Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of...

Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - An extensive rework of kexec and crash Kconfig from Eric DeVolder
   ("refactor Kconfig to consolidate KEXEC and CRASH options")

 - kernel.h slimming work from Andy Shevchenko ("kernel.h: Split out a
   couple of macros to args.h")

 - gdb feature work from Kuan-Ying Lee ("Add GDB memory helper
   commands")

 - vsprintf inclusion rationalization from Andy Shevchenko
   ("lib/vsprintf: Rework header inclusions")

 - Switch the handling of kdump from a udev scheme to in-kernel
   handling, by Eric DeVolder ("crash: Kernel handling of CPU and memory
   hot un/plug")

 - Many singleton patches to various parts of the tree

* tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (81 commits)
  document while_each_thread(), change first_tid() to use for_each_thread()
  drivers/char/mem.c: shrink character device's devlist[] array
  x86/crash: optimize CPU changes
  crash: change crash_prepare_elf64_headers() to for_each_possible_cpu()
  crash: hotplug support for kexec_load()
  x86/crash: add x86 crash hotplug support
  crash: memory and CPU hotplug sysfs attributes
  kexec: exclude elfcorehdr from the segment digest
  crash: add generic infrastructure for crash hotplug support
  crash: move a few code bits to setup support of crash hotplug
  kstrtox: consistently use _tolower()
  kill do_each_thread()
  nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse
  scripts/bloat-o-meter: count weak symbol sizes
  treewide: drop CONFIG_EMBEDDED
  lockdep: fix static memory detection even more
  lib/vsprintf: declare no_hash_pointers in sprintf.h
  lib/vsprintf: split out sprintf() and friends
  kernel/fork: stop playing lockless games for exe_file replacement
  adfs: delete unused "union adfs_dirtail" definition
  ...

Documentation/ABI/testing/sysfs-devices-memory

@@ -110,3 +110,11 @@ Description:
 		link is created for memory section 9 on node0.
 
 		/sys/devices/system/node/node0/memory9 -> ../../memory/memory9
+
+What:		/sys/devices/system/memory/crash_hotplug
+Date:		Aug 2023
+Contact:	Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:
+		(RO) indicates whether or not the kernel directly supports
+		modifying the crash elfcorehdr for memory hot un/plug and/or
+		on/offline changes.

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -688,3 +688,11 @@ Description:
 		(RO) the list of CPUs that are isolated and don't
 		participate in load balancing. These CPUs are set by
 		boot parameter "isolcpus=".
+
+What:		/sys/devices/system/cpu/crash_hotplug
+Date:		Aug 2023
+Contact:	Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:
+		(RO) indicates whether or not the kernel directly supports
+		modifying the crash elfcorehdr for CPU hot un/plug and/or
+		on/offline changes.

Documentation/admin-guide/mm/memory-hotplug.rst

@@ -291,6 +291,14 @@ The following files are currently defined:
 		       Availability depends on the CONFIG_ARCH_MEMORY_PROBE
 		       kernel configuration option.
 ``uevent``	       read-write: generic udev file for device subsystems.
+``crash_hotplug``      read-only: when changes to the system memory map
+		       occur due to hot un/plug of memory, this file contains
+		       '1' if the kernel updates the kdump capture kernel memory
+		       map itself (via elfcorehdr), or '0' if userspace must update
+		       the kdump capture kernel memory map.
+
+		       Availability depends on the CONFIG_MEMORY_HOTPLUG kernel
+		       configuration option.
 ====================== =========================================================
 
 .. note::

Documentation/core-api/cpu_hotplug.rst

@@ -741,6 +741,24 @@ will receive all events. A script like::
 
 can process the event further.
 
+When changes to the CPUs in the system occur, the sysfs file
+/sys/devices/system/cpu/crash_hotplug contains '1' if the kernel
+updates the kdump capture kernel list of CPUs itself (via elfcorehdr),
+or '0' if userspace must update the kdump capture kernel list of CPUs.
+
+The availability depends on the CONFIG_HOTPLUG_CPU kernel configuration
+option.
+
+To skip userspace processing of CPU hot un/plug events for kdump
+(i.e. the unload-then-reload to obtain a current list of CPUs), this sysfs
+file can be used in a udev rule as follows:
+
+ SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
+
+For a CPU hot un/plug event, if the architecture supports kernel updates
+of the elfcorehdr (which contains the list of CPUs), then the rule skips
+the unload-then-reload of the kdump capture kernel.
+
 Kernel Inline Documentations Reference
 ======================================
 

arch/Kconfig

@@ -11,19 +11,6 @@ source "arch/$(SRCARCH)/Kconfig"
 
 menu "General architecture-dependent options"
 
-config CRASH_CORE
-	bool
-
-config KEXEC_CORE
-	select CRASH_CORE
-	bool
-
-config KEXEC_ELF
-	bool
-
-config HAVE_IMA_KEXEC
-	bool
-
 config ARCH_HAS_SUBPAGE_FAULTS
 	bool
 	help
@@ -748,7 +735,9 @@ config HAS_LTO_CLANG
 	depends on $(success,$(AR) --help | head -n 1 | grep -qi llvm)
 	depends on ARCH_SUPPORTS_LTO_CLANG
 	depends on !FTRACE_MCOUNT_USE_RECORDMCOUNT
-	depends on !KASAN || KASAN_HW_TAGS
+	# https://github.com/ClangBuiltLinux/linux/issues/1721
+	depends on (!KASAN || KASAN_HW_TAGS || CLANG_VERSION >= 170000) || !DEBUG_INFO
+	depends on (!KCOV || CLANG_VERSION >= 170000) || !DEBUG_INFO
 	depends on !GCOV_KERNEL
 	help
 	  The compiler and Kconfig options support building with Clang's

arch/arc/configs/axs101_defconfig

@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_UTS_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set

arch/arc/configs/axs103_defconfig

@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_UTS_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set

arch/arc/configs/axs103_smp_defconfig

@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_UTS_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set

arch/arc/configs/haps_hs_smp_defconfig

@@ -11,7 +11,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_UTS_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set

arch/arc/configs/hsdk_defconfig

@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_BLK_DEV_RAM=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set

arch/arc/configs/nsim_700_defconfig

@@ -12,7 +12,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/arc/configs/nsimosci_defconfig

@@ -11,7 +11,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/arc/configs/nsimosci_hs_defconfig

@@ -11,7 +11,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/arc/configs/tb10x_defconfig

@@ -16,7 +16,7 @@ CONFIG_INITRAMFS_ROOT_GID=501
 # CONFIG_RD_GZIP is not set
 CONFIG_KALLSYMS_ALL=y
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_ISA_ARCOMPACT=y
 CONFIG_MODULES=y

arch/arc/configs/vdk_hs38_defconfig

@@ -4,7 +4,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set

arch/arc/configs/vdk_hs38_smp_defconfig

@@ -4,7 +4,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set

arch/arm/Kconfig

@@ -250,7 +250,7 @@ config ARCH_MTD_XIP
 	bool
 
 config ARM_PATCH_PHYS_VIRT
-	bool "Patch physical to virtual translations at runtime" if EMBEDDED
+	bool "Patch physical to virtual translations at runtime" if !ARCH_MULTIPLATFORM
 	default y
 	depends on MMU
 	help
@@ -1645,20 +1645,8 @@ config XIP_DEFLATED_DATA
 	  copied, saving some precious ROM space. A possible drawback is a
 	  slightly longer boot delay.
 
-config KEXEC
-	bool "Kexec system call (EXPERIMENTAL)"
-	depends on (!SMP || PM_SLEEP_SMP)
-	depends on MMU
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  is properly shutdown, so do not be surprised if this code does not
-	  initially work for you.
+config ARCH_SUPPORTS_KEXEC
+	def_bool (!SMP || PM_SLEEP_SMP) && MMU
 
 config ATAGS_PROC
 	bool "Export atags in procfs"
@@ -1668,17 +1656,8 @@ config ATAGS_PROC
 	  Should the atags used to boot the kernel be exported in an "atags"
 	  file in procfs. Useful with kexec.
 
-config CRASH_DUMP
-	bool "Build kdump crash kernel (EXPERIMENTAL)"
-	help
-	  Generate crash dump after being started by kexec. This should
-	  be normally only set in special crash dump kernels which are
-	  loaded in the main kernel with kexec-tools into a specially
-	  reserved region and then later executed after a crash by
-	  kdump/kexec. The crash dump kernel must be compiled to a
-	  memory address not used by the main kernel
-
-	  For more details see Documentation/admin-guide/kdump/kdump.rst
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool y
 
 config AUTO_ZRELADDR
 	bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM

arch/arm/configs/aspeed_g4_defconfig

@@ -15,7 +15,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_UID16 is not set
 # CONFIG_SYSFS_SYSCALL is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_ASPEED=y

arch/arm/configs/aspeed_g5_defconfig

@@ -15,7 +15,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_UID16 is not set
 # CONFIG_SYSFS_SYSCALL is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 CONFIG_ARCH_MULTI_V6=y
 CONFIG_ARCH_ASPEED=y

arch/arm/configs/at91_dt_defconfig

@@ -7,7 +7,7 @@ CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4T=y
 CONFIG_ARCH_MULTI_V5=y
 # CONFIG_ARCH_MULTI_V7 is not set

arch/arm/configs/axm55xx_defconfig

@@ -21,7 +21,7 @@ CONFIG_NAMESPACES=y
 CONFIG_SCHED_AUTOGROUP=y
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_ARCH_AXXIA=y
 CONFIG_ARM_LPAE=y

arch/arm/configs/bcm2835_defconfig

@@ -19,7 +19,7 @@ CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_CC_STACKPROTECTOR_REGULAR=y
 CONFIG_ARCH_MULTI_V6=y

arch/arm/configs/clps711x_defconfig

@@ -3,7 +3,7 @@ CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_RD_LZMA=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_JUMP_LABEL=y
 CONFIG_PARTITION_ADVANCED=y
 CONFIG_ARCH_CLPS711X=y

arch/arm/configs/keystone_defconfig

@@ -14,7 +14,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_ELF_CORE is not set
 # CONFIG_BASE_FULL is not set
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_ARCH_KEYSTONE=y
 CONFIG_ARM_LPAE=y

arch/arm/configs/lpc18xx_defconfig

@@ -14,7 +14,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_SIGNALFD is not set
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_MMU is not set
 CONFIG_ARCH_LPC18XX=y
 CONFIG_SET_MEM_PARAM=y

arch/arm/configs/lpc32xx_defconfig

@@ -9,7 +9,7 @@ CONFIG_SYSFS_DEPRECATED=y
 CONFIG_SYSFS_DEPRECATED_V2=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_LPC32XX=y
 CONFIG_AEABI=y

arch/arm/configs/milbeaut_m10v_defconfig

@@ -3,7 +3,7 @@ CONFIG_NO_HZ_IDLE=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 CONFIG_ARCH_MILBEAUT=y
 CONFIG_ARCH_MILBEAUT_M10V=y

arch/arm/configs/moxart_defconfig

@@ -10,7 +10,7 @@ CONFIG_IKCONFIG_PROC=y
 # CONFIG_TIMERFD is not set
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set

arch/arm/configs/multi_v4t_defconfig

@@ -2,7 +2,7 @@ CONFIG_KERNEL_LZMA=y
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4T=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_AT91=y

arch/arm/configs/multi_v7_defconfig

@@ -3,7 +3,7 @@ CONFIG_NO_HZ_IDLE=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 CONFIG_ARCH_VIRT=y
 CONFIG_ARCH_AIROHA=y

arch/arm/configs/pxa_defconfig

@@ -11,7 +11,7 @@ CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=13
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_PXA=y

arch/arm/configs/qcom_defconfig

@@ -7,7 +7,7 @@ CONFIG_IKCONFIG_PROC=y
 CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_ARCH_QCOM=y
 CONFIG_ARCH_MSM8X60=y

arch/arm/configs/sama5_defconfig

@@ -5,7 +5,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_AT91=y
 CONFIG_SOC_SAMA5D2=y
 CONFIG_SOC_SAMA5D3=y

arch/arm/configs/sama7_defconfig

@@ -12,7 +12,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_FHANDLE is not set
 # CONFIG_IO_URING is not set
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_AT91=y
 CONFIG_SOC_SAMA7G5=y
 CONFIG_ATMEL_CLOCKSOURCE_TCB=y

arch/arm/configs/socfpga_defconfig

@@ -7,7 +7,7 @@ CONFIG_CGROUPS=y
 CONFIG_CPUSETS=y
 CONFIG_NAMESPACES=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_ARCH_INTEL_SOCFPGA=y
 CONFIG_ARM_THUMBEE=y

arch/arm/configs/stm32_defconfig

@@ -11,7 +11,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_SIGNALFD is not set
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_MMU is not set
 CONFIG_ARCH_STM32=y

arch/arm/configs/tegra_defconfig

@@ -14,7 +14,7 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_ELF_CORE is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 CONFIG_ARCH_TEGRA=y
 CONFIG_SMP=y

arch/arm/configs/vf610m4_defconfig

@@ -5,7 +5,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_RD_XZ is not set
 # CONFIG_RD_LZ4 is not set
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_MMU is not set
 CONFIG_ARCH_MXC=y
 CONFIG_SOC_VF610=y

arch/arm/include/asm/irq.h

@@ -32,7 +32,7 @@ void handle_IRQ(unsigned int, struct pt_regs *);
 #include <linux/cpumask.h>
 
 extern void arch_trigger_cpumask_backtrace(const cpumask_t *mask,
-					   bool exclude_self);
+					   int exclude_cpu);
 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
 #endif
 

arch/arm/kernel/smp.c

@@ -846,7 +846,7 @@ static void raise_nmi(cpumask_t *mask)
 	__ipi_send_mask(ipi_desc[IPI_CPU_BACKTRACE], mask);
 }
 
-void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
+void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu)
 {
-	nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_nmi);
+	nmi_trigger_cpumask_backtrace(mask, exclude_cpu, raise_nmi);
 }

arch/arm64/Kconfig

@@ -1460,60 +1460,28 @@ config PARAVIRT_TIME_ACCOUNTING
 
 	  If in doubt, say N here.
 
-config KEXEC
-	depends on PM_SLEEP_SMP
-	select KEXEC_CORE
-	bool "kexec system call"
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-config KEXEC_FILE
-	bool "kexec file based system call"
-	select KEXEC_CORE
-	select HAVE_IMA_KEXEC if IMA
-	help
-	  This is new version of kexec system call. This system call is
-	  file based and takes file descriptors as system call argument
-	  for kernel and initramfs as opposed to list of segments as
-	  accepted by previous system call.
+config ARCH_SUPPORTS_KEXEC
+	def_bool PM_SLEEP_SMP
 
-config KEXEC_SIG
-	bool "Verify kernel signature during kexec_file_load() syscall"
-	depends on KEXEC_FILE
-	help
-	  Select this option to verify a signature with loaded kernel
-	  image. If configured, any attempt of loading a image without
-	  valid signature will fail.
+config ARCH_SUPPORTS_KEXEC_FILE
+	def_bool y
 
-	  In addition to that option, you need to enable signature
-	  verification for the corresponding kernel image type being
-	  loaded in order for this to work.
+config ARCH_SELECTS_KEXEC_FILE
+	def_bool y
+	depends on KEXEC_FILE
+	select HAVE_IMA_KEXEC if IMA
 
-config KEXEC_IMAGE_VERIFY_SIG
-	bool "Enable Image signature verification support"
-	default y
-	depends on KEXEC_SIG
-	depends on EFI && SIGNED_PE_FILE_VERIFICATION
-	help
-	  Enable Image signature verification support.
+config ARCH_SUPPORTS_KEXEC_SIG
+	def_bool y
 
-comment "Support for PE file signature verification disabled"
-	depends on KEXEC_SIG
-	depends on !EFI || !SIGNED_PE_FILE_VERIFICATION
+config ARCH_SUPPORTS_KEXEC_IMAGE_VERIFY_SIG
+	def_bool y
 
-config CRASH_DUMP
-	bool "Build kdump crash kernel"
-	help
-	  Generate crash dump after being started by kexec. This should
-	  be normally only set in special crash dump kernels which are
-	  loaded in the main kernel with kexec-tools into a specially
-	  reserved region and then later executed after a crash by
-	  kdump/kexec.
+config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG
+	def_bool y
 
-	  For more details see Documentation/admin-guide/kdump/kdump.rst
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool y
 
 config TRANS_TABLE
 	def_bool y

arch/hexagon/configs/comet_defconfig

@@ -14,7 +14,7 @@ CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=18
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"

arch/ia64/Kconfig

@@ -362,31 +362,13 @@ config IA64_HP_AML_NFW
 	  the "force" module parameter, e.g., with the "aml_nfw.force"
 	  kernel command line option.
 
-config KEXEC
-	bool "kexec system call"
-	depends on !SMP || HOTPLUG_CPU
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  The name comes from the similarity to the exec system call.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  is properly shutdown, so do not be surprised if this code does not
-	  initially work for you.  As of this writing the exact hardware
-	  interface is strongly in flux, so no good recommendation can be
-	  made.
+endmenu
 
-config CRASH_DUMP
-	  bool "kernel crash dumps"
-	  depends on IA64_MCA_RECOVERY && (!SMP || HOTPLUG_CPU)
-	  help
-	    Generate crash dump after being started by kexec.
+config ARCH_SUPPORTS_KEXEC
+	def_bool !SMP || HOTPLUG_CPU
 
-endmenu
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool IA64_MCA_RECOVERY && (!SMP || HOTPLUG_CPU)
 
 menu "Power management and ACPI options"
 

arch/ia64/include/asm/cmpxchg.h

@@ -13,4 +13,21 @@
 #define arch_cmpxchg_local		arch_cmpxchg
 #define arch_cmpxchg64_local		arch_cmpxchg64
 
+#ifdef CONFIG_IA64_DEBUG_CMPXCHG
+# define CMPXCHG_BUGCHECK_DECL	int _cmpxchg_bugcheck_count = 128;
+# define CMPXCHG_BUGCHECK(v)						\
+do {									\
+	if (_cmpxchg_bugcheck_count-- <= 0) {				\
+		void *ip;						\
+		extern int _printk(const char *fmt, ...);		\
+		ip = (void *) ia64_getreg(_IA64_REG_IP);		\
+		_printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v));\
+		break;							\
+	}								\
+} while (0)
+#else /* !CONFIG_IA64_DEBUG_CMPXCHG */
+# define CMPXCHG_BUGCHECK_DECL
+# define CMPXCHG_BUGCHECK(v)
+#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
+
 #endif /* _ASM_IA64_CMPXCHG_H */

arch/ia64/include/uapi/asm/cmpxchg.h

@@ -133,23 +133,6 @@ extern long ia64_cmpxchg_called_with_bad_pointer(void);
 #define cmpxchg64_local		cmpxchg64
 #endif
 
-#ifdef CONFIG_IA64_DEBUG_CMPXCHG
-# define CMPXCHG_BUGCHECK_DECL	int _cmpxchg_bugcheck_count = 128;
-# define CMPXCHG_BUGCHECK(v)						\
-do {									\
-	if (_cmpxchg_bugcheck_count-- <= 0) {				\
-		void *ip;						\
-		extern int _printk(const char *fmt, ...);		\
-		ip = (void *) ia64_getreg(_IA64_REG_IP);		\
-		_printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v));\
-		break;							\
-	}								\
-} while (0)
-#else /* !CONFIG_IA64_DEBUG_CMPXCHG */
-# define CMPXCHG_BUGCHECK_DECL
-# define CMPXCHG_BUGCHECK(v)
-#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
-
 #endif /* !__ASSEMBLY__ */
 
 #endif /* _UAPI_ASM_IA64_CMPXCHG_H */

arch/ia64/kernel/mca.c

@@ -1630,10 +1630,10 @@ default_monarch_init_process(struct notifier_block *self, unsigned long val, voi
 	}
 	printk("\n\n");
 	if (read_trylock(&tasklist_lock)) {
-		do_each_thread (g, t) {
+		for_each_process_thread(g, t) {
 			printk("\nBacktrace of pid %d (%s)\n", t->pid, t->comm);
 			show_stack(t, NULL, KERN_DEFAULT);
-		} while_each_thread (g, t);
+		}
 		read_unlock(&tasklist_lock);
 	}
 	/* FIXME: This will not restore zapped printk locks. */

arch/loongarch/Kconfig

@@ -538,28 +538,16 @@ config CPU_HAS_PREFETCH
 	bool
 	default y
 
-config KEXEC
-	bool "Kexec system call"
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
+config ARCH_SUPPORTS_KEXEC
+	def_bool y
 
-	  The name comes from the similarity to the exec system call.
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool y
 
-config CRASH_DUMP
-	bool "Build kdump crash kernel"
+config ARCH_SELECTS_CRASH_DUMP
+	def_bool y
+	depends on CRASH_DUMP
 	select RELOCATABLE
-	help
-	  Generate crash dump after being started by kexec. This should
-	  be normally only set in special crash dump kernels which are
-	  loaded in the main kernel with kexec-tools into a specially
-	  reserved region and then later executed after a crash by
-	  kdump/kexec.
-
-	  For more details see Documentation/admin-guide/kdump/kdump.rst
 
 config RELOCATABLE
 	bool "Relocatable kernel"

arch/loongarch/include/asm/irq.h

@@ -40,7 +40,7 @@ void spurious_interrupt(void);
 #define NR_IRQS_LEGACY 16
 
 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
-void arch_trigger_cpumask_backtrace(const struct cpumask *mask, bool exclude_self);
+void arch_trigger_cpumask_backtrace(const struct cpumask *mask, int exclude_cpu);
 
 #define MAX_IO_PICS 2
 #define NR_IRQS	(64 + (256 * MAX_IO_PICS))

arch/loongarch/kernel/process.c

@@ -338,9 +338,9 @@ static void raise_backtrace(cpumask_t *mask)
 	}
 }
 
-void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
+void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu)
 {
-	nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace);
+	nmi_trigger_cpumask_backtrace(mask, exclude_cpu, raise_backtrace);
 }
 
 #ifdef CONFIG_64BIT

arch/m68k/Kconfig

@@ -89,23 +89,8 @@ config MMU_SUN3
 	bool
 	depends on MMU && !MMU_MOTOROLA && !MMU_COLDFIRE
 
-config KEXEC
-	bool "kexec system call"
-	depends on M68KCLASSIC && MMU
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  The name comes from the similarity to the exec system call.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  is properly shutdown, so do not be surprised if this code does not
-	  initially work for you.  As of this writing the exact hardware
-	  interface is strongly in flux, so no good recommendation can be
-	  made.
+config ARCH_SUPPORTS_KEXEC
+	def_bool M68KCLASSIC && MMU
 
 config BOOTINFO_PROC
 	bool "Export bootinfo in procfs"

arch/m68k/configs/amcore_defconfig

@@ -8,7 +8,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_AIO is not set
 # CONFIG_ADVISE_SYSCALLS is not set
 # CONFIG_MEMBARRIER is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/m68k/configs/m5475evb_defconfig

@@ -8,7 +8,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_EVENTFD is not set
 # CONFIG_SHMEM is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MODULES=y
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_COLDFIRE=y

arch/m68k/configs/stmark2_defconfig

@@ -9,7 +9,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_AIO is not set
 # CONFIG_ADVISE_SYSCALLS is not set
 # CONFIG_MEMBARRIER is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_COLDFIRE=y

arch/microblaze/configs/mmu_defconfig

@@ -7,7 +7,7 @@ CONFIG_SYSFS_DEPRECATED=y
 CONFIG_SYSFS_DEPRECATED_V2=y
 # CONFIG_BASE_FULL is not set
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR=1
 CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR=1
 CONFIG_XILINX_MICROBLAZE0_USE_BARREL=1

arch/mips/Kconfig

@@ -2878,33 +2878,11 @@ config HZ
 config SCHED_HRTICK
 	def_bool HIGH_RES_TIMERS
 
-config KEXEC
-	bool "Kexec system call"
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  The name comes from the similarity to the exec system call.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  is properly shutdown, so do not be surprised if this code does not
-	  initially work for you.  As of this writing the exact hardware
-	  interface is strongly in flux, so no good recommendation can be
-	  made.
-
-config CRASH_DUMP
-	bool "Kernel crash dumps"
-	help
-	  Generate crash dump after being started by kexec.
-	  This should be normally only set in special crash dump kernels
-	  which are loaded in the main kernel with kexec-tools into
-	  a specially reserved region and then later executed after
-	  a crash by kdump/kexec. The crash dump kernel must be compiled
-	  to a memory address not used by the main kernel or firmware using
-	  PHYSICAL_START.
+config ARCH_SUPPORTS_KEXEC
+	def_bool y
+
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool y
 
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded"

arch/mips/cavium-octeon/setup.c

@@ -1240,7 +1240,7 @@ static int __init octeon_no_pci_init(void)
 	 */
 	octeon_dummy_iospace = vzalloc(IO_SPACE_LIMIT);
 	set_io_port_base((unsigned long)octeon_dummy_iospace);
-	ioport_resource.start = MAX_RESOURCE;
+	ioport_resource.start = RESOURCE_SIZE_MAX;
 	ioport_resource.end = 0;
 	return 0;
 }

arch/mips/configs/ath25_defconfig

@@ -11,7 +11,7 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_FHANDLE is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/mips/configs/ath79_defconfig

@@ -5,7 +5,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_RD_GZIP is not set
 # CONFIG_AIO is not set
 # CONFIG_KALLSYMS is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/mips/configs/bcm47xx_defconfig

@@ -2,7 +2,7 @@ CONFIG_SYSVIPC=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_BCM47XX=y
 CONFIG_PCI=y
 # CONFIG_SUSPEND is not set

arch/mips/configs/ci20_defconfig

@@ -18,7 +18,7 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MACH_INGENIC_SOC=y
 CONFIG_JZ4780_CI20=y
 CONFIG_HIGHMEM=y

arch/mips/configs/cu1000-neo_defconfig

@@ -15,7 +15,7 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_MACH_INGENIC_SOC=y

arch/mips/configs/cu1830-neo_defconfig

@@ -15,7 +15,7 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_MACH_INGENIC_SOC=y

arch/mips/configs/db1xxx_defconfig

@@ -17,7 +17,7 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MIPS_ALCHEMY=y
 CONFIG_HZ_100=y
 CONFIG_PCI=y

arch/mips/configs/gcw0_defconfig

@@ -2,7 +2,7 @@ CONFIG_DEFAULT_HOSTNAME="gcw0"
 CONFIG_NO_HZ_IDLE=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_PREEMPT_VOLUNTARY=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_MACH_INGENIC_SOC=y
 CONFIG_JZ4770_GCW0=y

arch/mips/configs/generic_defconfig

@@ -17,7 +17,7 @@ CONFIG_SCHED_AUTOGROUP=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_BPF_SYSCALL=y
 CONFIG_USERFAULTFD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_CPU_LITTLE_ENDIAN=y

arch/mips/configs/loongson2k_defconfig

@@ -18,7 +18,7 @@ CONFIG_SCHED_AUTOGROUP=y
 CONFIG_SYSFS_DEPRECATED=y
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MACH_LOONGSON64=y
 # CONFIG_CPU_LOONGSON3_CPUCFG_EMULATION is not set
 CONFIG_HZ_256=y

arch/mips/configs/loongson3_defconfig

@@ -26,7 +26,7 @@ CONFIG_SYSFS_DEPRECATED=y
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_BPF_SYSCALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_EVENTS=y
 CONFIG_MACH_LOONGSON64=y
 CONFIG_CPU_HAS_MSA=y

arch/mips/configs/malta_qemu_32r6_defconfig

@@ -5,7 +5,7 @@ CONFIG_NO_HZ=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=15
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MIPS_MALTA=y
 CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CPU_MIPS32_R6=y

arch/mips/configs/maltaaprp_defconfig

@@ -5,7 +5,7 @@ CONFIG_AUDIT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=15
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MIPS_MALTA=y
 CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CPU_MIPS32_R2=y

arch/mips/configs/maltasmvp_defconfig

@@ -5,7 +5,7 @@ CONFIG_NO_HZ=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=15
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MIPS_MALTA=y
 CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CPU_MIPS32_R2=y

arch/mips/configs/maltasmvp_eva_defconfig

@@ -5,7 +5,7 @@ CONFIG_NO_HZ=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=15
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MIPS_MALTA=y
 CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CPU_MIPS32_R2=y

arch/mips/configs/maltaup_defconfig

@@ -6,7 +6,7 @@ CONFIG_NO_HZ=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=15
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MIPS_MALTA=y
 CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CPU_MIPS32_R2=y

arch/mips/configs/omega2p_defconfig

@@ -17,7 +17,7 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/mips/configs/pic32mzda_defconfig

@@ -7,7 +7,7 @@ CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_RELAY=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_MACH_PIC32=y
 CONFIG_DTB_PIC32_MZDA_SK=y

arch/mips/configs/qi_lb60_defconfig

@@ -3,7 +3,7 @@ CONFIG_SYSVIPC=y
 # CONFIG_CROSS_MEMORY_ATTACH is not set
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_MACH_INGENIC_SOC=y

arch/mips/configs/rs90_defconfig

@@ -15,7 +15,7 @@ CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y
 # CONFIG_IO_URING is not set
 # CONFIG_ADVISE_SYSCALLS is not set
 # CONFIG_KALLSYMS is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_PERF_EVENTS is not set
 CONFIG_PROFILING=y
 CONFIG_MACH_INGENIC_SOC=y

arch/mips/configs/rt305x_defconfig

@@ -7,7 +7,7 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_AIO is not set
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/mips/configs/vocore2_defconfig

@@ -17,7 +17,7 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/mips/configs/xway_defconfig

@@ -7,7 +7,7 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_AIO is not set
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/mips/include/asm/irq.h

@@ -77,7 +77,7 @@ extern int cp0_fdc_irq;
 extern int get_c0_fdc_int(void);
 
 void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
-				    bool exclude_self);
+				    int exclude_cpu);
 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
 
 #endif /* _ASM_IRQ_H */

arch/mips/kernel/process.c

@@ -750,9 +750,9 @@ static void raise_backtrace(cpumask_t *mask)
 	}
 }
 
-void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
+void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu)
 {
-	nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace);
+	nmi_trigger_cpumask_backtrace(mask, exclude_cpu, raise_backtrace);
 }
 
 int mips_get_process_fp_mode(struct task_struct *task)

arch/nios2/configs/10m50_defconfig

@@ -9,7 +9,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_EVENTFD is not set
 # CONFIG_SHMEM is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_NIOS2_MEM_BASE=0x8000000

arch/nios2/configs/3c120_defconfig

@@ -9,7 +9,7 @@ CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_EVENTFD is not set
 # CONFIG_SHMEM is not set
 # CONFIG_AIO is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_NIOS2_MEM_BASE=0x10000000

arch/openrisc/configs/or1klitex_defconfig

@@ -6,7 +6,7 @@ CONFIG_USER_NS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_SGETMASK_SYSCALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_OPENRISC_BUILTIN_DTB="or1klitex"
 CONFIG_HZ_100=y
 CONFIG_OPENRISC_HAVE_SHADOW_GPRS=y

arch/parisc/Kconfig

@@ -359,29 +359,17 @@ config NR_CPUS
 	default "8" if 64BIT
 	default "16"
 
-config KEXEC
-	bool "Kexec system call"
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  shutdown, so do not be surprised if this code does not
-	  initially work for you.
-
-config KEXEC_FILE
-	bool "kexec file based system call"
-	select KEXEC_CORE
-	select KEXEC_ELF
-	help
-	  This enables the kexec_file_load() System call. This is
-	  file based and takes file descriptors as system call argument
-	  for kernel and initramfs as opposed to list of segments as
-	  accepted by previous system call.
-
 endmenu
 
+config ARCH_SUPPORTS_KEXEC
+	def_bool y
+
+config ARCH_SUPPORTS_KEXEC_FILE
+	def_bool y
+
+config ARCH_SELECTS_KEXEC_FILE
+	def_bool y
+	depends on KEXEC_FILE
+	select KEXEC_ELF
+
 source "drivers/parisc/Kconfig"

arch/powerpc/Kconfig

@@ -592,41 +592,21 @@ config PPC64_SUPPORTS_MEMORY_FAILURE
 	default "y" if PPC_POWERNV
 	select ARCH_SUPPORTS_MEMORY_FAILURE
 
-config KEXEC
-	bool "kexec system call"
-	depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP)
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  The name comes from the similarity to the exec system call.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  is properly shutdown, so do not be surprised if this code does not
-	  initially work for you.  As of this writing the exact hardware
-	  interface is strongly in flux, so no good recommendation can be
-	  made.
-
-config KEXEC_FILE
-	bool "kexec file based system call"
-	select KEXEC_CORE
-	select HAVE_IMA_KEXEC if IMA
-	select KEXEC_ELF
-	depends on PPC64
-	depends on CRYPTO=y
-	depends on CRYPTO_SHA256=y
-	help
-	  This is a new version of the kexec system call. This call is
-	  file based and takes in file descriptors as system call arguments
-	  for kernel and initramfs as opposed to a list of segments as is the
-	  case for the older kexec call.
+config ARCH_SUPPORTS_KEXEC
+	def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
+
+config ARCH_SUPPORTS_KEXEC_FILE
+	def_bool PPC64 && CRYPTO=y && CRYPTO_SHA256=y
 
-config ARCH_HAS_KEXEC_PURGATORY
+config ARCH_SUPPORTS_KEXEC_PURGATORY
 	def_bool KEXEC_FILE
 
+config ARCH_SELECTS_KEXEC_FILE
+	def_bool y
+	depends on KEXEC_FILE
+	select KEXEC_ELF
+	select HAVE_IMA_KEXEC if IMA
+
 config PPC64_BIG_ENDIAN_ELF_ABI_V2
 	# Option is available to BFD, but LLD does not support ELFv1 so this is
 	# always true there.
@@ -686,14 +666,13 @@ config RELOCATABLE_TEST
 	  loaded at, which tends to be non-zero and therefore test the
 	  relocation code.
 
-config CRASH_DUMP
-	bool "Build a dump capture kernel"
-	depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
+
+config ARCH_SELECTS_CRASH_DUMP
+	def_bool y
+	depends on CRASH_DUMP
 	select RELOCATABLE if PPC64 || 44x || PPC_85xx
-	help
-	  Build a kernel suitable for use as a dump capture kernel.
-	  The same kernel binary can be used as production kernel and dump
-	  capture kernel.
 
 config FA_DUMP
 	bool "Firmware-assisted dump"

arch/powerpc/configs/40x/klondike_defconfig

@@ -4,7 +4,7 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_SYSFS_DEPRECATED=y
 CONFIG_SYSFS_DEPRECATED_V2=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_APM8018X=y

arch/powerpc/configs/44x/fsp2_defconfig

@@ -15,7 +15,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_RD_LZ4 is not set
 CONFIG_KALLSYMS_ALL=y
 CONFIG_BPF_SYSCALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PROFILING=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y

arch/powerpc/configs/52xx/tqm5200_defconfig

@@ -3,7 +3,7 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_KALLSYMS is not set
 # CONFIG_EPOLL is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODVERSIONS=y

arch/powerpc/configs/mgcoge_defconfig

@@ -9,7 +9,7 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_RD_GZIP is not set
 CONFIG_KALLSYMS_ALL=y
 # CONFIG_PCSPKR_PLATFORM is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PARTITION_ADVANCED=y
 # CONFIG_PPC_PMAC is not set
 CONFIG_PPC_82xx=y

arch/powerpc/configs/microwatt_defconfig

@@ -8,7 +8,7 @@ CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set

arch/powerpc/configs/ps3_defconfig

@@ -3,7 +3,7 @@ CONFIG_POSIX_MQUEUE=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_PERF_EVENTS is not set
 CONFIG_PROFILING=y
 CONFIG_PPC64=y

arch/powerpc/include/asm/irq.h

@@ -55,7 +55,7 @@ int irq_choose_cpu(const struct cpumask *mask);
 
 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_NMI_IPI)
 extern void arch_trigger_cpumask_backtrace(const cpumask_t *mask,
-					   bool exclude_self);
+					   int exclude_cpu);
 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
 #endif
 

arch/powerpc/kernel/stacktrace.c

@@ -221,8 +221,8 @@ static void raise_backtrace_ipi(cpumask_t *mask)
 	}
 }
 
-void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
+void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu)
 {
-	nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace_ipi);
+	nmi_trigger_cpumask_backtrace(mask, exclude_cpu, raise_backtrace_ipi);
 }
 #endif /* defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_NMI_IPI) */

arch/powerpc/kernel/watchdog.c

@@ -245,7 +245,7 @@ static void watchdog_smp_panic(int cpu)
 			__cpumask_clear_cpu(c, &wd_smp_cpus_ipi);
 		}
 	} else {
-		trigger_allbutself_cpu_backtrace();
+		trigger_allbutcpu_cpu_backtrace(cpu);
 		cpumask_clear(&wd_smp_cpus_ipi);
 	}
 
@@ -416,7 +416,7 @@ DEFINE_INTERRUPT_HANDLER_NMI(soft_nmi_interrupt)
 		xchg(&__wd_nmi_output, 1); // see wd_lockup_ipi
 
 		if (sysctl_hardlockup_all_cpu_backtrace)
-			trigger_allbutself_cpu_backtrace();
+			trigger_allbutcpu_cpu_backtrace(cpu);
 
 		if (hardlockup_panic)
 			nmi_panic(regs, "Hard LOCKUP");

arch/riscv/Kbuild

@@ -5,7 +5,7 @@ obj-$(CONFIG_BUILTIN_DTB) += boot/dts/
 obj-y += errata/
 obj-$(CONFIG_KVM) += kvm/
 
-obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += purgatory/
+obj-$(CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY) += purgatory/
 
 # for cleaning
 subdir- += boot

arch/riscv/Kconfig

@@ -656,48 +656,30 @@ config RISCV_BOOT_SPINWAIT
 
 	  If unsure what to do here, say N.
 
-config KEXEC
-	bool "Kexec system call"
-	depends on MMU
+config ARCH_SUPPORTS_KEXEC
+	def_bool MMU
+
+config ARCH_SELECTS_KEXEC
+	def_bool y
+	depends on KEXEC
 	select HOTPLUG_CPU if SMP
-	select KEXEC_CORE
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel. It is like a reboot
-	  but it is independent of the system firmware. And like a reboot
-	  you can start any kernel with it, not just Linux.
 
-	  The name comes from the similarity to the exec system call.
+config ARCH_SUPPORTS_KEXEC_FILE
+	def_bool 64BIT && MMU
 
-config KEXEC_FILE
-	bool "kexec file based systmem call"
-	depends on 64BIT && MMU
+config ARCH_SELECTS_KEXEC_FILE
+	def_bool y
+	depends on KEXEC_FILE
 	select HAVE_IMA_KEXEC if IMA
-	select KEXEC_CORE
 	select KEXEC_ELF
-	help
-	  This is new version of kexec system call. This system call is
-	  file based and takes file descriptors as system call argument
-	  for kernel and initramfs as opposed to list of segments as
-	  accepted by previous system call.
-
-	  If you don't know what to do here, say Y.
 
-config ARCH_HAS_KEXEC_PURGATORY
+config ARCH_SUPPORTS_KEXEC_PURGATORY
 	def_bool KEXEC_FILE
 	depends on CRYPTO=y
 	depends on CRYPTO_SHA256=y
 
-config CRASH_DUMP
-	bool "Build kdump crash kernel"
-	help
-	  Generate crash dump after being started by kexec. This should
-	  be normally only set in special crash dump kernels which are
-	  loaded in the main kernel with kexec-tools into a specially
-	  reserved region and then later executed after a crash by
-	  kdump/kexec.
-
-	  For more details see Documentation/admin-guide/kdump/kdump.rst
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool y
 
 config COMPAT
 	bool "Kernel support for 32-bit U-mode"

arch/riscv/configs/nommu_k210_defconfig

@@ -21,7 +21,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_IO_URING is not set
 # CONFIG_ADVISE_SYSCALLS is not set
 # CONFIG_KALLSYMS is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_SLUB=y

arch/riscv/configs/nommu_k210_sdcard_defconfig

@@ -13,7 +13,7 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_IO_URING is not set
 # CONFIG_ADVISE_SYSCALLS is not set
 # CONFIG_KALLSYMS is not set
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
 CONFIG_SLUB=y

arch/riscv/kernel/elf_kexec.c

@@ -260,7 +260,7 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 		cmdline = modified_cmdline;
 	}
 
-#ifdef CONFIG_ARCH_HAS_KEXEC_PURGATORY
+#ifdef CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY
 	/* Add purgatory to the image */
 	kbuf.top_down = true;
 	kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
@@ -274,7 +274,7 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 					     sizeof(kernel_start), 0);
 	if (ret)
 		pr_err("Error update purgatory ret=%d\n", ret);
-#endif /* CONFIG_ARCH_HAS_KEXEC_PURGATORY */
+#endif /* CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY */
 
 	/* Add the initrd to the image */
 	if (initrd != NULL) {