Changes in reboot.c

59376fb2 - um: Remove unused mm_fd field from mm_id

Mon, 26 Aug 2024 10:08:12 +0000

um: Remove unused mm_fd field from mm_idIt's no longer used since the removal of the SKAS3/4 support.Signed-off-by: Tiwei Bie Signed-off-by: Richard Weinberger List of files: /linux-6.15/arch/um/kernel/reboot.c

86abcd6e - um: register power-off handler

Wed, 03 Jul 2024 15:38:40 +0000

um: register power-off handlerOtherwise we always get reboot: Power off not available: System halted insteadwhich is really quite pointless.Link: https://patch.msgid.link/20240703173839.fcbb538c6686.I3d333f4773cff93c4337c4d128ee0b1b501b3dfa@changeidAcked-By: Anton Ivanov Signed-off-by: Johannes Berg List of files: /linux-6.15/arch/um/kernel/reboot.c

9ffc6724 - um: Add missing headers

Wed, 06 Mar 2024 10:19:21 +0000

um: Add missing headersThis will address below -Wmissing-prototypes warnings:arch/um/kernel/mem.c:202:8: warning: no previous prototype for ‘pgd_alloc’ [-Wmissing-prototypes]arch/um/kernel/mem.c:215:7: warning: no previous prototype for ‘uml_kmalloc’ [-Wmissing-prototypes]arch/um/kernel/process.c:207:6: warning: no previous prototype for ‘arch_cpu_idle’ [-Wmissing-prototypes]arch/um/kernel/process.c:328:15: warning: no previous prototype for ‘arch_align_stack’ [-Wmissing-prototypes]arch/um/kernel/reboot.c:45:6: warning: no previous prototype for ‘machine_restart’ [-Wmissing-prototypes]arch/um/kernel/reboot.c:51:6: warning: no previous prototype for ‘machine_power_off’ [-Wmissing-prototypes]arch/um/kernel/reboot.c:57:6: warning: no previous prototype for ‘machine_halt’ [-Wmissing-prototypes]arch/um/kernel/skas/mmu.c:17:5: warning: no previous prototype for ‘init_new_context’ [-Wmissing-prototypes]arch/um/kernel/skas/mmu.c:60:6: warning: no previous prototype for ‘destroy_context’ [-Wmissing-prototypes]arch/um/kernel/skas/process.c:36:12: warning: no previous prototype for ‘start_uml’ [-Wmissing-prototypes]arch/um/kernel/time.c:807:15: warning: no previous prototype for ‘calibrate_delay_is_known’ [-Wmissing-prototypes]arch/um/kernel/tlb.c:594:6: warning: no previous prototype for ‘force_flush_all’ [-Wmissing-prototypes]arch/x86/um/bugs_32.c:22:6: warning: no previous prototype for ‘arch_check_bugs’ [-Wmissing-prototypes]arch/x86/um/bugs_32.c:44:6: warning: no previous prototype for ‘arch_examine_signal’ [-Wmissing-prototypes]arch/x86/um/bugs_64.c:9:6: warning: no previous prototype for ‘arch_check_bugs’ [-Wmissing-prototypes]arch/x86/um/bugs_64.c:13:6: warning: no previous prototype for ‘arch_examine_signal’ [-Wmissing-prototypes]arch/x86/um/elfcore.c:10:12: warning: no previous prototype for ‘elf_core_extra_phdrs’ [-Wmissing-prototypes]arch/x86/um/elfcore.c:15:5: warning: no previous prototype for ‘elf_core_write_extra_phdrs’ [-Wmissing-prototypes]arch/x86/um/elfcore.c:42:5: warning: no previous prototype for ‘elf_core_write_extra_data’ [-Wmissing-prototypes]arch/x86/um/elfcore.c:63:8: warning: no previous prototype for ‘elf_core_extra_data_size’ [-Wmissing-prototypes]arch/x86/um/fault.c:18:5: warning: no previous prototype for ‘arch_fixup’ [-Wmissing-prototypes]arch/x86/um/os-Linux/mcontext.c:7:6: warning: no previous prototype for ‘get_regs_from_mc’ [-Wmissing-prototypes]arch/x86/um/os-Linux/tls.c:22:6: warning: no previous prototype for ‘check_host_supports_tls’ [-Wmissing-prototypes]Signed-off-by: Tiwei Bie Signed-off-by: Richard Weinberger List of files: /linux-6.15/arch/um/kernel/reboot.c

0d1fb0a4 - um: Add SPDX headers to files in arch/um/kernel/

Sun, 25 Aug 2019 09:49:17 +0000

um: Add SPDX headers to files in arch/um/kernel/Convert files to use SPDX header. All files are licensed under theGPLv2.Signed-off-by: Alex Dewar Signed-off-by: Richard Weinberger List of files: /linux-6.15/arch/um/kernel/reboot.c

589ee628 - sched/headers: Prepare to remove the dependency from

Fri, 03 Feb 2017 23:16:44 +0000

sched/headers: Prepare to remove the dependency from Update code that relied on sched.h including various MM types for them.This will allow us to remove the include from .Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.orgSigned-off-by: Ingo Molnar List of files: /linux-6.15/arch/um/kernel/reboot.c

29930025 - sched/headers: Prepare for new header dependencies before moving code to

Wed, 08 Feb 2017 17:51:36 +0000

sched/headers: Prepare for new header dependencies before moving code to We are going to split out of , whichwill have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that justmaps to to make this patch obviously correct andbisectable.Include the new header in the files that are going to need it.Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.orgSigned-off-by: Ingo Molnar List of files: /linux-6.15/arch/um/kernel/reboot.c

3f07c014 - sched/headers: Prepare for new header dependencies before moving code to

Wed, 08 Feb 2017 17:51:30 +0000

0834f9cc - um: Export pm_power_off

Mon, 25 Jan 2016 22:24:21 +0000

um: Export pm_power_off...modules are using this symbol.Export it like all other archs to.Signed-off-by: Richard Weinberger List of files: /linux-6.15/arch/um/kernel/reboot.c

d0b5e15f - um: Remove SKAS3/4 support

Wed, 18 Mar 2015 20:31:27 +0000

um: Remove SKAS3/4 supportBefore we had SKAS0 UML had two modes of operationTT (tracing thread) and SKAS3/4 (separated kernel address space).TT was known to be insecure and got removed a long time ago.SKAS3/4 required a few (3 or 4) patches on the host side which never wentmainline. The last host patch is 10 years old.With SKAS0 mode (separated kernel address space using 0 host patches),default since 2005, SKAS3/4 is obsolete and can be removed.Signed-off-by: Richard Weinberger List of files: /linux-6.15/arch/um/kernel/reboot.c

37185b33 - um: get rid of pointless include "..." where include <...> will do

Mon, 08 Oct 2012 02:27:32 +0000

um: get rid of pointless include "..." where include <...> will doSigned-off-by: Al Viro Signed-off-by: Richard Weinberger List of files: /linux-6.15/arch/um/kernel/reboot.c

2c922c51 - um: properly check all process' threads for a live mm

Thu, 31 May 2012 23:26:26 +0000

um: properly check all process' threads for a live mmkill_off_processes() might miss a valid process, this is because checkingfor process->mm is not enough. Process' main thread may exit or detachits mm via use_mm(), but other threads may still have a valid mm.To catch this we use find_lock_task_mm(), which walks up all threads andreturns an appropriate task (with task lock held).Suggested-by: Oleg Nesterov Signed-off-by: Anton Vorontsov Cc: Richard Weinberger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

137d1a26 - um: fix possible race on task->mm

Thu, 31 May 2012 23:26:25 +0000

um: fix possible race on task->mmChecking for task->mm is dangerous as ->mm might disappear (exit_mm()assigns NULL under task_lock(), so tasklist lock is not enough).We can't use get_task_mm()/mmput() pair as mmput() might sleep, so let'stake the task lock while we care about its mm.Note that we should also use find_lock_task_mm() to check all process'threads for a valid mm, but for uml we'll do it in a separate patch.Signed-off-by: Anton Vorontsov Cc: Richard Weinberger Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

9bd0a077 - um: should hold tasklist_lock while traversing processes

Thu, 31 May 2012 23:26:25 +0000

um: should hold tasklist_lock while traversing processesTraversing the tasks requires holding tasklist_lock, otherwise it isunsafe.p.s. However, I'm not sure that calling os_kill_ptraced_process() in theatomic context is correct. It seem to work, but please take a closerlook.Signed-off-by: Anton Vorontsov Cc: Richard Weinberger Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

f1c93e49 - um: remove dead code

Tue, 26 Jul 2011 00:12:55 +0000

um: remove dead codeGCC 4.6's -Wunused-but-set-variable found some dead code.Signed-off-by: Richard Weinberger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

5a0e3ad6 - include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

Wed, 24 Mar 2010 08:04:11 +0000

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.hpercpu.h is included by sched.h and module.h and thus ends up beingincluded when building most .c files. percpu.h includes slab.h whichin turn includes gfp.h making everything defined by the two filesuniversally available and complicating inclusion dependencies.percpu.h -> slab.h dependency is about to be removed. Prepare forthis change by updating users of gfp and slab facilities include thoseheaders directly instead of assuming availability. As this conversionneeds to touch large number of source files, the following script isused as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.pyThe script does the followings.* Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h.* When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order.* If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file.The conversion was done in the following steps.1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files.2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files.3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind.4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually.5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary.6. percpu.h was updated not to include slab.h.7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point.Given the fact that I had only a couple of failures from tests on step6, I'm fairly confident about the coverage of this conversion patch.If there is a breakage, it's likely to be something in one of the archheaders which should be easily discoverable easily on most builds ofthe specific arch.Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn List of files: /linux-6.15/arch/um/kernel/reboot.c

c5d4bb17 - uml: style fixes in arch/um/kernel

Tue, 05 Feb 2008 06:31:14 +0000

uml: style fixes in arch/um/kernelJoe Perches noticed some printks in smp.c that needed fixing.While I was in there, I did the usual tidying in arch/um/kernel, whichshould be fairly style-clean at this point: copyright updates emacs formatting comments removal include tidying style fixesCc: Joe Perches Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

edea1385 - uml: tidy kern_util.h

Tue, 05 Feb 2008 06:30:46 +0000

uml: tidy kern_util.hTidy kern_util.h. It turns out that most of the function declarationsaren't used, so they can go away. os.h no longer includeskern_util.h, so files which got it through os.h now need to include itdirectly. A number of other files never needed it, so these includesare deleted.The structure which was used to pass signal handlers from the kernelside to the userspace side is gone. Instead, the handlers aredeclared here, and used directly from libc code. This allowsarch/um/os-Linux/trap.c to be deleted, with its remnants being movedto arch/um/os-Linux/skas/trap.c.arch/um/os-Linux/tty.c had its inclusions changed, and it needed somestyle attention, so it got tidied.Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

6c738ffa - uml: fold mmu_context_skas into mm_context

Tue, 16 Oct 2007 08:27:06 +0000

uml: fold mmu_context_skas into mm_contextThis patch folds mmu_context_skas into struct mm_context, changing all usersof these structures as needed.Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

ba180fd4 - uml: style fixes pass 3

Tue, 16 Oct 2007 08:27:00 +0000

uml: style fixes pass 3Formatting changes in the files which have been changed in the courseof folding foo_skas functions into their callers. These include: copyright updates header file trimming style fixes adding severity to printksThese changes should be entirely non-functional.Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c

77bf4400 - uml: remove code made redundant by CHOOSE_MODE removal

Tue, 16 Oct 2007 08:26:58 +0000

uml: remove code made redundant by CHOOSE_MODE removalThis patch makes a number of simplifications enabled by the removal ofCHOOSE_MODE. There were lots of functions that looked like int foo(args){ foo_skas(args); }The bodies of foo_skas are now folded into foo, and their declarations (andsometimes entire header files) are deleted.In addition, the union uml_pt_regs, which was a union between the tt and skasregister formats, is now a struct, with the tt-mode arm of the union beingremoved.It turns out that usr2_handler was unused, so it is gone.Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/um/kernel/reboot.c