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* platform: goldfish: Allow goldfish drivers for archs with IOMEM and DMAAnup Patel2019-10-101-2/+1
| | | | | | | | | | We don't need explicit dependency of Goldfish kconfig option on various architectures. Instead, the Goldfish kconfig option should only depend on HAS_IOMEM and HAS_DMA which is sufficient for all Goldfish devices. Signed-off-by: Anup Patel <anup.patel@wdc.com> Link: https://lore.kernel.org/r/20190925063706.56175-2-anup.patel@wdc.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner2019-05-212-0/+2
| | | | | | | | | | | | | | Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mm/gup: change GUP fast to use flags rather than a write 'bool'Ira Weiny2019-05-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To facilitate additional options to get_user_pages_fast() change the singular write parameter to be gup_flags. This patch does not change any functionality. New functionality will follow in subsequent patches. Some of the get_user_pages_fast() call sites were unchanged because they already passed FOLL_WRITE or 0 for the write parameter. NOTE: It was suggested to change the ordering of the get_user_pages_fast() arguments to ensure that callers were converted. This breaks the current GUP call site convention of having the returned pages be the final parameter. So the suggestion was rejected. Link: http://lkml.kernel.org/r/20190328084422.29911-4-ira.weiny@intel.com Link: http://lkml.kernel.org/r/20190317183438.2057-4-ira.weiny@intel.com Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Mike Marshall <hubcap@omnibond.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers: platform: goldfish: fix the checkpatch complain in KconfigRoman Kiryanov2019-01-221-2/+2
| | | | | | | prefer 'help' over '---help---' for new help texts Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Remove 'type' argument from access_ok() functionLinus Torvalds2019-01-031-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument of the user address range verification function since we got rid of the old racy i386-only code to walk page tables by hand. It existed because the original 80386 would not honor the write protect bit when in kernel mode, so you had to do COW by hand before doing any user access. But we haven't supported that in a long time, and these days the 'type' argument is a purely historical artifact. A discussion about extending 'user_access_begin()' to do the range checking resulted this patch, because there is no way we're going to move the old VERIFY_xyz interface to that model. And it's best done at the end of the merge window when I've done most of my merges, so let's just get this done once and for all. This patch was mostly done with a sed-script, with manual fix-ups for the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form. There were a couple of notable cases: - csky still had the old "verify_area()" name as an alias. - the iter_iov code had magical hardcoded knowledge of the actual values of VERIFY_{READ,WRITE} (not that they mattered, since nothing really used it) - microblaze used the type argument for a debug printout but other than those oddities this should be a total no-op patch. I tried to fix up all architectures, did fairly extensive grepping for access_ok() uses, and the changes are trivial, but I may have missed something. Any missed conversion should be trivially fixable, though. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* platform: goldfish: pipe: Add a blank line to separate varibles and codeRoman Kiryanov2018-10-151-0/+1
| | | | | | | checkpacth: Missing a blank line after declarations Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove redundant castingRoman Kiryanov2018-10-151-1/+1
| | | | | | | This casting is not required. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Call misc_deregister if init failsRoman Kiryanov2018-10-151-1/+4
| | | | | | | | Undo effects of misc_register if driver's init fails after misc_register. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Move the file-scope goldfish_pipe_dev variable ↵Roman Kiryanov2018-10-151-29/+37
| | | | | | | | | | | | into the driver state This is the last patch in the series of patches to move file-scope variables into the driver state. This change will help to introduce another version of the pipe driver (with different state) for the older host interface or having several instances of this device. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Move the file-scope goldfish_pipe_miscdev variable ↵Roman Kiryanov2018-10-151-7/+13
| | | | | | | | | | | | into the driver state This is a series of patches to move mutable file-scope variables into the driver state. This change will help to introduce another version of the pipe driver (with different state) for the older host interface or having several instances of this device. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Move the file-scope goldfish_interrupt_tasklet ↵Roman Kiryanov2018-10-151-8/+16
| | | | | | | | | | | | variable into the driver state This is a series of patches to move mutable file-scope variables into the driver state. This change will help to introduce another version of the pipe driver (with different state) for the older host interface or having several instances of this device. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Make symbol 'goldfish_pipe_dev' staticWei Yongjun2018-09-251-1/+1
| | | | | | | | | | Fixes the following sparse warning: drivers/platform/goldfish/goldfish_pipe.c:214:26: warning: symbol 'goldfish_pipe_dev' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove redundant header includeRoman Kiryanov2018-09-251-1/+0
| | | | | | | No symbols were used from this header. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove redundant struct declarationsRoman Kiryanov2018-09-251-2/+0
| | | | | | | | goldfish_pipe_command is defines just after declaration and nothing refers to goldfish_pipe before it is defined. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove a redundant blank lineRoman Kiryanov2018-09-251-1/+0
| | | | | | | The blank line is not required there. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Prevent memory corruption from several threads ↵Roman Kiryanov2018-09-251-10/+14
| | | | | | | | | | | | writing to the same variable Move the "pages" buffer into "struct goldfish_pipe". Since we are locking the mutex on the pipe in transfer_max_buffers, other threads willnot be able to write into it, but other pipe instances could be served because they have its own buffer. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove license boilerplateRoman Kiryanov2018-09-251-14/+0
| | | | | | | | The boilerplate license is not necessary when the SPDX line is present. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Replace "x==NULL" to "!x"Roman Kiryanov2018-09-141-5/+5
| | | | | | | checkpatch: Comparison to NULL could be written "!x" Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Move logical ops to the end of the prev lineRoman Kiryanov2018-09-141-2/+2
| | | | | | | checkpatch: Logical continuations should be on the previous line Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Fix alignment to match parenthesisRoman Kiryanov2018-09-141-35/+48
| | | | | | | checkpatch: Alignment should match open parenthesis. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Fix lines to not end an opening bracketRoman Kiryanov2018-09-141-4/+3
| | | | | | | checkpatch: Lines should not end with a '(' or '[' Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Rename goldfish_x to goldfish_pipe_xRoman Kiryanov2018-09-141-8/+9
| | | | | | | Add "pipe" to the pipe related function names. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove reduntant casting to (void)Roman Kiryanov2018-09-141-2/+2
| | | | | | | Casting to (void) is no-op. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Rename 'wakeBit' to 'wake_bit'Roman Kiryanov2018-09-141-4/+4
| | | | | | | checkpatch: Avoid CamelCase Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove a blank line before '}'Roman Kiryanov2018-09-141-1/+1
| | | | | | | checkpatch: Blank lines aren't necessary before a close brace '}' Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove reduntant castingRoman Kiryanov2018-09-141-1/+1
| | | | | | | Casting to u32 is not required here. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Replace two code blocks with a function callRoman Kiryanov2018-09-141-16/+19
| | | | | | | | Two function calls look cleaner because the function introduces takes case of all bit shifting and casting. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Remove a redundant variableRoman Kiryanov2018-09-141-4/+3
| | | | | | | The variable was not very useful. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Add blank lines to separate struct membersRoman Kiryanov2018-09-141-0/+3
| | | | | | | | To improve readability and to be consistent with other struct members. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Replace pr_ with dev_ for loggingRoman Kiryanov2018-09-141-1/+6
| | | | | | | dev_ is preferred if struct device is available. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Replace an array of 1 with a variableRoman Kiryanov2018-09-141-15/+13
| | | | | | | There is no reason to have an array of 1. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Fail compilation if structs are too largeRoman Kiryanov2018-09-141-6/+3
| | | | | | | | | Since the driver provides no workaround prevent in cases if structs do no fit into a memory page, it is better to fail complation to find about the issue earlt instead of returning errors at runtime. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Update the comment for GFP_ATOMICRoman Kiryanov2018-09-141-1/+4
| | | | | | | | Provide an explanation why GFP_ATOMIC is needed to prevent changing it to other values. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Separate the host interface to a separate headerRoman Kiryanov2018-09-142-68/+113
| | | | | | | | These are several enums that must kept in sync with the host side. This change explicitly separates them into a dedicated header file. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Move an opening brace to the next lineRoman Kiryanov2018-09-141-1/+2
| | | | | | | | checkpatch: Function's opening brace has to be at the beginning of the next line. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Update licenseRoman Kiryanov2018-09-141-1/+2
| | | | | | | goldfish_pipe is distributed under GPL v2. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: Fix comments to fit 80 columnsRoman Kiryanov2018-09-141-4/+7
| | | | | | | Some comment lines are longer than 80 symbols. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: Retire pdev_busRoman Kiryanov2018-08-023-238/+0
| | | | | | | Not used by goldfish. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* headers: separate linux/mod_devicetable.h from linux/platform_device.hRandy Dunlap2018-07-071-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | At over 4000 #includes, <linux/platform_device.h> is the 9th most #included header file in the Linux kernel. It does not need <linux/mod_devicetable.h>, so drop that header and explicitly add <linux/mod_devicetable.h> to source files that need it. 4146 #include <linux/platform_device.h> After this patch, there are 225 files that use <linux/mod_devicetable.h>, for a reduction of around 3900 times that <linux/mod_devicetable.h> does not have to be read & parsed. 225 #include <linux/mod_devicetable.h> This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/ Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* goldfish_pipe: make tasklet goldfish_interrupt_tasklet staticColin Ian King2018-07-031-1/+1
| | | | | | | | | | | Tasklet goldfish_interrupt_tasklet is local to the source and does not need to be in global scope, so make it static. Cleans up sparse warning: symbol 'goldfish_interrupt_tasklet' was not declared. Should it be static? Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vfs: do bulk POLL* -> EPOLL* replacementLinus Torvalds2018-02-111-4/+4
| | | | | | | | | | | | | | | | | | | | | | | This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* the rest of drivers/*: annotate ->poll() instancesAl Viro2017-11-281-2/+2
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge 4.12-rc5 into char-misc-nextGreg Kroah-Hartman2017-06-121-1/+1
|\ | | | | | | | | | | We want the char/misc driver fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * goldfish_pipe: use GFP_ATOMIC under spin lockWei Yongjun2017-05-251-1/+1
| | | | | | | | | | | | | | | | | | The function get_free_pipe_id_locked() is called from goldfish_pipe_open() with a lock is held, so we should use GFP_ATOMIC instead of GFP_KERNEL. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | goldfish_pipe: make pipe_dev staticColin Ian King2017-05-251-1/+1
|/ | | | | | | | | | | | | Make this static as it's only referenced in this source and it does not need global scope. Cleans up a sparse warning: drivers/platform/goldfish/goldfish_pipe.c: warning: symbol 'pipe_dev' was not declared. Should it be static? Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* goldfish_pipe: fix build warning about using too much stack.Greg Kroah-Hartman2017-04-261-3/+3
| | | | | | | | | | | The new goldfish_pipe code used too much stack space in the transfer_max_buffers() call. As the function is serialized with a lock, let's make the buffer static to not use the stack for the large buffer. Reported-by: kbuild test robot <fengguang.wu@intel.com> Cc: Yurii Zubrytskyi <zyy@google.com> Cc: Jin Qian <jinqian@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* goldfish_pipe: An implementation of more parallel pipeJin Qian2017-04-261-329/+641
| | | | | | | | | | | | | | | | | | | | | This is a driver code for a redesigned android pipe. Currently it works for x86 and x64 emulators with the following performance results: ADB push to /dev/null, Ubuntu, 400 MB file, times are for (1 / 10 / 100) parallel adb commands x86 adb push: (4.4s / 11.5s / 2m10s) -> (2.8s / 6s / 51s) x64 adb push: (7s / 15s / (too long, 6m+) -> (2.7s / 6.2s / 52s) ADB pull and push to /data/ have the same %% of speedup More importantly, I don't see any signs of slowdowns when run in parallel with Antutu benchmark, so it is definitely making much better job at multithreading. Signed-off-by: Yurii Zubrytskyi <zyy@google.com> Signed-off-by: Jin Qian <jinqian@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* goldfish: Sanitize the broken interrupt handlerThomas Gleixner2017-02-151-5/+8
| | | | | | | | | | | | | | | | | | | | | | This interrupt handler is broken in several ways: - It loops forever when the op code is not decodeable - It never returns IRQ_HANDLED because the only way to exit the loop returns IRQ_NONE unconditionally. The whole concept of this is broken. Creating devices in an interrupt handler is beyond any point of sanity. Make it at least behave halfways sane so accidental users do not have to deal with a hard to debug lockup. Fixes: e809c22b8fb028 ("goldfish: add the goldfish virtual bus") Reported-by: Gabriel C <nix.or.die@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* platform: goldfish: pipe: use get_user_pages_unlocked()Lorenzo Stoakes2016-11-101-4/+2
| | | | | | | | Moving from get_user_pages() to get_user_pages_unlocked() simplifies the code and takes advantage of VM_FAULT_RETRY functionality when faulting in pages. Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mm: replace get_user_pages() write/force parameters with gup_flagsLorenzo Stoakes2016-10-191-1/+2
| | | | | | | | | | | | | | This removes the 'write' and 'force' from get_user_pages() and replaces them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers as use of this flag can result in surprising behaviour (and hence bugs) within the mm subsystem. Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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