i7 core #1: DEV 0000:fe:03.0 EDAC PCI: Removed device 1 for i7core_edac EDAC PCI controller: DEV 0000:ff:03.0 EDAC MC: Removed device 0 for i7core_edac.c i7 core #0: DEV 0000:ff:03.0 BUG: unable to handle kernel NULL pointer dereference at 0000000000000110 IP: [<ffffffff82069ee9>] __blocking_notifier_call_chain+0x29/0x80 PGD 1eaae7067 PUD 1e96e4067 PMD 0 Oops: 0000 [#1] PREEMPT SMP Modules linked in: minix acpi_cpufreq freq_table mperf ioatdma processor edac_core(-) iTCO_wdt coretemp evdev hwmon lpc_ich dca mfd_core crc32c_intel ioapic [last unloaded: i7core_edac] CPU 3 Pid: 1268, comm: modprobe Not tainted 3.7.0-WR5.0.1.0_standard+ #30 Intel Corporation S5520HC/S5520HC RIP: 0010:[<ffffffff82069ee9>] [<ffffffff82069ee9>] __blocking_notifier_call_chain+0x29/0x80 RSP: 0018:ffff8801eb12de28 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000000000f0 RCX: 00000000ffffffff RDX: ffff88012b452800 RSI: 0000000000000002 RDI: 00000000000000f0 RBP: ffff8801eb12de68 R08: 0000000000000000 R09: ffffea0004ad1118 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801eb12dee8 R14: ffff88012b452800 R15: 000000000060e518 FS: 00007f9ea95a9700(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000110 CR3: 00000001262f1000 CR4: 00000000000007e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process modprobe (pid: 1268, threadinfo ffff8801eb12c000, task ffff8801e8421690) Stack: ffff88012c802a00 ffff88012b445ec0 ffff88012c802300 ffff88012b452800 0000000000000000 ffff8801eb12dee8 000000000060e080 000000000060e518 ffff8801eb12de78 ffffffff82069f56 ffff8801eb12dea8 ffffffff824ead7c Call Trace: [<ffffffff82069f56>] blocking_notifier_call_chain+0x16/0x20 [<ffffffff824ead7c>] device_del+0x3c/0x1d0 [<ffffffffa00095a8>] edac_mc_sysfs_exit+0x1c/0x2f [edac_core] [<ffffffffa000961c>] edac_exit+0x4f/0x56 [edac_core] [<ffffffff820a3d2a>] sys_delete_module+0x17a/0x240 [<ffffffff8212da7c>] ? vm_munmap+0x5c/0x80 [<ffffffff82877682>] system_call_fastpath+0x16/0x1b Code: 90 90 55 48 89 e5 48 83 ec 40 48 89 5d d8 4c 89 65 e0 4c 89 6d e8 4c 89 75 f0 4c 89 7d f8 66 66 66 66 90 31 c0 49 89 d6 48 89 fb <48> 8b 57 20 49 89 f5 41 89 cf 4c 8d 67 20 48 85 d2 74 2c 4c 89 RIP [<ffffffff82069ee9>] __blocking_notifier_call_chain+0x29/0x80 RSP <ffff8801eb12de28> CR2: 0000000000000110 ---[ end trace b69acf12ccad1c0d ]--- Usually, edac_subsys is grabbed one time by pci at initialization. But edac_subsys may be released several times if multiple pci MCs exist. The fix just makes the operations balanced. Signed-off-by: Lans Zhang <jia.zhang@windriver.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-12-04EDAC, pci_sysfs: Use for_each_pci_dev to simplify the codeWei Yongjun
Use for_each_pci_dev to simplify the code. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> [Boris: cleanup comments and drop loop brackets] Signed-off-by: Borislav Petkov <bp@alien8.de>
2012-06-11edac: Convert debugfX to edac_dbg(X,Joe Perches
Use a more common debugging style. Remove __FILE__ uses, add missing newlines, coalesce formats and align arguments. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Don't add __func__ or __FILE__ for debugf[0-9] msgsMauro Carvalho Chehab
The debug macro already adds that. Most of the work here was made by this small script: $f .=$_ while (<>); $f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*": /\1"/g; $f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*/\1/g; $f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*"MC: /\1"/g; $f =~ s/(debugf[0-9]\s*\(\")\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+)__func__\s*\,\s*/\1\2/g; $f =~ s/(debugf[0-9]\s*\(\")\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+),\s*__func__\s*\)/\1\2)/g; $f =~ s/(debugf[0-9]\s*\(\"MC\:\s*)\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+)__func__\s*\,\s*/\1\2/g; $f =~ s/(debugf[0-9]\s*\(\"MC\:\s*)\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+),\s*__func__\s*\)/\1\2)/g; $f =~ s/\"MC\: \\n\"/"MC:\\n"/g; print $f; After running the script, manual cleanups were done to fix it the remaining places. While here, removed the __LINE__ on most places, as it doesn't actually give useful info on most places. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-14edac: convert sysdev_class to a regular subsystemKay Sievers
After all sysdev classes are ported to regular driver core entities, the sysdev implementation will be entirely removed from the kernel. Cc: Doug Thompson <dougthompson@xmission.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi> Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2010-10-21EDAC: Export edac sysfs class to users.Borislav Petkov
Move toplevel sysfs class to the stub and make it available to non-modularized code too. Add proper refcounting of its users and move the registration functionality into the reference counting routines. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-07Driver core: Constify struct sysfs_ops in struct kobj_typeEmese Revfy
Constify struct sysfs_ops. This is part of the ops structure constification effort started by Arjan van de Ven et al. Benefits of this constification: * prevents modification of data that is shared (referenced) by many other structure instances at runtime * detects/prevents accidental (but not intentional) modification attempts on archs that enforce read-only kernel data at runtime * potentially better optimized code as the compiler can assume that the const data cannot be changed * the compiler/linker move const data into .rodata and therefore exclude them from false sharing Signed-off-by: Emese Revfy <re.emese@gmail.com> Acked-by: David Teigland <teigland@redhat.com> Acked-by: Matt Domsch <Matt_Domsch@dell.com> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Acked-by: Hans J. Koch <hjk@linutronix.de> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Jens Axboe <jens.axboe@oracle.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-24edac, pci: remove pesky debug printkBorislav Petkov
Do not spam the logs needlessly with the sole info that edac_pci_dev_parity_clear is being called. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-01-06edac: struct device: replace bus_id with dev_name(), dev_set_name()Kay Sievers
This patch is part of a larger patch series which will remove the "char bus_id[20]" name string from struct device. The device name is managed in the kobject anyway, and without any size limitation, and just needlessly copied into "struct device". [akpm@linux-foundation.org: coding-style fixes] Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25edac: core fix to use dynamic kobjectArthur Jones
Static kobjects are not supported in linux kernel. Convert the edac_pci_top_main_kobj from static to dynamic. This avoids the double free of the edac_pci_top_main_kobj.name that we see on module reload of the e752x edac driver (and probably others as well). In addition Greg KH <greg@kroah.com> has pointed out that this code may be cleaned up significantly. I will look at that as a follow-on patch, for now, I just want the minimum fix to get this double-free oops bug squashed... Many thanks to Greg KH for his patience in showing me what the Documentation/kobject.txt already said (oops)... Signed-off-by: Arthur Jones <ajones@riverbed.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29edac: remove unneeded functions and add static accessorAdrian Bunk
Collection of patches, merged into one, from Adrian that do the following: 1) This patch makes the following needlessly global functions static: - edac_pci_get_log_pe() - edac_pci_get_log_npe() - edac_pci_get_panic_on_pe() - edac_pci_unregister_sysfs_instance_kobj() - edac_pci_main_kobj_setup() 2) Remove unneeded function edac_device_find() 3) Added #if 0 around function edac_pci_find() 4) make the needlessly global edac_pci_generic_check() static 5) Removed function edac_check_mc_devices() Doug Thompson modified Adrian's patches, to bettern represent the direction of EDAC, and make them one patch. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07drivers/edac: pci: broken parity regressionBryan Boatright
Using the EDAC code in kernel.org kernel version 2.6.23.8 I am seeing the following problem: In the kernel there is a pci device attribute located in sysfs that is checked by the EDAC PCI scanning code. If that attribute is set, PCI parity/error scannining is skipped for that device. The attribute is: broken_parity_status as is located in /sys/devices/pci<XXX>/0000:XX:YY.Z directorys for PCI devices. I don't think this check was actually implemented. I have a misbehaved card that reports a parity error every 1000 ms: Nov 25 07:28:43 beta kernel: EDAC PCI: Master Data Parity Error on 0000:05:01.0 Nov 25 07:28:44 beta kernel: EDAC PCI: Master Data Parity Error on 0000:05:01.0 Nov 25 07:28:45 beta kernel: EDAC PCI: Master Data Parity Error on 0000:05:01.0 Setting that card's broken_parity_status bit did not mask the error: echo "1" > /sys/bus/pci/devices/0000:05:01.0/broken_parity_status I looked through the EDAC code and did not readily see any reference to broken_parity_status at all (which makes sense based on the behavior I am seeing). I applied the following patch as a proof-of-concept and now EDAC's PCI parity error reporting behaves as documented: bryan Good regression find, bryan. It used to work. sigh. I added more logic to your patch, for more coverage of the error. Doug T Signed-off-by: Bryan Boatright <b1@omega71.com> Signed-off-by: Doug Thompson <dougthompson@xmisson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-24Kobject: convert drivers/* from kobject_unregister() to kobject_put()Greg Kroah-Hartman
There is no need for kobject_unregister() anymore, thanks to Kay's kobject cleanup changes, so replace all instances of it with kobject_put(). Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24Kobject: change drivers/edac to use kobject_init_and_addGreg Kroah-Hartman
Stop using kobject_register, as this way we can control the sending of the uevent properly, after everything is properly initialized. Acked-by: Doug Thompson <dougthompson@xmission.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-26drivers/edac: fix edac_pci sysfsDoug Thompson
This patch fixes sysfs exit code for the EDAC PCI device in a similiar manner and the previous fixes for EDAC_MC and EDAC_DEVICE. It removes the old (and incorrect) completion model and uses reference counts on per instance kobjects and on the edac core module. This pattern was applied to the edac_mc and edac_device code, but the EDAC PCI code was missed. In addition, this fixes a system hang after a low level driver was unloaded. (A cleanup function was called twice, which really screwed things up) Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: remove null from staticsDouglas Thompson
Patches to conform to coding style, namely static don't need to be initialized to NULL nor '0', as that is the default Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: cleanup spaces-gotos after Lindent messupDouglas Thompson
This patch fixes some remnant spaces inserted by the use of Lindent. Seems Lindent adds some spaces when it shoulded. These have been fixed. In addition, goto targets have issues, these have been fixed in this patch. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: core Lindent cleanupDouglas Thompson
Run the EDAC CORE files through Lindent for cleanup Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: mod PCI poll namesDave Jiang
Fixup poll values for MC and PCI. Also make mc function names unique to mc. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmissin.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: updated PCI monitoringDave Jiang
Moving PCI to a per-instance device model This should include the correct sysfs setup as well. Please review. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: mod use edac_core.hDouglas Thompson
In the refactoring of edac_mc.c into several subsystem files, the header file edac_mc.h became meaningless. A new header file edac_core.h was created. All the files that previously included "edac_mc.h" are changed to include "edac_core.h". Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: split out functions to unique filesDouglas Thompson
This is a large patch to refactor the original EDAC module in the kernel and to break it up into better file granularity, such that each source file contains a given subsystem of the EDAC CORE. Originally, the EDAC 'core' was contained in one source file: edac_mc.c with it corresponding edac_mc.h file. Now, there are the following files: edac_module.c The main module init/exit function and other overhead edac_mc.c Code handling the edac_mc class of object edac_mc_sysfs.c Code handling for sysfs presentation edac_pci_sysfs.c Code handling for PCI sysfs presentation edac_core.h CORE .h include file for 'edac_mc' and 'edac_device' drivers edac_module.h Internal CORE .h include file This forms a foundation upon which a later patch can create the 'edac_device' class of object code in a new file 'edac_device.c'. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>