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
  ...

24 files changed, 29 insertions, 50 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7a27550ff3c1..9557808e8937 100644
--- a/arch/arm/Kconfig
+++ b/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
diff --git a/arch/arm/configs/aspeed_g4_defconfig b/arch/arm/configs/aspeed_g4_defconfig
index a5c65d28ca63..ed66a2958912 100644
--- a/arch/arm/configs/aspeed_g4_defconfig
+++ b/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
diff --git a/arch/arm/configs/aspeed_g5_defconfig b/arch/arm/configs/aspeed_g5_defconfig
index c7c11cbaa39d..b6487a4b45c0 100644
--- a/arch/arm/configs/aspeed_g5_defconfig
+++ b/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
diff --git a/arch/arm/configs/at91_dt_defconfig b/arch/arm/configs/at91_dt_defconfig
index 8cc602853cc5..71b5acc78187 100644
--- a/arch/arm/configs/at91_dt_defconfig
+++ b/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
diff --git a/arch/arm/configs/axm55xx_defconfig b/arch/arm/configs/axm55xx_defconfig
index d1c550894a65..516689dc6cf1 100644
--- a/arch/arm/configs/axm55xx_defconfig
+++ b/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
diff --git a/arch/arm/configs/bcm2835_defconfig b/arch/arm/configs/bcm2835_defconfig
index ce092abcd323..225a16c0323c 100644
--- a/arch/arm/configs/bcm2835_defconfig
+++ b/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
diff --git a/arch/arm/configs/clps711x_defconfig b/arch/arm/configs/clps711x_defconfig
index adcee238822a..d7ed1e7c6a90 100644
--- a/arch/arm/configs/clps711x_defconfig
+++ b/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
diff --git a/arch/arm/configs/keystone_defconfig b/arch/arm/configs/keystone_defconfig
index 1cb145633a91..d95686d19401 100644
--- a/arch/arm/configs/keystone_defconfig
+++ b/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
diff --git a/arch/arm/configs/lpc18xx_defconfig b/arch/arm/configs/lpc18xx_defconfig
index 56eae6a0a311..d169da9b2824 100644
--- a/arch/arm/configs/lpc18xx_defconfig
+++ b/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
diff --git a/arch/arm/configs/lpc32xx_defconfig b/arch/arm/configs/lpc32xx_defconfig
index e2b0ff0b253f..42053e45f730 100644
--- a/arch/arm/configs/lpc32xx_defconfig
+++ b/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
diff --git a/arch/arm/configs/milbeaut_m10v_defconfig b/arch/arm/configs/milbeaut_m10v_defconfig
index 7d4284502325..f5eeac9c65c3 100644
--- a/arch/arm/configs/milbeaut_m10v_defconfig
+++ b/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
diff --git a/arch/arm/configs/moxart_defconfig b/arch/arm/configs/moxart_defconfig
index ea31f116d577..bb6a5222e42f 100644
--- a/arch/arm/configs/moxart_defconfig
+++ b/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
diff --git a/arch/arm/configs/multi_v4t_defconfig b/arch/arm/configs/multi_v4t_defconfig
index b60000a89aff..a7fabf1d88ff 100644
--- a/arch/arm/configs/multi_v4t_defconfig
+++ b/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
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index c7b2550d706c..766f2f83e2c9 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/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
diff --git a/arch/arm/configs/pxa_defconfig b/arch/arm/configs/pxa_defconfig
index b0c3355e2599..23c131b0854b 100644
--- a/arch/arm/configs/pxa_defconfig
+++ b/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
diff --git a/arch/arm/configs/qcom_defconfig b/arch/arm/configs/qcom_defconfig
index ab686b9c2ad8..737d51412eb2 100644
--- a/arch/arm/configs/qcom_defconfig
+++ b/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
diff --git a/arch/arm/configs/sama5_defconfig b/arch/arm/configs/sama5_defconfig
index 56ee511210de..0e030063130f 100644
--- a/arch/arm/configs/sama5_defconfig
+++ b/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
diff --git a/arch/arm/configs/sama7_defconfig b/arch/arm/configs/sama7_defconfig
index a89767c89d17..be0cfed4ecf1 100644
--- a/arch/arm/configs/sama7_defconfig
+++ b/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
diff --git a/arch/arm/configs/socfpga_defconfig b/arch/arm/configs/socfpga_defconfig
index d6dfae196f84..e82c3866b810 100644
--- a/arch/arm/configs/socfpga_defconfig
+++ b/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
diff --git a/arch/arm/configs/stm32_defconfig b/arch/arm/configs/stm32_defconfig
index dc1a32f50b7e..e95aba916547 100644
--- a/arch/arm/configs/stm32_defconfig
+++ b/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
diff --git a/arch/arm/configs/tegra_defconfig b/arch/arm/configs/tegra_defconfig
index 3c6af935e932..613f07b8ce15 100644
--- a/arch/arm/configs/tegra_defconfig
+++ b/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
diff --git a/arch/arm/configs/vf610m4_defconfig b/arch/arm/configs/vf610m4_defconfig
index 2e47cc57a928..963ff0a03311 100644
--- a/arch/arm/configs/vf610m4_defconfig
+++ b/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
diff --git a/arch/arm/include/asm/irq.h b/arch/arm/include/asm/irq.h
index 18605f1b3580..26c1d2ced4ce 100644
--- a/arch/arm/include/asm/irq.h
+++ b/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
 
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 6756203e45f3..3431c0553f45 100644
--- a/arch/arm/kernel/smp.c
+++ b/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);
 }