this code very fast #437
this code very fast #437
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Hi @ahmetilgin! Thanks for your contribution to the Linux kernel! Linux kernel development happens on mailing lists, rather than on GitHub - this GitHub repository is a read-only mirror that isn't used for accepting contributions. So that your change can become part of Linux, please email it to us as a patch. Sending patches isn't quite as simple as sending a pull request, but fortunately it is a well documented process. Here's what to do:
How do I format my contribution?The Linux kernel community is notoriously picky about how contributions are formatted and sent. Fortunately, they have documented their expectations. Firstly, all contributions need to be formatted as patches. A patch is a plain text document showing the change you want to make to the code, and documenting why it is a good idea. You can create patches with Secondly, patches need 'commit messages', which is the human-friendly documentation explaining what the change is and why it's necessary. Thirdly, changes have some technical requirements. There is a Linux kernel coding style, and there are licensing requirements you need to comply with. Both of these are documented in the Submitting Patches documentation that is part of the kernel. Note that you will almost certainly have to modify your existing git commits to satisfy these requirements. Don't worry: there are many guides on the internet for doing this. Who do I send my contribution to?The Linux kernel is composed of a number of subsystems. These subsystems are maintained by different people, and have different mailing lists where they discuss proposed changes. If you don't already know what subsystem your change belongs to, the
Make sure that your list of recipients includes a mailing list. If you can't find a more specific mailing list, then LKML - the Linux Kernel Mailing List - is the place to send your patches. It's not usually necessary to subscribe to the mailing list before you send the patches, but if you're interested in kernel development, subscribing to a subsystem mailing list is a good idea. (At this point, you probably don't need to subscribe to LKML - it is a very high traffic list with about a thousand messages per day, which is often not useful for beginners.) How do I send my contribution?Use For more information about using How do I get help if I'm stuck?Firstly, don't get discouraged! There are an enormous number of resources on the internet, and many kernel developers who would like to see you succeed. Many issues - especially about how to use certain tools - can be resolved by using your favourite internet search engine. If you can't find an answer, there are a few places you can turn:
If you get really, really stuck, you could try the owners of this bot, @daxtens and @ajdlinux. Please be aware that we do have full-time jobs, so we are almost certainly the slowest way to get answers! I sent my patch - now what?You wait. You can check that your email has been received by checking the mailing list archives for the mailing list you sent your patch to. Messages may not be received instantly, so be patient. Kernel developers are generally very busy people, so it may take a few weeks before your patch is looked at. Then, you keep waiting. Three things may happen:
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Happy hacking! This message was posted by a bot - if you have any questions or suggestions, please talk to my owners, @ajdlinux and @daxtens, or raise an issue at https://github.com/ajdlinux/KernelPRBot. |
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Also, hope you are kidding with this one.. 😅 |
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i think this should get merged in |
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@ItzLevvie Don't you think it's easier to read? It's now only one line of code! |
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@ahmetilgin The kernel is written in C. C isn't an interpreted language like JS. Instead, it is compiled. Empty characters and spaces don't affect execution speed. That being said: It looks much more readable than the current code. |
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Yes is dank agree |
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@Blaze349 The Linux kernel takes soooooo long to compile. This will increase compilation speed by removing all the unnecessary whitespace the compiler has to skip over. |
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@Jonathan50 is right. This code definitely very fast. But it can be improved. There is an empty line between the includes and code. Please fix
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@kylelamse Are you joking? Minifying a code doesn't make it 'readable'... In Javascript it's used to reduce bandwidth between server & the user, reduce page execution time & reduce file size @ahmetilgin don't bother wasting your time on the PR. This won't improve anything except for decreasing file size. Also, there are a lot of comments in the 'minified code' that you've not bothered to remove. But again don't bother about it. @Jonathan50 If a Linux kernel takes 'soo long to compile' then you need to invest in a better CPU like Xeon. Compiling Android or a kernel requires you to have more cores to speed up the compiling process. If you have less cores then it will take more time to compile. No one loves the code unless it's a sarcasm @ItzLevvie I do have to agree, this won't get accepted anyways because of contributing guidelines. So you don't have to worry about it. @dadur604 no he doesn't need any help.. he's just trying to make the community laugh by committing garbage code. @Blaze349 C is already fast enough... there's no need to do all the stuff the compiler will do it for you automatically or you can add some flags to optimise it. @thibmo I believe he's trying to make the community laugh. If it's serious then I would obliviously laugh even more. |
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@7bf70ec5 Linus Torvalds uses a Macbook Air so...yeah. Also, the kernel isn't written in C# 🤣 . It's written in C and a little Assembly. |
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@DizAzTor Should be easier. You no longer have to scroll through thousands of lines of code. Having it on one line just makes sense. |
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Wow, now that's some beautiful code aesthetics. Congrats |
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@DizAzTor why maintain when you can not maintain |
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Are you seriously kidding me?😂 |
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yes this is beautiful 10/10 |
@7bf70ec5 |
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I've never laughed at code so hard in my life. Thanks for that! Definitely a much needed contribution. Linus has nothing on this guy. Perhaps this should go into a new Linux for Comedy branch. |
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Thats just, thats's hmm what is it?..... It's ART :D Put it in a Museum. |
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10/10 best commit ever made (other than adding |
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This made me laugh so hard. I want Linus's reaction on this now. |
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Linus will say "f**k you" like when he told Nvidia ✌️ |
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Good job! |
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🍌 |
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It's take so Long journey to reach bottom 🤣. |
[ Upstream commit 86968ef ] Calling ceph_buffer_put() in __ceph_setxattr() may end up freeing the i_xattrs.prealloc_blob buffer while holding the i_ceph_lock. This can be fixed by postponing the call until later, when the lock is released. The following backtrace was triggered by fstests generic/117. BUG: sleeping function called from invalid context at mm/vmalloc.c:2283 in_atomic(): 1, irqs_disabled(): 0, pid: 650, name: fsstress 3 locks held by fsstress/650: #0: 00000000870a0fe8 (sb_writers#8){.+.+}, at: mnt_want_write+0x20/0x50 #1: 00000000ba0c4c74 (&type->i_mutex_dir_key#6){++++}, at: vfs_setxattr+0x55/0xa0 #2: 000000008dfbb3f2 (&(&ci->i_ceph_lock)->rlock){+.+.}, at: __ceph_setxattr+0x297/0x810 CPU: 1 PID: 650 Comm: fsstress Not tainted 5.2.0+ torvalds#437 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack+0x67/0x90 ___might_sleep.cold+0x9f/0xb1 vfree+0x4b/0x60 ceph_buffer_release+0x1b/0x60 __ceph_setxattr+0x2b4/0x810 __vfs_setxattr+0x66/0x80 __vfs_setxattr_noperm+0x59/0xf0 vfs_setxattr+0x81/0xa0 setxattr+0x115/0x230 ? filename_lookup+0xc9/0x140 ? rcu_read_lock_sched_held+0x74/0x80 ? rcu_sync_lockdep_assert+0x2e/0x60 ? __sb_start_write+0x142/0x1a0 ? mnt_want_write+0x20/0x50 path_setxattr+0xba/0xd0 __x64_sys_lsetxattr+0x24/0x30 do_syscall_64+0x50/0x1c0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff23514359a Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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Line 94 is too long. Please consider removing it entirely. |
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please close this very fake thread |
hlep i keep getting spam to how do i unsubscribe from linux ?? |
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@pgarig please review this. |
[ Upstream commit 86968ef ] Calling ceph_buffer_put() in __ceph_setxattr() may end up freeing the i_xattrs.prealloc_blob buffer while holding the i_ceph_lock. This can be fixed by postponing the call until later, when the lock is released. The following backtrace was triggered by fstests generic/117. BUG: sleeping function called from invalid context at mm/vmalloc.c:2283 in_atomic(): 1, irqs_disabled(): 0, pid: 650, name: fsstress 3 locks held by fsstress/650: #0: 00000000870a0fe8 (sb_writers#8){.+.+}, at: mnt_want_write+0x20/0x50 #1: 00000000ba0c4c74 (&type->i_mutex_dir_key#6){++++}, at: vfs_setxattr+0x55/0xa0 #2: 000000008dfbb3f2 (&(&ci->i_ceph_lock)->rlock){+.+.}, at: __ceph_setxattr+0x297/0x810 CPU: 1 PID: 650 Comm: fsstress Not tainted 5.2.0+ torvalds#437 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack+0x67/0x90 ___might_sleep.cold+0x9f/0xb1 vfree+0x4b/0x60 ceph_buffer_release+0x1b/0x60 __ceph_setxattr+0x2b4/0x810 __vfs_setxattr+0x66/0x80 __vfs_setxattr_noperm+0x59/0xf0 vfs_setxattr+0x81/0xa0 setxattr+0x115/0x230 ? filename_lookup+0xc9/0x140 ? rcu_read_lock_sched_held+0x74/0x80 ? rcu_sync_lockdep_assert+0x2e/0x60 ? __sb_start_write+0x142/0x1a0 ? mnt_want_write+0x20/0x50 path_setxattr+0xba/0xd0 __x64_sys_lsetxattr+0x24/0x30 do_syscall_64+0x50/0x1c0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff23514359a Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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2024: IS THIS REAL? |
DONT OR I'll send my penguin army to put a single // in front of your linux kernel source |
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the next step is to put everything in a single file. |
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staticintkernel_init(void*);externvoidinit_IRQ(void);externvoidfork_init(void);externvoidradix_tree_init(void);/**Debughelper:viathisflagweknowthatwearein'earlybootupcode'*whereonlythebootprocessorisrunningwithIRQdisabled.Thismeans*twothings-IRQmustnotbeenabledbeforetheflagisclearedandsome*operationswhicharenotallowedwithIRQdisabledareallowedwhilethe*flagisset.*/boolearly_boot_irqs_disabled__read_mostly;enumsystem_statessystem_state__read_mostly;EXPORT_SYMBOL(system_state);/**Bootcommand-linearguments*/#defineMAX_INIT_ARGSCONFIG_INIT_ENV_ARG_LIMIT#defineMAX_INIT_ENVSCONFIG_INIT_ENV_ARG_LIMITexternvoidtime_init(void);/*DefaultlatetimeinitisNULL.archscanoverridethislater.*/void(*__initdatalate_time_init)(void);/*Untouchedcommandlinesavedbyarch-specificcode.*/char__initdataboot_command_line[COMMAND_LINE_SIZE];/*Untouchedsavedcommandline(eg.for/proc)*/char*saved_command_line;/*Commandlineforparameterparsing*/staticchar*static_command_line;/*Commandlineforper-initcallparameterparsing*/staticchar*initcall_command_line;staticchar*execute_command;staticchar*ramdisk_execute_command;/**Usedtogeneratewarningsifstatic_keymanipulationfunctionsareused*beforejump_label_initiscalled.*/boolstatic_key_initialized__read_mostly;EXPORT_SYMBOL_GPL(static_key_initialized);/**Ifset,thisisanindicationtothedriversthatresettheunderlying*devicebeforegoingaheadwiththeinitializationotherwisedrivermight*relyontheBIOSandskiptheresetoperation.**Thisisusefulifkernelisbootinginanunreliableenvironment.*Forex.kdumpsituationwherepreviouskernelhascrashed,BIOShasbeen*skippedanddeviceswillbeinunknownstate.*/unsignedintreset_devices;EXPORT_SYMBOL(reset_devices);staticint__initset_reset_devices(char*str){reset_devices=1;return1;}__setup("reset_devices",set_reset_devices);staticconstchar*argv_init[MAX_INIT_ARGS+2]={"init",NULL,};constchar*envp_init[MAX_INIT_ENVS+2]={"HOME=/","TERM=linux",NULL,};staticconstchar*panic_later,*panic_param;externconststructobs_kernel_param__setup_start[],__setup_end[];staticbool__initobsolete_checksetup(char*line){conststructobs_kernel_param*p;boolhad_early_param=false;p=__setup_start;do{intn=strlen(p->str);if(parameqn(line,p->str,n)){if(p->early){/*Alreadydoneinparse_early_param?*(Needsexactmatchonparampart).*Keepiterating,aswecanhaveearly*paramsand__setupsofsamenames8(*/if(line[n]=='\0'||line[n]=='=')had_early_param=true;}elseif(!p->setup_func){pr_warn("Parameter%sisobsolete,ignored\n",p->str);returntrue;}elseif(p->setup_func(line+n))returntrue;}p++;}while(p<__setup_end);returnhad_early_param;}/**Thisshouldbeapprox2Bo*oMipstostart(noteinitialshift),andwill*stillworkevenifinitiallytoolarge,itwilljusttakeslightlylonger*/unsignedlongloops_per_jiffy=(1<<12);EXPORT_SYMBOL(loops_per_jiffy);staticint__initdebug_kernel(char*str){console_loglevel=CONSOLE_LOGLEVEL_DEBUG;return0;}staticint__initquiet_kernel(char*str){console_loglevel=CONSOLE_LOGLEVEL_QUIET;return0;}early_param("debug",debug_kernel);early_param("quiet",quiet_kernel);staticint__initloglevel(char*str){intnewlevel;/**Onlyupdateloglevelvaluewhenacorrectsettingwaspassed,*topreventblindcrashes(whenloglevelbeingsetto0)that*arequitehardtodebug*/if(get_option(&str,&newlevel)){console_loglevel=newlevel;return0;}return-EINVAL;}early_param("loglevel",loglevel);/*ChangeNULtermbackto"=",tomake"param"thewholestring.*/staticint__initrepair_env_string(char*param,char*val,constchar*unused,void*arg){if(val){/*param=valorparam="val"?*/if(val==param+strlen(param)+1)val[-1]='=';elseif(val==param+strlen(param)+2){val[-2]='=';memmove(val-1,val,strlen(val)+1);val--;}elseBUG();}return0;}/*Anythingafter--getshandedstraighttoinit.*/staticint__initset_init_arg(char*param,char*val,constchar*unused,void*arg){unsignedinti;if(panic_later)return0;repair_env_string(param,val,unused,NULL);for(i=0;argv_init[i];i++){if(i==MAX_INIT_ARGS){panic_later="init";panic_param=param;return0;}}argv_init[i]=param;return0;}/**Unknownbootoptionsgethandedtoinit,unlesstheylooklike*unusedparameters(modprobewillfindthemin/proc/cmdline).*/staticint__initunknown_bootoption(char*param,char*val,constchar*unused,void*arg){repair_env_string(param,val,unused,NULL);/*Handleobsolete-styleparameters*/if(obsolete_checksetup(param))return0;/*Unusedmoduleparameter.*/if(strchr(param,'.')&&(!val||strchr(param,'.')<val))return0;if(panic_later)return0;if(val){/*Environmentoption*/unsignedinti;for(i=0;envp_init[i];i++){if(i==MAX_INIT_ENVS){panic_later="env";panic_param=param;}if(!strncmp(param,envp_init[i],val-param))break;}envp_init[i]=param;}else{/*Commandlineoption*/unsignedinti;for(i=0;argv_init[i];i++){if(i==MAX_INIT_ARGS){panic_later="init";panic_param=param;}}argv_init[i]=param;}return0;}staticint__initinit_setup(char*str){unsignedinti;execute_command=str;/**IncaseLILOisgoingtobootuswithdefaultcommandline,*itprepends"auto"beforethewholecmdlinewhichmakes*theshellthinkitshouldexecuteascriptwithsuchname.*Soweignoreallargumentsentered_before_init=...[MJ]*/for(i=1;i<MAX_INIT_ARGS;i++)argv_init[i]=NULL;return1;}__setup("init=",init_setup);staticint__initrdinit_setup(char*str){unsignedinti;ramdisk_execute_command=str;/*See"auto"commentininit_setup*/for(i=1;i<MAX_INIT_ARGS;i++)argv_init[i]=NULL;return1;}__setup("rdinit=",rdinit_setup);#ifndefCONFIG_SMPstaticconstunsignedintsetup_max_cpus=NR_CPUS;staticinlinevoidsetup_nr_cpu_ids(void){}staticinlinevoidsmp_prepare_cpus(unsignedintmaxcpus){}#endif/**Weneedtostoretheuntouchedcommandlineforfuturereference.*Wealsoneedtostorethetouchedcommandlinesincetheparameter*parsingisperformedinplace,andweshouldallowacomponentto*storereferenceofname/valueforfuturereference.*/staticvoid__initsetup_command_line(char*command_line){saved_command_line=memblock_virt_alloc(strlen(boot_command_line)+1,0);initcall_command_line=memblock_virt_alloc(strlen(boot_command_line)+1,0);static_command_line=memblock_virt_alloc(strlen(command_line)+1,0);strcpy(saved_command_line,boot_command_line);strcpy(static_command_line,command_line);}/**Weneedtofinalizeinanon-__initfunctionorelseraceconditions*betweentherootthreadandtheinitthreadmaycausestart_kernelto*bereapedbyfree_initmembeforetherootthreadhasproceededto*cpu_idle.**gcc-3.4accidentallyinlinesthisfunction,sousenoinline.*/static__initdataDECLARE_COMPLETION(kthreadd_done);staticnoinlinevoid__refrest_init(void){structtask_struct*tsk;intpid;rcu_scheduler_starting();/**Weneedtospawninitfirstsothatitobtainspid1,however*theinittaskwillendupwantingtocreatekthreads,which,if*wescheduleitbeforewecreatekthreadd,willOOPS.*/pid=kernel_thread(kernel_init,NULL,CLONE_FS);/**PininitonthebootCPU.Taskmigrationisnotproperlyworking*untilsched_init_smp()hasbeenrun.Itwillsettheallowed*CPUsforinittothenonisolatedCPUs.*/rcu_read_lock();tsk=find_task_by_pid_ns(pid,&init_pid_ns);set_cpus_allowed_ptr(tsk,cpumask_of(smp_processor_id()));rcu_read_unlock();numa_default_policy();pid=kernel_thread(kthreadd,NULL,CLONE_FS|CLONE_FILES);rcu_read_lock();kthreadd_task=find_task_by_pid_ns(pid,&init_pid_ns);rcu_read_unlock();/**Enablemight_sleep()andsmp_processor_id()checks.*TheycannotbeenabledearlierbecausewithCONFIG_PRREMPT=y*kernel_thread()wouldtriggermight_sleep()splats.With*CONFIG_PREEMPT_VOLUNTARY=ytheinittaskmighthavescheduled*already,butit'sstuckonthekthreadd_donecompletion.*/system_state=SYSTEM_SCHEDULING;complete(&kthreadd_done);/**Thebootidlethreadmustexecuteschedule()*atleastoncetogetthingsmoving:*/init_idle_bootup_task(current);schedule_preempt_disabled();/*Callintocpu_idlewithpreemptdisabled*/cpu_startup_entry(CPUHP_ONLINE);}/*Checkforearlyparams.*/staticint__initdo_early_param(char*param,char*val,constchar*unused,void*arg){conststructobs_kernel_param*p;for(p=__setup_start;p<__setup_end;p++){if((p->early&¶meq(param,p->str))||(strcmp(param,"console")==0&&strcmp(p->str,"earlycon")==0)){if(p->setup_func(val)!=0)pr_warn("Malformedearlyoption'%s'\n",param);}}/*Weaccepteverythingatthisstage.*/return0;}void__initparse_early_options(char*cmdline){parse_args("earlyoptions",cmdline,NULL,0,0,0,NULL,do_early_param);}/*Archcodecallsthisearlyon,orifnot,justbeforeotherparsing.*/void__initparse_early_param(void){staticintdone__initdata;staticchartmp_cmdline[COMMAND_LINE_SIZE]__initdata;if(done)return;/*Allfallthroughtodo_early_param.*/strlcpy(tmp_cmdline,boot_command_line,COMMAND_LINE_SIZE);parse_early_options(tmp_cmdline);done=1;}void__init__weakarch_post_acpi_subsys_init(void){}void__init__weaksmp_setup_processor_id(void){}#ifTHREAD_SIZE>=PAGE_SIZEvoid__init__weakthread_stack_cache_init(void){}#endif/**Setupkernelmemoryallocators*/staticvoid__initmm_init(void){/**page_extrequirescontiguouspages,*biggerthanMAX_ORDERunlessSPARSEMEM.*/page_ext_init_flatmem();mem_init();kmem_cache_init();percpu_init_late();pgtable_init();vmalloc_init();ioremap_huge_init();}asmlinkage__visiblevoid__initstart_kernel(void){char*command_line;char*after_dashes;set_task_stack_end_magic(&init_task);smp_setup_processor_id();debug_objects_early_init();/**SetuptheinitialcanaryASAP:*/add_latent_entropy();boot_init_stack_canary();cgroup_init_early();local_irq_disable();early_boot_irqs_disabled=true;/**Interruptsarestilldisabled.Donecessarysetups,then*enablethem.*/boot_cpu_init();page_address_init();pr_notice("%s",linux_banner);setup_arch(&command_line);mm_init_cpumask(&init_mm);setup_command_line(command_line);setup_nr_cpu_ids();setup_per_cpu_areas();boot_cpu_state_init();smp_prepare_boot_cpu();/*arch-specificboot-cpuhooks*/build_all_zonelists(NULL,NULL);page_alloc_init();pr_notice("Kernelcommandline:%s\n",boot_command_line);parse_early_param();after_dashes=parse_args("Bootingkernel",static_command_line,__start___param,__stop___param-__start___param,-1,-1,NULL,&unknown_bootoption);if(!IS_ERR_OR_NULL(after_dashes))parse_args("Settinginitargs",after_dashes,NULL,0,-1,-1,NULL,set_init_arg);jump_label_init();/**Theseuselargebootmemallocationsandmustprecede*kmem_cache_init()*/setup_log_buf(0);pidhash_init();vfs_caches_init_early();sort_main_extable();trap_init();mm_init();ftrace_init();/*trace_printkcanbeenabledhere*/early_trace_init();/**Setuptheschedulerpriorstartinganyinterrupts(suchasthe*timerinterrupt).Fulltopologysetuphappensatsmp_init()*time-butmeanwhilewestillhaveafunctioningscheduler.*/sched_init();/**Disablepreemption-earlybootupschedulingisextremely*fragileuntilwecpu_idle()forthefirsttime.*/preempt_disable();if(WARN(!irqs_disabled(),"Interruptswereenabled*very*early,fixingit\n"))local_irq_disable();radix_tree_init();/**Allowworkqueuecreationandworkitemqueueing/cancelling*early.Workitemexecutiondependsonkthreadsandstartsafter*workqueue_init().*/workqueue_init_early();rcu_init();/*Traceeventsareavailableafterthis*/trace_init();context_tracking_init();/*initsomelinksbeforeinit_ISA_irqs()*/early_irq_init();init_IRQ();tick_init();rcu_init_nohz();init_timers();hrtimers_init();softirq_init();timekeeping_init();time_init();sched_clock_postinit();printk_safe_init();perf_event_init();profile_init();call_function_init();WARN(!irqs_disabled(),"Interruptswereenabledearly\n");early_boot_irqs_disabled=false;local_irq_enable();kmem_cache_init_late();/**HACKALERT!Thisisearly.We'reenablingtheconsolebefore*we'vedonePCIsetupsetc,andconsole_init()mustbeawareof*this.Butwedowantoutputearly,incasesomethinggoeswrong.*/console_init();if(panic_later)panic("Toomanyboot%svarsat`%s'",panic_later,panic_param);lockdep_info();/**Needtorunthiswhenirqsareenabled,becauseitwants*toself-test[hard/soft]-irqson/offlockinversionbugs*too:*/locking_selftest();#ifdefCONFIG_BLK_DEV_INITRDif(initrd_start&&!initrd_below_start_ok&&page_to_pfn(virt_to_page((void*)initrd_start))<min_low_pfn){pr_crit("initrdoverwritten(0x%08lx<0x%08lx)-disablingit.\n",page_to_pfn(virt_to_page((void*)initrd_start)),min_low_pfn);initrd_start=0;}#endifpage_ext_init();debug_objects_mem_init();kmemleak_init();setup_per_cpu_pageset();numa_policy_init();if(late_time_init)late_time_init();calibrate_delay();pidmap_init();anon_vma_init();acpi_early_init();#ifdefCONFIG_X86if(efi_enabled(EFI_RUNTIME_SERVICES))efi_enter_virtual_mode();#endif#ifdefCONFIG_X86_ESPFIX64/*Shouldberunbeforethefirstnon-initthreadiscreated*/init_espfix_bsp();#endifthread_stack_cache_init();cred_init();fork_init();proc_caches_init();buffer_init();key_init();security_init();dbg_late_init();vfs_caches_init();pagecache_init();signals_init();proc_root_init();nsfs_init();cpuset_init();cgroup_init();taskstats_init_early();delayacct_init();check_bugs();acpi_subsystem_init();arch_post_acpi_subsys_init();sfi_init_late();if(efi_enabled(EFI_RUNTIME_SERVICES)){efi_free_boot_services();}/*Dotherestnon-__init'ed,we'renowalive*/rest_init();}/*Callallconstructorfunctionslinkedintothekernel.*/staticvoid__initdo_ctors(void){#ifdefCONFIG_CONSTRUCTORSctor_fn_t*fn=(ctor_fn_t*)__ctors_start;for(;fn<(ctor_fn_t*)__ctors_end;fn++)(*fn)();#endif}boolinitcall_debug;core_param(initcall_debug,initcall_debug,bool,0644);#ifdefCONFIG_KALLSYMSstructblacklist_entry{structlist_headnext;char*buf;};static__initdata_or_moduleLIST_HEAD(blacklisted_initcalls);staticint__initinitcall_blacklist(char*str){char*str_entry;structblacklist_entry*entry;/*strargumentisacomma-separatedlistoffunctions*/do{str_entry=strsep(&str,",");if(str_entry){pr_debug("blacklistinginitcall%s\n",str_entry);entry=alloc_bootmem(sizeof(*entry));entry->buf=alloc_bootmem(strlen(str_entry)+1);strcpy(entry->buf,str_entry);list_add(&entry->next,&blacklisted_initcalls);}}while(str_entry);return0;}staticbool__init_or_moduleinitcall_blacklisted(initcall_tfn){structblacklist_entry*entry;charfn_name[KSYM_SYMBOL_LEN];unsignedlongaddr;if(list_empty(&blacklisted_initcalls))returnfalse;addr=(unsignedlong)dereference_function_descriptor(fn);sprint_symbol_no_offset(fn_name,addr);/**fnwillbe"function_name[module_name]"where[module_name]isnot*displayedforbuilt-ininitfunctions.Stripoffthe[module_name].*/strreplace(fn_name,'','\0');list_for_each_entry(entry,&blacklisted_initcalls,next){if(!strcmp(fn_name,entry->buf)){pr_debug("initcall%sblacklisted\n",fn_name);returntrue;}}returnfalse;}#elsestaticint__initinitcall_blacklist(char*str){pr_warn("initcall_blacklistrequiresCONFIG_KALLSYMS\n");return0;}staticbool__init_or_moduleinitcall_blacklisted(initcall_tfn){returnfalse;}#endif__setup("initcall_blacklist=",initcall_blacklist);staticint__init_or_moduledo_one_initcall_debug(initcall_tfn){ktime_tcalltime,delta,rettime;unsignedlonglongduration;intret;printk(KERN_DEBUG"calling%pF@%i\n",fn,task_pid_nr(current));calltime=ktime_get();ret=fn();rettime=ktime_get();delta=ktime_sub(rettime,calltime);duration=(unsignedlonglong)ktime_to_ns(delta)>>10;printk(KERN_DEBUG"initcall%pFreturned%dafter%lldusecs\n",fn,ret,duration);returnret;}int__init_or_moduledo_one_initcall(initcall_tfn){intcount=preempt_count();intret;charmsgbuf[64];if(initcall_blacklisted(fn))return-EPERM;if(initcall_debug)ret=do_one_initcall_debug(fn);elseret=fn();msgbuf[0]=0;if(preempt_count()!=count){sprintf(msgbuf,"preemptionimbalance");preempt_count_set(count);}if(irqs_disabled()){strlcat(msgbuf,"disabledinterrupts",sizeof(msgbuf));local_irq_enable();}WARN(msgbuf[0],"initcall%pFreturnedwith%s\n",fn,msgbuf);add_latent_entropy();returnret;}externinitcall_t__initcall_start[];externinitcall_t__initcall0_start[];externinitcall_t__initcall1_start[];externinitcall_t__initcall2_start[];externinitcall_t__initcall3_start[];externinitcall_t__initcall4_start[];externinitcall_t__initcall5_start[];externinitcall_t__initcall6_start[];externinitcall_t__initcall7_start[];externinitcall_t__initcall_end[];staticinitcall_t*initcall_levels[]__initdata={__initcall0_start,__initcall1_start,__initcall2_start,__initcall3_start,__initcall4_start,__initcall5_start,__initcall6_start,__initcall7_start,__initcall_end,};/*Keeptheseinsyncwithinitcallsininclude/linux/init.h*/staticchar*initcall_level_names[]__initdata={"early","core","postcore","arch","subsys","fs","device","late",};staticvoid__initdo_initcall_level(intlevel){initcall_t*fn;strcpy(initcall_command_line,saved_command_line);parse_args(initcall_level_names[level],initcall_command_line,__start___param,__stop___param-__start___param,level,level,NULL,&repair_env_string);for(fn=initcall_levels[level];fn<initcall_levels[level+1];fn++)do_one_initcall(*fn);}staticvoid__initdo_initcalls(void){intlevel;for(level=0;level<ARRAY_SIZE(initcall_levels)-1;level++)do_initcall_level(level);}/**Ok,themachineisnowinitialized.Noneofthedevices*havebeentouchedyet,buttheCPUsubsystemisupand*running,andmemoryandprocessmanagementworks.**Nowwecanfinallystartdoingsomerealwork..*/staticvoid__initdo_basic_setup(void){cpuset_init_smp();shmem_init();driver_init();init_irq_proc();do_ctors();usermodehelper_enable();do_initcalls();}staticvoid__initdo_pre_smp_initcalls(void){initcall_t*fn;for(fn=__initcall_start;fn<__initcall0_start;fn++)do_one_initcall(*fn);}/**Thisfunctionrequestsmoduleswhichshouldbeloadedbydefaultandis*calledtwicerightafterinitrdismountedandrightbeforeinitis*exec'd.Ifsuchmodulesareoneitherinitrdorrootfs,theywillbe*loadedbeforecontrolispassedtouserland.*/void__initload_default_modules(void){load_default_elevator_module();}staticintrun_init_process(constchar*init_filename){argv_init[0]=init_filename;returndo_execve(getname_kernel(init_filename),(constchar__user*const__user*)argv_init,(constchar__user*const__user*)envp_init);}staticinttry_to_run_init_process(constchar*init_filename){intret;ret=run_init_process(init_filename);if(ret&&ret!=-ENOENT){pr_err("Startinginit:%sexistsbutcouldn'texecuteit(error%d)\n",init_filename,ret);}returnret;}staticnoinlinevoid__initkernel_init_freeable(void);#ifdefined(CONFIG_STRICT_KERNEL_RWX)||defined(CONFIG_STRICT_MODULE_RWX)boolrodata_enabled__ro_after_init=true;staticint__initset_debug_rodata(char*str){returnstrtobool(str,&rodata_enabled);}__setup("rodata=",set_debug_rodata);#endif#ifdefCONFIG_STRICT_KERNEL_RWXstaticvoidmark_readonly(void){if(rodata_enabled){mark_rodata_ro();rodata_test();}elsepr_info("Kernelmemoryprotectiondisabled.\n");}#elsestaticinlinevoidmark_readonly(void){pr_warn("Thisarchitecturedoesnothavekernelmemoryprotection.\n");}#endifstaticint__refkernel_init(void*unused){intret;kernel_init_freeable();/*needtofinishallasync__initcodebeforefreeingthememory*/async_synchronize_full();ftrace_free_init_mem();free_initmem();mark_readonly();system_state=SYSTEM_RUNNING;numa_default_policy();rcu_end_inkernel_boot();if(ramdisk_execute_command){ret=run_init_process(ramdisk_execute_command);if(!ret)return0;pr_err("Failedtoexecute%s(error%d)\n",ramdisk_execute_command,ret);}/**Wetryeachoftheseuntilonesucceeds.**TheBourneshellcanbeusedinsteadofinitifweare*tryingtorecoverareallybrokenmachine.*/if(execute_command){ret=run_init_process(execute_command);if(!ret)return0;panic("Requestedinit%sfailed(error%d).",execute_command,ret);}if(!try_to_run_init_process("/sbin/init")||!try_to_run_init_process("/etc/init")||!try_to_run_init_process("/bin/init")||!try_to_run_init_process("/bin/sh"))return0;panic("Noworkinginitfound.Trypassinginit=optiontokernel.""SeeLinuxDocumentation/admin-guide/init.rstforguidance.");}staticnoinlinevoid__initkernel_init_freeable(void){/**Waituntilkthreaddisallset-up.*/wait_for_completion(&kthreadd_done);/*Nowtheschedulerisfullysetupandcandoblockingallocations*/gfp_allowed_mask=__GFP_BITS_MASK;/**initcanallocatepagesonanynode*/set_mems_allowed(node_states[N_MEMORY]);cad_pid=task_pid(current);smp_prepare_cpus(setup_max_cpus);workqueue_init();init_mm_internals();do_pre_smp_initcalls();lockup_detector_init();smp_init();sched_init_smp();page_alloc_init_late();do_basic_setup();/*Openthe/dev/consoleontherootfs,thisshouldneverfail*/if(sys_open((constchar__user*)"/dev/console",O_RDWR,0)<0)pr_err("Warning:unabletoopenaninitialconsole.\n");(void)sys_dup(0);(void)sys_dup(0);/**checkifthereisanearlyuserspaceinit.Ifyes,letitdoall*thework*/if(!ramdisk_execute_command)ramdisk_execute_command="/init";if(sys_access((constchar__user*)ramdisk_execute_command,0)!=0){ramdisk_execute_command=NULL;prepare_namespace();}/**Ok,wehavecompletedtheinitialbootup,and*we'reessentiallyupandrunning.Getridofthe*initmemsegmentsandstarttheuser-modestuff..**rootfsisavailablenow,tryloadingthepublickeys*anddefaultmodules*/integrity_load_keys();load_default_modules();} 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Indeed, very fast for computers, but not for humans. |
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@Vetpetmon Someone comments on a PR I left a satirical comment on 7.29 years ago, and it's the ATer whom I (who changed my username from Jonathan50) quarreled with about Linux vs. Windows and stuff on TIMaC almost 9 years ago? 0_o (sorry about that BTW, it's funny now) |
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Can you resolve the conflict, please? |
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waiting for the pr to be merged |
remove empty characters