Documentation: kdump: clean up the outdated description

After commit 443cbaf9e2fd ("crash: split vmcoreinfo exporting code out
from crash_core.c"), Kconfig item CRASH_CORE has gone away in kernel.
Items VMCORE_INFO and CRASH_RESERVE are used instead.

So clean up the outdated description about CRASH_CORE and update it
accordingly.

Link: https://lkml.kernel.org/r/20240329132825.1102459-3-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/admin-guide/kdump/kdump.rst b/Documentation/admin-guide/kdump/kdump.rst
index 0302a93b1d40b7b0e6265306e580bfe32c9afd1b..5376890adbeb079574d812a1a775c1db1f587853 100644 (file)
--- a/Documentation/admin-guide/kdump/kdump.rst
+++ b/Documentation/admin-guide/kdump/kdump.rst
@@ -136,10 +136,6 @@ System kernel config options
 
        CONFIG_KEXEC_CORE=y
 
-   Subsequently, CRASH_CORE is selected by KEXEC_CORE::
-
-       CONFIG_CRASH_CORE=y
-
 2) Enable "sysfs file system support" in "Filesystem" -> "Pseudo
    filesystems." This is usually enabled by default::
 
@@ -168,6 +164,10 @@ Dump-capture kernel config options (Arch Independent)
 
        CONFIG_CRASH_DUMP=y
 
+   And this will select VMCORE_INFO and CRASH_RESERVE::
+       CONFIG_VMCORE_INFO=y
+       CONFIG_CRASH_RESERVE=y
+
 2) Enable "/proc/vmcore support" under "Filesystems" -> "Pseudo filesystems"::
 
        CONFIG_PROC_VMCORE=y