x86/crash: Use crash_prepare_headers() helper to simplify code

Browse source

Use the newly introduced crash_prepare_headers() function to replace
the existing prepare_elf_headers(), allocate cmem and exclude crash kernel
memory in the crash core, which reduce code duplication.

Only the following three architecture functions need to be implemented:
- arch_get_system_nr_ranges(). Call get_nr_ram_ranges_callback()
  to pre-count the max number of memory ranges.

- arch_crash_populate_cmem(). Use prepare_elf64_ram_headers_callback()
  to collect the memory ranges and fills them into cmem.

- arch_crash_exclude_ranges(). Exclude the low 1M for x86.

While at it, remove the unused "nr_mem_ranges" in
arch_crash_handle_hotplug_event().

Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://patch.msgid.link/20260629094746.191843-6-ruanjinjie@huawei.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

...

This commit is contained in:

Jinjie Ruan 2026-06-29 17:47:41 +08:00 • committed by Mike Rapoport (Microsoft)

parent 201b561cbc

commit a8f09f2a74

1 changed files with 11 additions and 78 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

89

arch/x86/kernel/crash.c

View file