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* consolidate the reassignments of ->f_op in ->open() instancesAl Viro2013-10-241-14/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* drivers: avoid format string in dev_set_nameKees Cook2013-07-031-1/+1
| | | | | | | | | | | Calling dev_set_name with a single paramter 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, including wrappers like device_create*() and bdi_register(). 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>
* ALSA: add/change some comments describing function return valuesYacine Belkadi2013-03-121-7/+15
| | | | | | | | | | | | | | | | | | | script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* sound: remove reference to feature-removal-schedule.txtTao Ma2012-12-171-2/+1
| | | | | | | | | | In commit 9c0ece069b32 ("Get rid of Documentation/feature-removal.txt"), Linus removed feature-removal-schedule.txt from Documentation, but there is still some reference to this file. So remove them. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sound: allow the unit search until 256 in sound_core.cTakashi Iwai2012-05-081-1/+1
| | | | | | | The upper limit of the available minors isn't necessarily 128 + unit, but it's rather up to 256. Fixing this allows more than 8 devices. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* switch device_get_devnode() and ->devnode() to umode_t *Al Viro2012-01-031-1/+1
| | | | | | | both callers of device_get_devnode() are only interested in lower 16bits and nobody tries to return anything wider than 16bit anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* sound: Use sound_register_*() for additional OSS minor devicesTakashi Iwai2011-03-091-0/+3
| | | | | | | | | | | | | Since OSS driver creates the device entries for /dev/audio* and /dev/dspW* by itself without coping with sound_core, it leads to conflicts with others and let sysfs spewing warnings. This patch rewrites the registration part of OSS driver to use the standard method also for additional minor devices. Reported-by: Steven Rostedt <rostedt@goodmis.org> (with ktest.pl) Tested-by: Steven Rostedt <rostedt@goodmis.org> (with ktest.pl) Signed-off-by: Takashi Iwai <tiwai@suse.de>
* BKL: remove extraneous #include <smp_lock.h>Arnd Bergmann2010-11-171-1/+0
| | | | | | | | | | The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* llseek: automatically add .llseek fopArnd Bergmann2010-10-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All file_operations should get a .llseek operation so we can make nonseekable_open the default for future file operations without a .llseek pointer. The three cases that we can automatically detect are no_llseek, seq_lseek and default_llseek. For cases where we can we can automatically prove that the file offset is always ignored, we use noop_llseek, which maintains the current behavior of not returning an error from a seek. New drivers should normally not use noop_llseek but instead use no_llseek and call nonseekable_open at open time. Existing drivers can be converted to do the same when the maintainer knows for certain that no user code relies on calling seek on the device file. The generated code is often incorrectly indented and right now contains comments that clarify for each added line why a specific variant was chosen. In the version that gets submitted upstream, the comments will be gone and I will manually fix the indentation, because there does not seem to be a way to do that using coccinelle. Some amount of new code is currently sitting in linux-next that should get the same modifications, which I will do at the end of the merge window. Many thanks to Julia Lawall for helping me learn to write a semantic patch that does all this. ===== begin semantic patch ===== // This adds an llseek= method to all file operations, // as a preparation for making no_llseek the default. // // The rules are // - use no_llseek explicitly if we do nonseekable_open // - use seq_lseek for sequential files // - use default_llseek if we know we access f_pos // - use noop_llseek if we know we don't access f_pos, // but we still want to allow users to call lseek // @ open1 exists @ identifier nested_open; @@ nested_open(...) { <+... nonseekable_open(...) ...+> } @ open exists@ identifier open_f; identifier i, f; identifier open1.nested_open; @@ int open_f(struct inode *i, struct file *f) { <+... ( nonseekable_open(...) | nested_open(...) ) ...+> } @ read disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ read_no_fpos disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { ... when != off } @ write @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ write_no_fpos @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { ... when != off } @ fops0 @ identifier fops; @@ struct file_operations fops = { ... }; @ has_llseek depends on fops0 @ identifier fops0.fops; identifier llseek_f; @@ struct file_operations fops = { ... .llseek = llseek_f, ... }; @ has_read depends on fops0 @ identifier fops0.fops; identifier read_f; @@ struct file_operations fops = { ... .read = read_f, ... }; @ has_write depends on fops0 @ identifier fops0.fops; identifier write_f; @@ struct file_operations fops = { ... .write = write_f, ... }; @ has_open depends on fops0 @ identifier fops0.fops; identifier open_f; @@ struct file_operations fops = { ... .open = open_f, ... }; // use no_llseek if we call nonseekable_open //////////////////////////////////////////// @ nonseekable1 depends on !has_llseek && has_open @ identifier fops0.fops; identifier nso ~= "nonseekable_open"; @@ struct file_operations fops = { ... .open = nso, ... +.llseek = no_llseek, /* nonseekable */ }; @ nonseekable2 depends on !has_llseek @ identifier fops0.fops; identifier open.open_f; @@ struct file_operations fops = { ... .open = open_f, ... +.llseek = no_llseek, /* open uses nonseekable */ }; // use seq_lseek for sequential files ///////////////////////////////////// @ seq depends on !has_llseek @ identifier fops0.fops; identifier sr ~= "seq_read"; @@ struct file_operations fops = { ... .read = sr, ... +.llseek = seq_lseek, /* we have seq_read */ }; // use default_llseek if there is a readdir /////////////////////////////////////////// @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier readdir_e; @@ // any other fop is used that changes pos struct file_operations fops = { ... .readdir = readdir_e, ... +.llseek = default_llseek, /* readdir is present */ }; // use default_llseek if at least one of read/write touches f_pos ///////////////////////////////////////////////////////////////// @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read.read_f; @@ // read fops use offset struct file_operations fops = { ... .read = read_f, ... +.llseek = default_llseek, /* read accesses f_pos */ }; @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, ... + .llseek = default_llseek, /* write accesses f_pos */ }; // Use noop_llseek if neither read nor write accesses f_pos /////////////////////////////////////////////////////////// @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; identifier write_no_fpos.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, .read = read_f, ... +.llseek = noop_llseek, /* read and write both use no f_pos */ }; @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write_no_fpos.write_f; @@ struct file_operations fops = { ... .write = write_f, ... +.llseek = noop_llseek, /* write uses no f_pos */ }; @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; @@ struct file_operations fops = { ... .read = read_f, ... +.llseek = noop_llseek, /* read uses no f_pos */ }; @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; @@ struct file_operations fops = { ... +.llseek = noop_llseek, /* no read or write fn */ }; ===== End semantic patch ===== Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Julia Lawall <julia@diku.dk> Cc: Christoph Hellwig <hch@infradead.org>
* sound: push BKL into open functionsArnd Bergmann2010-07-121-5/+1
| | | | | | | | | | | | | | | This moves the lock_kernel() call from soundcore_open to the individual OSS device drivers, where we can deal with it one driver at a time if needed, or just kill off the drivers. All core components in ALSA already provide adequate locking in their open()-functions and do not require the big kernel lock, so there is no need to add the BKL there. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* soundcore_open: Reduce the area BKL coverageJohn Kacur2010-07-051-5/+8
| | | | | | | | | | | | | | Most of this function is protected by the sound_loader_lock. We can push down the BKL to this call out err = file->f_op->open(inode,file); In order to build the sound core without the BKL, we will need to push the lock_kernel() call into the ~20 device drivers that register their file operations. Signed-off-by: John Kacur <jkacur@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: use subsys_initcall for sound core instead of module_initThadeu Lima de Souza Cascardo2010-01-141-1/+1
| | | | | | | | | | This is needed for built-in drivers which are built before the sound directory, like thinkpad_acpi. Otherwise, registering a card fails. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* tree-wide: fix assorted typos all over the placeAndré Goddard Rosa2009-12-041-1/+1
| | | | | | | | | | That is "success", "unknown", "through", "performance", "[re|un]mapping" , "access", "default", "reasonable", "[con]currently", "temperature" , "channel", "[un]used", "application", "example","hierarchy", "therefore" , "[over|under]flow", "contiguous", "threshold", "enough" and others. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* Driver-Core: extend devnode callbacks to provide permissionsKay Sievers2009-09-191-2/+2
| | | | | | | | | | | | | This allows subsytems to provide devtmpfs with non-default permissions for the device node. Instead of the default mode of 0600, null, zero, random, urandom, full, tty, ptmx now have a mode of 0666, which allows non-privileged processes to access standard device nodes in case no other userspace process applies the expected permissions. This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sound: make OSS device number claiming optional and schedule its removalTejun Heo2009-08-101-18/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If any OSS support is enabled, regardless of built-in or module, sound_core claims full OSS major number (that is, the old 0-255 region) to trap open attempts and request sound modules using custom module aliases. This feature is redundant as chrdev already has such mechanism. This preemptive claiming prevents alternative OSS implementation. The custom module aliases are scheduled to be removed and the previous patch made soundcore emit the standard chrdev aliases too to help transition. This patch schedule the feature for removal in a year and makes it optional so that developers and distros can try new things in the meantime without rebuilding the kernel. The pre-claiming can be turned off by using SOUND_OSS_CORE_PRECLAIM and/or kernel parameter soundcore.preclaim_oss. As this allows sound minors to be individually grabbed by other users, this patch updates sound_insert_unit() such that if registering individual device region fails, it tries the next available slot. For details on removal plan, please read the entry added by this patch in feature-removal-schedule.txt . Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* sound: request char-major-* module aliases for missing OSS devicesTejun Heo2009-08-101-0/+12
| | | | | | | | | | | | | | | Till now missing OSS devices emitted sound-slot/service-* module alises instead of the standard char-major-* if a missing device number is opened if soundcore is loaded. The custom module aliases don't have any inherent benefit than backward compatibility. sound-slot/service-* module aliases is scheduled to be removed and to help the transition this patch makes soundcore emit the standard module alises along with the custom ones. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* sound: do not set DEVNAME for OSS devicesKay Sievers2009-07-031-1/+4
| | | | | Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* Driver Core: sound: add nodename for sound driversKay Sievers2009-06-151-0/+7
| | | | | | | | | This adds support to the sound core to report the proper device name to userspace for their devices. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* ALSA: Fix declaration of sound_classMark Brown2008-12-151-0/+1
| | | | | | | | Include sound/core.h in sound_core.c so that sound_class is declared before it is defined, avoiding it looking like it should be static. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* sound/sound_core: Fix sparse warningsHannes Eder2008-11-211-3/+3
| | | | | | | | | | | | Fix the following sparse warnings: sound/sound_core.c:460:2: warning: returning void-valued expression sound/sound_core.c:477:2: warning: returning void-valued expression sound/sound_core.c:510:5: warning: symbol 'soundcore_open' was not declared. Should it be static? Signed-off-by: Hannes Eder <hannes@hanneseder.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
*-. Merge branches 'topic/fix/asoc', 'topic/fix/hda', 'topic/fix/misc' and ↵Takashi Iwai2008-10-271-1/+1
|\ \ | | | | | | | | | 'topic/pci-ioremap-bar' into for-linus
| | * sound: use a common working email addressAlan Cox2008-10-271-1/+1
| |/ | | | | | | | | Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* / device create: sound: convert device_create_drvdata to device_createGreg Kroah-Hartman2008-10-161-3/+2
|/ | | | | | | | | Now that device_create() has been audited, rename things back to the original call to be sane. Cc: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* ALSA: fix section mismatch in the sound_coreKrzysztof Helt2008-09-091-2/+2
| | | | | | | | | | | | The __exit cleanup_oss_soundcore() is called from the __init init_soundcore(). This causes section mismatch and breaks kernel's linking on sparc64. Remove the __exit attribute from the cleanup_oss_soundcore(). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
* sound: make OSS sound core optionalTejun Heo2008-08-291-19/+60
| | | | | | | | | | | | | | | | | | | | | | | | sound/sound_core.c implements soundcore.ko and contains two parts - sound_class which is shared by both ALSA and OSS and device redirection support for OSS. It's always compiled when any sound support is enabled although it's necessary only when OSS (the actual one or emulation) is enabled. This is slightly wasteful and as device redirection always registers character device region for major 14, it prevents alternative implementation. This patch introduces a new config SOUND_OSS_CORE which is selected iff OSS support is actually necessary and build the OSS core part conditionally. If OSS is disabled, soundcore merely contains sound_class but leaving it that way seems to be the simplest approach as otherwise sound_class should be in ALSA core file if OSS is disabled but should be in soundcore if OSS is enabled. Also, there's also the user confusion factor. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
* device create: sound: convert device_create to device_create_drvdataGreg Kroah-Hartman2008-07-211-2/+3
| | | | | | | | | device_create() is race-prone, so use the race-free device_create_drvdata() instead as device_create() is going away. Cc: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sound: cdev lock_kernel() pushdownJonathan Corbet2008-06-201-0/+5
| | | | Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* [PATCH] mark struct file_operations const 9Arjan van de Ven2007-02-121-1/+1
| | | | | | | | | | | Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Driver core: convert sound core to use struct deviceGreg Kroah-Hartman2006-12-011-3/+3
| | | | | | | | | | | | | | | | | | | | Converts from using struct "class_device" to "struct device" making everything show up properly in /sys/devices/ with symlinks from the /sys/class directory. It also makes the struct sound_card to show up as a "real" device where all the different sound class devices are placed as childs and different card attribute files can hang off of. /sys/class/sound is still a flat directory, but the symlink targets of all devices belonging to the same card, point the the /sys/devices tree below the new card device object. Thanks to Kay for the updates to this patch. Signed-off-by: Kay Sievers <kay.sievers@novell.com> Acked-by: Jaroslav Kysela <perex@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] The scheduled removal of some OSS driversAdrian Bunk2006-10-041-34/+0
| | | | | | | | | | | | | This patch contains the scheduled removal of OSS drivers that: - have ALSA drivers for the same hardware without known regressions and - whose Kconfig options have been removed in 2.6.17. [michal.k.k.piotrowski@gmail.com: build fix] Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] build sound/sound_firmware.c only for OSSAdrian Bunk2006-09-291-4/+0
| | | | | | | | | | | | | | | | All sound/sound_firmware.c contains is mod_firmware_load() that is a legacy API only used by some OSS drivers. This patch builds it into an own sound_firmware module that is only built depending on CONFIG_SOUND_PRIME making the kernel slightly smaller for ALSA users. [alan@lxorguk.ukuu.org.uk: comment fix] Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] devfs: Remove devfs support from the sound subsystemGreg Kroah-Hartman2006-06-261-6/+0
| | | | Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] mark f_ops const in the inodeArjan van de Ven2006-03-281-11/+11
| | | | | | | | | | | Mark the f_ops members of inodes as const, as well as fix the ripple-through this causes by places that copy this f_ops and then "do stuff" with it. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Driver Core: fix up all callers of class_device_create()Greg Kroah-Hartman2005-10-281-1/+1
| | | | | | | | The previous patch adding the ability to nest struct class_device changed the paramaters to the call class_device_create(). This patch fixes up all in-kernel users of the function. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Assign device pointer to OSS devicesTakashi Iwai2005-08-301-9/+18
| | | | | | | Add register_sound_special_device() function to allow assignment of device pointer to a specific OSS device for HAL. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* [PATCH] class: convert sound/* to use the new class api instead of class_simplegregkh@suse.de2005-06-201-5/+5
| | | | Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+583
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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