[PATCH v5 2/2] crash: update stale NR_CPUS_DEFAULT references in elfcorehdr sizing docs

Ionut Nechita (Wind River) ionut.nechita at windriver.com
Tue Sep 1 00:10:41 PDT 2026


From: Ionut Nechita <ionut.nechita at windriver.com>

The elfcorehdr reservation is now sized with NR_CPUS, but two comments
still name NR_CPUS_DEFAULT: the one above crash_handle_hotplug_event()
and the CRASH_MAX_MEMORY_RANGES help text.

Update both.  Documentation only, no functional change.

Suggested-by: Jinjie Ruan <ruanjinjie at huawei.com>
Suggested-by: Bradley Morgan <brads at mainlining.org>
Assisted-by: LLM
Signed-off-by: Ionut Nechita <ionut.nechita at windriver.com>
Reviewed-by: Bradley Morgan <brads at mainlining.org>
---
 kernel/Kconfig.kexec | 2 +-
 kernel/crash_core.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
index 15632358bcf7..a97ed9605602 100644
--- a/kernel/Kconfig.kexec
+++ b/kernel/Kconfig.kexec
@@ -167,7 +167,7 @@ config CRASH_MAX_MEMORY_RANGES
 	  memory regions that the elfcorehdr buffer/segment can accommodate.
 	  These regions are obtained via walk_system_ram_res(); eg. the
 	  'System RAM' entries in /proc/iomem.
-	  This value is combined with NR_CPUS_DEFAULT and multiplied by
+	  This value is combined with NR_CPUS and multiplied by
 	  sizeof(Elf64_Phdr) to determine the final elfcorehdr memory buffer/
 	  segment size.
 	  The value 8192, for example, covers a (sparsely populated) 1TiB system
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 2b36aa9fade0..d0bd2d0cf899 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -648,7 +648,7 @@ int crash_check_hotplug_support(void)
  * new list of CPUs and memory. To make changes to the elfcorehdr, it
  * should be large enough to permit a growing number of CPU and Memory
  * resources. One can estimate the elfcorehdr memory size based on
- * NR_CPUS_DEFAULT and CRASH_MAX_MEMORY_RANGES. The elfcorehdr is
+ * NR_CPUS and CRASH_MAX_MEMORY_RANGES. The elfcorehdr is
  * excluded from SHA verification by default if the architecture
  * supports crash hotplug.
  */
-- 
2.55.0




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