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* gcov: reuse kbasename helperAndy Shevchenko2013-11-131-4/+3
| | | | | | | | | | To get name of the file from a pathname let's use kbasename() helper. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/gcov/fs.c: use pr_warn()Andrew Morton2013-11-131-17/+17
| | | | | | | | | | | | | | pr_warning() is deprecated in favor of pr_warn() Cc: Andy Gospodarek <agospoda@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Frantisek Hrbata <fhrbata@redhat.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/module.c: use pr_foo()Andrew Morton2013-11-131-59/+44
| | | | | | | | | | | | | | kernel/module.c uses a mix of printk(KERN_foo and pr_foo(). Convert it all to pr_foo and make the offered cleanups. Not sure what to do about the printk(KERN_DEFAULT). We don't have a pr_default(). Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Joe Perches <joe@perches.com> Cc: Frantisek Hrbata <fhrbata@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* gcov: compile specific gcov implementation based on gcc versionFrantisek Hrbata2013-11-132-1/+61
| | | | | | | | | | | | | | Compile the correct gcov implementation file for the specific gcc version. Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Kees Cook <keescook@chromium.org> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Gospodarek <agospoda@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* gcov: add support for gcc 4.7 gcov formatFrantisek Hrbata2013-11-132-0/+566
| | | | | | | | | | | | | | | | | | | | | | | | | The gcov in-memory format changed in gcc 4.7. The biggest change, which requires this special implementation, is that gcov_info no longer contains array of counters for each counter type for all functions and gcov_fn_info is not used for mapping of function's counters to these arrays(offset). Now each gcov_fn_info contans it's counters, which makes things a little bit easier. This is heavily based on the previous gcc_3_4.c implementation and patches provided by Peter Oberparleiter. Specially the buffer gcda implementation for iterator. [akpm@linux-foundation.org: use kmemdup() and kcalloc()] [oberpar@linux.vnet.ibm.com: gcc_4_7.c needs vmalloc.h] Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Kees Cook <keescook@chromium.org> Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Gospodarek <agospoda@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* gcov: move gcov structs definitions to a gcc version specific fileFrantisek Hrbata2013-11-134-80/+153
| | | | | | | | | | | | | | | | | | | Since also the gcov structures(gcov_info, gcov_fn_info, gcov_ctr_info) can change between gcc releases, as shown in gcc 4.7, they cannot be defined in a common header and need to be moved to a specific gcc implemention file. This also requires to make the gcov_info structure opaque for the common code and to introduce simple helpers for accessing data inside gcov_info. Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Kees Cook <keescook@chromium.org> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Gospodarek <agospoda@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()Chen Gang2013-11-131-3/+5
| | | | | | | | | | | | | For registering in add_del_listener(), when kmalloc_node() fails, need return -ENOMEM instead of success code, and cmd_attr_register_cpumask() wants to know about it. After modification, give a simple common test "build -> boot up -> kernel/controllers/cgroup/getdelays by LTP tools". Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/taskstats.c: add nla_nest_cancel() for failure processing between ↵Chen Gang2013-11-131-2/+6
| | | | | | | | | | | | nla_nest_start() and nla_nest_end() When failure occurs between nla_nest_start() and nla_nest_end(), we should call nla_nest_cancel() to clean up related things. Signed-off-by: Chen Gang <gang.chen@asianux.com> Cc: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/sysctl_binary.c: use scnprintf() instead of snprintf()Chen Gang2013-11-131-3/+3
| | | | | | | | | | snprintf() will return the 'ideal' length which may be larger than real buffer length, if we only want to use real length, need use scnprintf() instead of. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/sysctl.c: check return value after call proc_put_char() in ↵Chen Gang2013-11-131-1/+4
| | | | | | | | | | | | __do_proc_doulongvec_minmax() Need to check the return value of proc_put_char(), as was done in __do_proc_doulongvec_minmax(). Signed-off-by: Chen Gang <gang.chen@asianux.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* exec/ptrace: fix get_dumpable() incorrect testsKees Cook2013-11-131-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The get_dumpable() return value is not boolean. Most users of the function actually want to be testing for non-SUID_DUMP_USER(1) rather than SUID_DUMP_DISABLE(0). The SUID_DUMP_ROOT(2) is also considered a protected state. Almost all places did this correctly, excepting the two places fixed in this patch. Wrong logic: if (dumpable == SUID_DUMP_DISABLE) { /* be protective */ } or if (dumpable == 0) { /* be protective */ } or if (!dumpable) { /* be protective */ } Correct logic: if (dumpable != SUID_DUMP_USER) { /* be protective */ } or if (dumpable != 1) { /* be protective */ } Without this patch, if the system had set the sysctl fs/suid_dumpable=2, a user was able to ptrace attach to processes that had dropped privileges to that user. (This may have been partially mitigated if Yama was enabled.) The macros have been moved into the file that declares get/set_dumpable(), which means things like the ia64 code can see them too. CVE-2013-2929 Reported-by: Vasily Kulikov <segoon@openwall.com> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: use KSYM_NAME_LEN to size identifier buffersJoe Mario2013-11-131-2/+2
| | | | | | | | | | | Use KSYM_NAME_LEN to size identifier buffers, so that it can be easier increased. Signed-off-by: Joe Mario <jmario@redhat.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* list: introduce list_next_entry() and list_prev_entry()Oleg Nesterov2013-11-131-3/+0
| | | | | | | | | | | | | | Add two trivial helpers list_next_entry() and list_prev_entry(), they can have a lot of users including list.h itself. In fact the 1st one is already defined in events/core.c and bnx2x_sp.c, so the patch simply moves the definition to list.h. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Eilon Greenstein <eilong@broadcom.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* printk.c: comments should refer to /proc/vmcore instead of /proc/vmcoreinfoDirk Gouders2013-11-131-2/+2
| | | | | | | | | In one of those comments a typo was fixed, too. Signed-off-by: Dirk Gouders <dirk@gouders.net> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/printk/printk.c: enable boot delay for earlyprintkDave Young2013-11-131-2/+2
| | | | | | | | | | | boot_delay does not work for earlyprintk because the kernel cmdline parsing is late. Change to use early_param so early kernel messages can also be delayed. Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/printk/printk.c: convert to pr_foo()Andrew Morton2013-11-131-6/+6
| | | | | | | | | | | | It was half-and-half. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Joe Perches <joe@perches.com> Cc: Kees Cook <keescook@chromium.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* printk: report console names during cut-overKees Cook2013-11-131-10/+9
| | | | | | | | | | | | | | | This reports the names of consoles as they're being disabled to help identify which is which during cut-over. Helps answer the question "which boot console actually got activated?" once the regular console is running, mostly when debugging boot console failures. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Tejun Heo <tj@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/sys.c: remove obsolete #include <linux/kexec.h>Geert Uytterhoeven2013-11-131-1/+0
| | | | | | | | | | | | Commit 15d94b82565e ("reboot: move shutdown/reboot related functions to kernel/reboot.c") moved all kexec-related functionality to kernel/reboot.c, so kernel/sys.c no longer needs to include <linux/kexec.h>. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Robin Holt <holt@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/delayacct.c: remove redundant checking in __delayacct_add_tsk()Chen Gang2013-11-131-7/+0
| | | | | | | | | | | | The wrapper function delayacct_add_tsk() already checked 'tsk->delays', and __delayacct_add_tsk() has no another direct callers, so can remove the redundancy checking code. And the label 'done' is also useless, so remove it, too. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cpu/mem hotplug: add try_online_node() for cpu_up()Toshi Kani2013-11-131-26/+3
| | | | | | | | | | | | | | | | | | | | | | cpu_up() has #ifdef CONFIG_MEMORY_HOTPLUG code blocks, which call mem_online_node() to put its node online if offlined and then call build_all_zonelists() to initialize the zone list. These steps are specific to memory hotplug, and should be managed in mm/memory_hotplug.c. lock_memory_hotplug() should also be held for the whole steps. For this reason, this patch replaces mem_online_node() with try_online_node(), which performs the whole steps with lock_memory_hotplug() held. try_online_node() is named after try_offline_node() as they have similar purpose. There is no functional change in this patch. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kthread: make kthread_create() killableTetsuo Handa2013-11-131-18/+55
| | | | | | | | | | | | | | | | | | | | | Any user process callers of wait_for_completion() except global init process might be chosen by the OOM killer while waiting for completion() call by some other process which does memory allocation. See CVE-2012-4398 "kernel: request_module() OOM local DoS" can happen. When such users are chosen by the OOM killer when they are waiting for completion() in TASK_UNINTERRUPTIBLE, the system will be kept stressed due to memory starvation because the OOM killer cannot kill such users. kthread_create() is one of such users and this patch fixes the problem for kthreadd by making kthread_create() killable - the same approach used for fixing CVE-2012-4398. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Oleg Nesterov <oleg@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'devicetree-for-3.13' of ↵Linus Torvalds2013-11-121-7/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: "DeviceTree updates for 3.13. This is a bit larger pull request than usual for this cycle with lots of clean-up. - Cross arch clean-up and consolidation of early DT scanning code. - Clean-up and removal of arch prom.h headers. Makes arch specific prom.h optional on all but Sparc. - Addition of interrupts-extended property for devices connected to multiple interrupt controllers. - Refactoring of DT interrupt parsing code in preparation for deferred probe of interrupts. - ARM cpu and cpu topology bindings documentation. - Various DT vendor binding documentation updates" * tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits) powerpc: add missing explicit OF includes for ppc dt/irq: add empty of_irq_count for !OF_IRQ dt: disable self-tests for !OF_IRQ of: irq: Fix interrupt-map entry matching MIPS: Netlogic: replace early_init_devtree() call of: Add Panasonic Corporation vendor prefix of: Add Chunghwa Picture Tubes Ltd. vendor prefix of: Add AU Optronics Corporation vendor prefix of/irq: Fix potential buffer overflow of/irq: Fix bug in interrupt parsing refactor. of: set dma_mask to point to coherent_dma_mask of: add vendor prefix for PHYTEC Messtechnik GmbH DT: sort vendor-prefixes.txt of: Add vendor prefix for Cadence of: Add empty for_each_available_child_of_node() macro definition arm/versatile: Fix versatile irq specifications. of/irq: create interrupts-extended property microblaze/pci: Drop PowerPC-ism from irq parsing of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code. of/irq: Use irq_of_parse_and_map() ...
| * of/irq: simplify args to irq_create_of_mappingGrant Likely2013-10-241-7/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All the callers of irq_create_of_mapping() pass the contents of a struct of_phandle_args structure to the function. Since all the callers already have an of_phandle_args pointer, why not pass it directly to irq_create_of_mapping()? Signed-off-by: Grant Likely <grant.likely@linaro.org> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Tony Lindgren <tony@atomide.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | Merge branch 'x86-uv-for-linus' of ↵Linus Torvalds2013-11-124-3/+40
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 UV debug changes from Ingo Molnar: "Various SGI UV debuggability improvements, amongst them KDB support, with related core KDB enabling patches changing kernel/debug/kdb/" * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Revert "x86/UV: Add uvtrace support" x86/UV: Add call to KGDB/KDB from NMI handler kdb: Add support for external NMI handler to call KGDB/KDB x86/UV: Check for alloc_cpumask_var() failures properly in uv_nmi_setup() x86/UV: Add uvtrace support x86/UV: Add kdump to UV NMI handler x86/UV: Add summary of cpu activity to UV NMI handler x86/UV: Update UV support for external NMI signals x86/UV: Move NMI support
| * | kdb: Add support for external NMI handler to call KGDB/KDBMike Travis2013-10-034-3/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a kgdb_nmicallin() interface that can be used by external NMI handlers to call the KGDB/KDB handler. The primary need for this is for those types of NMI interrupts where all the CPUs have already received the NMI signal. Therefore no send_IPI(NMI) is required, and in fact it will cause a 2nd unhandled NMI to occur. This generates the "Dazed and Confuzed" messages. Since all the CPUs are getting the NMI at roughly the same time, it's not guaranteed that the first CPU that hits the NMI handler will manage to enter KGDB and set the dbg_master_lock before the slaves start entering. The new argument "send_ready" was added for KGDB to signal the NMI handler to release the slave CPUs for entry into KGDB. Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Jason Wessel <jason.wessel@windriver.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Reviewed-by: Hedi Berriche <hedi@sgi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Link: http://lkml.kernel.org/r/20131002151417.928886849@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | Merge branch 'x86-boot-for-linus' of ↵Linus Torvalds2013-11-121-1/+6
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 boot changes from Ingo Molnar: "Two changes that prettify and compactify the SMP bootup output from: smpboot: Booting Node 0, Processors #1 #2 #3 OK smpboot: Booting Node 1, Processors #4 #5 #6 #7 OK smpboot: Booting Node 2, Processors #8 #9 #10 #11 OK smpboot: Booting Node 3, Processors #12 #13 #14 #15 OK Brought up 16 CPUs to something like: x86: Booting SMP configuration: .... node #0, CPUs: #1 #2 #3 .... node #1, CPUs: #4 #5 #6 #7 .... node #2, CPUs: #8 #9 #10 #11 .... node #3, CPUs: #12 #13 #14 #15 x86: Booted up 4 nodes, 16 CPUs" * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/boot: Further compress CPUs bootup message x86: Improve the printout of the SMP bootup CPU table
| * | | x86/boot: Further compress CPUs bootup messageBorislav Petkov2013-10-011-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Turn it into (for example): [ 0.073380] x86: Booting SMP configuration: [ 0.074005] .... node #0, CPUs: #1 #2 #3 #4 #5 #6 #7 [ 0.603005] .... node #1, CPUs: #8 #9 #10 #11 #12 #13 #14 #15 [ 1.200005] .... node #2, CPUs: #16 #17 #18 #19 #20 #21 #22 #23 [ 1.796005] .... node #3, CPUs: #24 #25 #26 #27 #28 #29 #30 #31 [ 2.393005] .... node #4, CPUs: #32 #33 #34 #35 #36 #37 #38 #39 [ 2.996005] .... node #5, CPUs: #40 #41 #42 #43 #44 #45 #46 #47 [ 3.600005] .... node #6, CPUs: #48 #49 #50 #51 #52 #53 #54 #55 [ 4.202005] .... node #7, CPUs: #56 #57 #58 #59 #60 #61 #62 #63 [ 4.811005] .... node #8, CPUs: #64 #65 #66 #67 #68 #69 #70 #71 [ 5.421006] .... node #9, CPUs: #72 #73 #74 #75 #76 #77 #78 #79 [ 6.032005] .... node #10, CPUs: #80 #81 #82 #83 #84 #85 #86 #87 [ 6.648006] .... node #11, CPUs: #88 #89 #90 #91 #92 #93 #94 #95 [ 7.262005] .... node #12, CPUs: #96 #97 #98 #99 #100 #101 #102 #103 [ 7.865005] .... node #13, CPUs: #104 #105 #106 #107 #108 #109 #110 #111 [ 8.466005] .... node #14, CPUs: #112 #113 #114 #115 #116 #117 #118 #119 [ 9.073006] .... node #15, CPUs: #120 #121 #122 #123 #124 #125 #126 #127 [ 9.679901] x86: Booted up 16 nodes, 128 CPUs and drop useless elements. Change num_digits() to hpa's division-avoiding, cell-phone-typed version which he went at great lengths and pains to submit on a Saturday evening. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: huawei.libin@huawei.com Cc: wangyijing@huawei.com Cc: fenghua.yu@intel.com Cc: guohanjun@huawei.com Cc: paul.gortmaker@windriver.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20130930095624.GB16383@pd.tnic Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | Merge branch 'timers-core-for-linus' of ↵Linus Torvalds2013-11-1210-84/+107
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer changes from Ingo Molnar: "Main changes in this cycle were: - Updated full dynticks support. - Event stream support for architected (ARM) timers. - ARM clocksource driver updates. - Move arm64 to using the generic sched_clock framework & resulting cleanup in the generic sched_clock code. - Misc fixes and cleanups" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (50 commits) x86/time: Honor ACPI FADT flag indicating absence of a CMOS RTC clocksource: sun4i: remove IRQF_DISABLED clocksource: sun4i: Report the minimum tick that we can program clocksource: sun4i: Select CLKSRC_MMIO clocksource: Provide timekeeping for efm32 SoCs clocksource: em_sti: convert to clk_prepare/unprepare time: Fix signedness bug in sysfs_get_uname() and its callers timekeeping: Fix some trivial typos in comments alarmtimer: return EINVAL instead of ENOTSUPP if rtcdev doesn't exist clocksource: arch_timer: Do not register arch_sys_counter twice timer stats: Add a 'Collection: active/inactive' line to timer usage statistics sched_clock: Remove sched_clock_func() hook arch_timer: Move to generic sched_clock framework clocksource: tcb_clksrc: Remove IRQF_DISABLED clocksource: tcb_clksrc: Improve driver robustness clocksource: tcb_clksrc: Replace clk_enable/disable with clk_prepare_enable/disable_unprepare clocksource: arm_arch_timer: Use clocksource for suspend timekeeping clocksource: dw_apb_timer_of: Mark a few more functions as __init clocksource: Put nodes passed to CLOCKSOURCE_OF_DECLARE callbacks centrally arm: zynq: Enable arm_global_timer ...
| * | | | time: Fix signedness bug in sysfs_get_uname() and its callersPatrick Palka2013-10-183-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sysfs_get_uname() is erroneously declared as returning size_t even though it may return a negative value, specifically -EINVAL. Its callers then check whether its return value is less than zero and indeed that is never the case for size_t. This patch changes sysfs_get_uname() to return ssize_t and makes sure its callers use ssize_t accordingly. Signed-off-by: Patrick Palka <patrick@parcs.ath.cx> [jstultz: Didn't apply cleanly, as a similar partial fix was also applied so had to resolve the collisions] Signed-off-by: John Stultz <john.stultz@linaro.org>
| * | | | timekeeping: Fix some trivial typos in commentsXie XiuQi2013-10-181-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix some typos in timekeeping comments. Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com> [jstultz: Commit message tweaks] Signed-off-by: John Stultz <john.stultz@linaro.org>
| * | | | alarmtimer: return EINVAL instead of ENOTSUPP if rtcdev doesn't existKOSAKI Motohiro2013-10-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fedora Ruby maintainer reported latest Ruby doesn't work on Fedora Rawhide on ARM. (http://bugs.ruby-lang.org/issues/9008) Because of, commit 1c6b39ad3f (alarmtimers: Return -ENOTSUPP if no RTC device is present) intruduced to return ENOTSUPP when clock_get{time,res} can't find a RTC device. However this is incorrect. First, ENOTSUPP isn't exported to userland (ENOTSUP or EOPNOTSUP are the closest userland equivlents). Second, Posix and Linux man pages agree that clock_gettime and clock_getres should return EINVAL if clk_id argument is invalid. While the arugment that the clockid is valid, but just not supported on this hardware could be made, this is just a technicality that doesn't help userspace applicaitons, and only complicates error handling. Thus, this patch changes the code to use EINVAL. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: stable <stable@vger.kernel.org> #3.0 and up Reported-by: Vit Ondruch <v.ondruch@tiscali.cz> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> [jstultz: Tweaks to commit message to include full rational] Signed-off-by: John Stultz <john.stultz@linaro.org>
| * | | | timer stats: Add a 'Collection: active/inactive' line to timer usage statisticsDong Zhu2013-10-101-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We can enable/disable timer statistics collection via: echo [1|0] > /proc/timers_stats and it would be nice if apps had the ability to check what the current collection status is. This patch adds a 'Collection: active/inactive' line to display the current timer collection status. Also bump up the timer stats version to v0.3. Signed-off-by: Dong Zhu <bluezhudong@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20131010075618.GH2139@zhudong.nay.redhat.com [ Improved the changelog and the code. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | Merge branch 'fortglx/3.13/time' of ↵Ingo Molnar2013-10-102-10/+3
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/jstultz/linux into timers/core Pull more timekeeping items for v3.13 from John Stultz: * Small cleanup in the clocksource code. * Fix for rtc-pl031 to let it work with alarmtimers. * Move arm64 to using the generic sched_clock framework & resulting cleanup in the generic sched_clock code. Signed-off-by: Ingo Molnar <mingo@kernel.org>
| | * | | | sched_clock: Remove sched_clock_func() hookStephen Boyd2013-10-091-8/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nobody is using sched_clock_func() anymore now that sched_clock supports up to 64 bits. Remove the hook so that new code only uses sched_clock_register(). Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
| | * | | | clocksource: Fix 'ret' data type of sysfs_override_clocksource() and ↵Elad Wexler2013-09-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sysfs_unbind_clocksource() sysfs_override_clocksource(): The expression 'if (ret >= 0)' is always true. This will cause clocksource_select() to always run. Thus modified ret to be of type ssize_t. sysfs_unbind_clocksource(): The expression 'if (ret < 0)' is always false. So in case sysfs_get_uname() failed, the expression won't take an effect. Thus modified ret to be of type ssize_t. Signed-off-by: Elad Wexler <elad.wexler@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
| * | | | | Merge branch 'clockevents/3.13' of ↵Ingo Molnar2013-10-031-0/+1
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/dlezcano/linux into timers/core Pull (mostly) ARM clocksource driver updates from Daniel Lezcano: " - Soren Brinkmann added FEAT_PERCPU to a clock device when it is local per cpu. This feature prevents the clock framework to choose a per cpu timer as a broadcast timer. This problem arised when the ARM global timer is used when switching to the broadcast timer which is the case now on Xillinx with its cpuidle driver. - Stephen Boyd extended the generic sched_clock code to support 64bit counters and removes the setup_sched_clock deprecation, as that causes lots of warnings since there's still users in the arch/arm tree. He added also the CLOCK_SOURCE_SUSPEND_NONSTOP flag on the architected timer as they continue counting during suspend. - Uwe Kleine-König added some missing __init sections and consolidated the code by moving the of_node_put call from the drivers to the function clocksource_of_init. " Signed-off-by: Ingo Molnar <mingo@kernel.org>
| | * | | | | tick: broadcast: Deny per-cpu clockevents from being broadcast sourcesSoren Brinkmann2013-10-021-0/+1
| | |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On most ARM systems the per-cpu clockevents are truly per-cpu in the sense that they can't be controlled on any other CPU besides the CPU that they interrupt. If one of these clockevents were to become a broadcast source we will run into a lot of trouble because the broadcast source is enabled on the first CPU to go into deep idle (if that CPU suffers from FEAT_C3_STOP) and that could be a different CPU than what the clockevent is interrupting (or even worse the CPU that the clockevent interrupts could be offline). Theoretically it's possible to support per-cpu clockevents as the broadcast source but so far we haven't needed this and supporting it is rather complicated. Let's just deny the possibility for now until this becomes a reality (let's hope it never does!). Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Michal Simek <michal.simek@xilinx.com>
| * | | | | Merge branch 'timers/core' of ↵Ingo Molnar2013-10-031-1/+1
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/core Merge updated full dynticks support from Frederic Weisbecker: - support 32-bit systems (full dynticks was 64-bit only before) - support ARM Signed-off-by: Ingo Molnar <mingo@kernel.org>
| | * | | | | nohz: Drop generic vtime obsolete dependency on CONFIG_64BITKevin Hilman2013-09-301-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CONFIG_64BIT requirement on vtime can finally be removed since we now depend on HAVE_VIRT_CPU_ACCOUNTING_GEN which already takes care of the arch ability to handle nsecs based cputime_t safely. Signed-off-by: Kevin Hilman <khilman@linaro.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Arm Linux <linux-arm-kernel@lists.infradead.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| | * | | | | vtime: Add HAVE_VIRT_CPU_ACCOUNTING_GEN KconfigKevin Hilman2013-09-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With VIRT_CPU_ACCOUNTING_GEN, cputime_t becomes 64-bit. In order to use that feature, arch code should be audited to ensure there are no races in concurrent read/write of cputime_t. For example, reading/writing 64-bit cputime_t on some 32-bit arches may require multiple accesses for low and high value parts, so proper locking is needed to protect against concurrent accesses. Therefore, add CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN which arches can enable after they've been audited for potential races. This option is automatically enabled on 64-bit platforms. Feature requested by Frederic Weisbecker. Signed-off-by: Kevin Hilman <khilman@linaro.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Arm Linux <linux-arm-kernel@lists.infradead.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | | | | | Merge tag 'v3.12-rc3' into timers/coreIngo Molnar2013-10-0311-29/+126
| |\| | | | | | | |/ / / / | |/| | | | | | | | | | | | | | | | | | | | | | Merge Linux 3.12-rc3 - refresh the tree with the latest fixes before merging new bits. Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | Merge branch 'fortglx/3.12/time' into fortglx/3.13/timeJohn Stultz2013-09-162-1/+3
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge in the timekeeping changes that missed 3.12 Signed-off-by: John Stultz <john.stultz@linaro.org>
| | * | | | | ntp: Make periodic RTC update more reliableMiroslav Lichvar2013-08-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current code requires that the scheduled update of the RTC happens in the closest tick to the half of the second. This seems to be difficult to achieve reliably. The scheduled work may be missing the target time by a tick or two and be constantly rescheduled every second. Relax the limit to 10 ticks. As a typical RTC drifts in the 11-minute update interval by several milliseconds, this shouldn't affect the overall accuracy of the RTC much. Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
| | * | | | | clocksource: Fix !CONFIG_CLOCKSOURCE_WATCHDOG compilePrarit Bhargava2013-07-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If I explicitly disable the clocksource watchdog in the x86 Kconfig, the x86 kernel will not compile unless this is properly defined. Cc: John Stultz <john.stultz@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
| * | | | | | Merge branch 'fortglx/3.12/sched-clock64-base' into fortglx/3.13/timeJohn Stultz2013-09-162-65/+91
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge in 64bit sched_clock support that missed 3.12. Conflicts: kernel/time/sched_clock.c Signed-off-by: John.Stultz <john.stultz@linaro.org>
| | * | | | | | sched_clock: Add support for >32 bit sched_clockStephen Boyd2013-07-301-14/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ARM architected system counter has at least 56 usable bits. Add support for counters with more than 32 bits to the generic sched_clock implementation so we can increase the time between wakeups due to dealing with wrap-around on these devices while benefiting from the irqtime accounting and suspend/resume handling that the generic sched_clock code already has. On my system using 56 bits over 32 bits changes the wraparound time from a few minutes to an hour. For faster running counters (GHz range) this is even more important because we may not be able to execute the timer in time to deal with the wraparound if only 32 bits are used. We choose a maxsec value of 3600 seconds because we assume no system will go idle for more than an hour. In the future we may need to increase this value. Note: All users should switch over to the 64-bit read function so we can remove setup_sched_clock() in favor of sched_clock_register(). Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
| | * | | | | | sched_clock: Use an hrtimer instead of timerStephen Boyd2013-07-301-17/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the next patch we're going to increase the number of bits that the generic sched_clock can handle to be greater than 32. With more than 32 bits the wraparound time can be larger than what can fit into the units that msecs_to_jiffies takes (unsigned int). Luckily, the wraparound is initially calculated in nanoseconds which we can easily use with hrtimers, so switch to using an hrtimer. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> [jstultz: Fixup hrtimer intitialization order issue] Signed-off-by: John Stultz <john.stultz@linaro.org>
| | * | | | | | sched_clock: Use seqcount instead of rolling our ownStephen Boyd2013-07-301-19/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're going to increase the cyc value to 64 bits in the near future. Doing that is going to break the custom seqcount implementation in the sched_clock code because 64 bit numbers aren't guaranteed to be atomic. Replace the cyc_copy with a seqcount to avoid this problem. Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
| | * | | | | | clocksource: Extract max nsec calculation into separate functionStephen Boyd2013-07-301-15/+30
| | |/ / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need to calculate the same number in the clocksource code and the sched_clock code, so extract this code into its own function. We also drop the min_t and just use min() because the two types are the same. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
* | | | | | | Merge branch 'sched-core-for-linus' of ↵Linus Torvalds2013-11-1226-827/+2325
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler changes from Ingo Molnar: "The main changes in this cycle are: - (much) improved CONFIG_NUMA_BALANCING support from Mel Gorman, Rik van Riel, Peter Zijlstra et al. Yay! - optimize preemption counter handling: merge the NEED_RESCHED flag into the preempt_count variable, by Peter Zijlstra. - wait.h fixes and code reorganization from Peter Zijlstra - cfs_bandwidth fixes from Ben Segall - SMP load-balancer cleanups from Peter Zijstra - idle balancer improvements from Jason Low - other fixes and cleanups" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits) ftrace, sched: Add TRACE_FLAG_PREEMPT_RESCHED stop_machine: Fix race between stop_two_cpus() and stop_cpus() sched: Remove unnecessary iteration over sched domains to update nr_busy_cpus sched: Fix asymmetric scheduling for POWER7 sched: Move completion code from core.c to completion.c sched: Move wait code from core.c to wait.c sched: Move wait.c into kernel/sched/ sched/wait: Fix __wait_event_interruptible_lock_irq_timeout() sched: Avoid throttle_cfs_rq() racing with period_timer stopping sched: Guarantee new group-entities always have weight sched: Fix hrtimer_cancel()/rq->lock deadlock sched: Fix cfs_bandwidth misuse of hrtimer_expires_remaining sched: Fix race on toggling cfs_bandwidth_used sched: Remove extra put_online_cpus() inside sched_setaffinity() sched/rt: Fix task_tick_rt() comment sched/wait: Fix build breakage sched/wait: Introduce prepare_to_wait_event() sched/wait: Add ___wait_cond_timeout() to wait_event*_timeout() too sched: Remove get_online_cpus() usage sched: Fix race in migrate_swap_stop() ...
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