The select of KEXEC for CRASH_DUMP in kernel/Kconfig.kexec will be
dropped, then compiling errors will be triggered if below config items are
set:

===
CONFIG_CRASH_CORE=y
CONFIG_KEXEC_CORE=y
CONFIG_CRASH_DUMP=y
===

Here, change the dependency of buinding machine_kexec.o relocate_kernel.o
and the ifdeffery in asm/kexe.h to CONFIG_KEXEC_CORE.

Link: https://lkml.kernel.org/r/20231208073036.7884-3-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Eric DeVolder <eric_devolder@yahoo.com>
Cc: Ignat Korchagin <ignat@cloudflare.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Pull m68knommu updates from Greg Ungerer:
 "A few changes, most of them related to fixing warnings when compiling
  with "W=1". These follow up Geert's recent changes for M68K for this
  too. These ones complete the fixes for the nommu and ColdFire specific
  code.

  Also a couple of other fixes to improve ROM default addressing and
  compiling for the Cleopatra boards.

  Summary:

   - improve default Kconfig ROM section settings

   - fix compilation for some Cleopatra boards

   - fixes and cleanups for warnings compiling with 'W=1'"

* tag 'm68knommu-for-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: 68000: fix warning in timer code
  m68k: 68000: fix warnings in 68000 interrupt handling
  m68k: coldfire: remove unused variable in MMU code
  m68k: coldfire: fix warnings in uboot argument processing
  m68k: coldfire: make mcf_maskimr() static
  m68k: coldfire: ensure gpio prototypes visible
  m68k: coldfire: add and use "vectors.h"
  m68knommu: fix compilation for ColdFire/Cleopatra boards
  m68knommu: improve config ROM setting defaults

Pull ia64 removal and asm-generic updates from Arnd Bergmann:

 - The ia64 architecture gets its well-earned retirement as planned,
   now that there is one last (mostly) working release that will be
   maintained as an LTS kernel.

 - The architecture specific system call tables are updated for the
   added map_shadow_stack() syscall and to remove references to the
   long-gone sys_lookup_dcookie() syscall.

* tag 'asm-generic-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  hexagon: Remove unusable symbols from the ptrace.h uapi
  asm-generic: Fix spelling of architecture
  arch: Reserve map_shadow_stack() syscall number for all architectures
  syscalls: Cleanup references to sys_lookup_dcookie()
  Documentation: Drop or replace remaining mentions of IA64
  lib/raid6: Drop IA64 support
  Documentation: Drop IA64 from feature descriptions
  kernel: Drop IA64 support from sig_fault handlers
  arch: Remove Itanium (IA-64) architecture

Pull dma-mapping updates from Christoph Hellwig:

 - get rid of the fake support for coherent DMA allocation on coldfire
   with caches (Christoph Hellwig)

 - add a few Kconfig dependencies so that Kconfig catches the use of
   invalid configurations (Christoph Hellwig)

 - fix a type in dma-debug output (Chuck Lever)

 - rewrite a comment in swiotlb (Sean Christopherson)

* tag 'dma-mapping-6.7-2023-10-30' of git://git.infradead.org/users/hch/dma-mapping:
  dma-debug: Fix a typo in a debugging eye-catcher
  swiotlb: rewrite comment explaining why the source is preserved on DMA_FROM_DEVICE
  m68k: remove unused includes from dma.c
  m68k: don't provide arch_dma_alloc for nommu/coldfire
  net: fec: use dma_alloc_noncoherent for data cache enabled coldfire
  m68k: use the coherent DMA code for coldfire without data cache
  dma-direct: warn when coherent allocations aren't supported
  dma-direct: simplify the use atomic pool logic in dma_direct_alloc
  dma-direct: add a CONFIG_ARCH_HAS_DMA_ALLOC symbol
  dma-direct: add dependencies to CONFIG_DMA_GLOBAL_POOL

Pull m68k updates from Geert Uytterhoeven:

 - misc aesthetical improvements for the floating point emulator

 - remove the last user of strlcpy()

 - use kernel's generic libgcc functions

 - misc fixes for W=1 builds

 - misc indentation fixes

 - misc fixes and improvements

 - defconfig updates

* tag 'm68k-for-v6.7-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: (72 commits)
  m68k: lib: Include <linux/libgcc.h> for __muldi3()
  m68k: fpsp040: Fix indentation by 5 spaces
  m68k: Fix indentation by 2 or 5 spaces in <asm/page_mm.h>
  m68k: kernel: Fix indentation by 7 spaces in traps.c
  m68k: sun3: Fix indentation by 5 or 7 spaces
  m68k: Fix indentation by 7 spaces in <asm/io_mm.h>
  m68k: defconfig: Update virt_defconfig for v6.6-rc3
  m68k: defconfig: Update defconfigs for v6.6-rc1
  m68k: io: Mark mmio read addresses as const
  m68k: Replace GPL 2.0+ README.legal boilerplate with SPDX
  m68k: sun3: Change led_pattern[] to unsigned char
  m68k: Add missing types to asm/irq.h
  m68k: sun3/3x: Add and use "sun3.h"
  m68k: sun3x: Make dvma_print() static
  m68k: sun3x: Make sun3x_halt() static
  m68k: sun3x: Do not mark dvma_map_iommu() inline
  m68k: sun3x: Fix signature of sun3_leds()
  m68k: sun3: Make sun3_platform_init() static
  m68k: sun3: Make print_pte() static
  m68k: sun3: Annotate prom_printf() with __printf()
  ...

When building with W=1:

      CC      arch/m68k/kernel/uboot.o
    arch/m68k/kernel/uboot.c: In function ‘parse_uboot_commandline’:
    arch/m68k/kernel/uboot.c:68:36: warning: variable ‘uboot_initrd_end’ set but not used [-Wunused-but-set-variable]
      unsigned long uboot_initrd_start, uboot_initrd_end;
                                        ^~~~~~~~~~~~~~~~
    arch/m68k/kernel/uboot.c:68:16: warning: variable ‘uboot_initrd_start’ set but not used [-Wunused-but-set-variable]
      unsigned long uboot_initrd_start, uboot_initrd_end;
                    ^~~~~~~~~~~~~~~~~~
    arch/m68k/kernel/uboot.c:66:16: warning: variable ‘uboot_kbd’ set but not used [-Wunused-but-set-variable]
      unsigned long uboot_kbd;
                    ^~~~~~~~~
    arch/m68k/kernel/uboot.c: At top level:
    arch/m68k/kernel/uboot.c:90:13: warning: no previous prototype for ‘process_uboot_commandline’ [-Wmissing-prototypes]
     __init void process_uboot_commandline(char *commandp, int size)
                 ^~~~~~~~~~~~~~~~~~~~~~~~~

A couple of issues here. Firstly we already have a bootinfo.h that has a
prototype for process_uboot_commandline(), we should include that.
Secondly uboot_kbd is not used at all and can be removed. Thirdly the
conditional code based on CONFIG_BLK_DEV_INITRD means that sometimes
uboot_initrd_start and uboot_initrd_end are not needed. Make their
declaration and asignment conditional on CONFIG_BLK_DEV_INITRD same as
the code that uses them.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>

dma.c doesn't need most of the headers it includes.  Also there is
no point in undefining the DEBUG symbol given that it isn't used
anywhere in this small file.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>

Coldfire cores configured with a data cache can't provide coherent
DMA allocations at all.

Instead of returning non-coherent kernel memory in this case,
return NULL and fail the allocation.

The only driver that used to rely on the previous behavior (fec) has
been switched to use non-coherent allocations for this case recently.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>

Coldfire cores configured without a data cache are DMA coherent and
should thus simply use the simple coherent version of dma-direct.

Introduce a new COLDFIRE_COHERENT_DMA Kconfig symbol as a convenient
short hand for such configurations, and a M68K_NONCOHERENT_DMA symbol
for all cases where we need to build non-coherent DMA infrastructure
to simplify the Kconfig and code conditionals.

Not building the non-coherent DMA code slightly reduces the code
size for such configurations.

Numers for m5249evb_defconfig below:

  text	   data	    bss	    dec	    hex	filename
2896158	 401052	  65392	3362602	 334f2a	vmlinux.before
2895166	 400988	  65392	3361546	 334b0a	vmlinux.after

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>

Indentation should use TABs, not spaces.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/d1b38c9d389c1135f7856cf5f90852c2f1584c50.1696602993.git.geert@linux-m68k.org