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
  ...

3 files changed, 10 insertions, 40 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 6be32254211c..33530b044953 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -549,44 +549,14 @@ menu "Kernel features"
 
 source "kernel/Kconfig.hz"
 
-config KEXEC
-	bool "kexec system call (EXPERIMENTAL)"
-	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.
-
-	  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 (EXPERIMENTAL)"
-	depends on BROKEN_ON_SMP
-	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 using
-	  PHYSICAL_START.
-
-	  For more details see Documentation/admin-guide/kdump/kdump.rst
-
-config KEXEC_JUMP
-	bool "kexec jump (EXPERIMENTAL)"
-	depends on KEXEC && HIBERNATION
-	help
-	  Jump between original kernel and kexeced kernel and invoke
-	  code via KEXEC
+config ARCH_SUPPORTS_KEXEC
+	def_bool MMU
+
+config ARCH_SUPPORTS_CRASH_DUMP
+	def_bool BROKEN_ON_SMP
+
+config ARCH_SUPPORTS_KEXEC_JUMP
+	def_bool y
 
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
diff --git a/arch/sh/configs/rsk7264_defconfig b/arch/sh/configs/rsk7264_defconfig
index de9e350cdf28..a88cb3b77957 100644
--- a/arch/sh/configs/rsk7264_defconfig
+++ b/arch/sh/configs/rsk7264_defconfig
@@ -9,7 +9,7 @@ CONFIG_SYSFS_DEPRECATED=y
 CONFIG_SYSFS_DEPRECATED_V2=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KALLSYMS_ALL=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 CONFIG_PERF_COUNTERS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 CONFIG_MMAP_ALLOW_UNINITIALIZED=y
diff --git a/arch/sh/configs/rsk7269_defconfig b/arch/sh/configs/rsk7269_defconfig
index 7ca6a5c25a9f..d9a7ce783c9b 100644
--- a/arch/sh/configs/rsk7269_defconfig
+++ b/arch/sh/configs/rsk7269_defconfig
@@ -1,6 +1,6 @@
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-CONFIG_EMBEDDED=y
+CONFIG_EXPERT=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_SWAP_IO_SPACE=y