[PATCH v5 2/3] Documentation/ABI: mark old kexec sysfs deprecated

[Sourabh Jain]

The previous commit ("kexec: move sysfs entries to /sys/kernel/kexec")
moved all existing kexec sysfs entries to a new location. The ABI
document is updated to include a note about the deprecation of the old
kexec sysfs entries.

The following kexec sysfs entries are deprecated:
- /sys/kernel/kexec_loaded
- /sys/kernel/kexec_crash_loaded
- /sys/kernel/kexec_crash_size
- /sys/kernel/crash_elfcorehdr_size

Cc: Aditya Gupta <adityag at linux.ibm.com>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Baoquan he <bhe at redhat.com>
Cc: Dave Young <dyoung at redhat.com>
Cc: Hari Bathini <hbathini at linux.ibm.com>
Cc: Jiri Bohac <jbohac at suse.cz>
Cc: Madhavan Srinivasan <maddy at linux.ibm.com>
Cc: Mahesh J Salgaonkar <mahesh at linux.ibm.com>
Cc: Pingfan Liu <piliu at redhat.com>
Cc: Ritesh Harjani (IBM) <ritesh.list at gmail.com>
Cc: Shivang Upadhyay <shivangu at linux.ibm.com>
Cc: Vivek Goyal <vgoyal at redhat.com>
Cc: linuxppc-dev at lists.ozlabs.org
Cc: kexec at lists.infradead.org
Signed-off-by: Sourabh Jain <sourabhjain at linux.ibm.com>
---
 .../ABI/obsolete/sysfs-kernel-kexec-kdump     | 59 +++++++++++++++++++
 .../ABI/testing/sysfs-kernel-kexec-kdump      | 44 --------------
 2 files changed, 59 insertions(+), 44 deletions(-)
 create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump

diff --git a/Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump b/Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
new file mode 100644
index 000000000000..96b4d41721cc
--- /dev/null
+++ b/Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
@@ -0,0 +1,59 @@
+NOTE: all the ABIs listed in this file are deprecated and will be removed after 2028.
+
+Here are the alternative ABIs:
++------------------------------------+-----------------------------------------+
+| Deprecated                         | Alternative                             |
++------------------------------------+-----------------------------------------+
+| /sys/kernel/kexec_loaded           | /sys/kernel/kexec/loaded                |
++------------------------------------+-----------------------------------------+
+| /sys/kernel/kexec_crash_loaded     | /sys/kernel/kexec/crash_loaded          |
++------------------------------------+-----------------------------------------+
+| /sys/kernel/kexec_crash_size       | /sys/kernel/kexec/crash_size            |
++------------------------------------+-----------------------------------------+
+| /sys/kernel/crash_elfcorehdr_size  | /sys/kernel/kexec/crash_elfcorehdr_size |
++------------------------------------+-----------------------------------------+
+
+
+What:		/sys/kernel/kexec_loaded
+Date:		Jun 2006
+Contact:	kexec at lists.infradead.org
+Description:	read only
+		Indicates whether a new kernel image has been loaded
+		into memory using the kexec system call. It shows 1 if
+		a kexec image is present and ready to boot, or 0 if none
+		is loaded.
+User:		kexec tools, kdump service
+
+What:		/sys/kernel/kexec_crash_loaded
+Date:		Jun 2006
+Contact:	kexec at lists.infradead.org
+Description:	read only
+		Indicates whether a crash (kdump) kernel is currently
+		loaded into memory. It shows 1 if a crash kernel has been
+		successfully loaded for panic handling, or 0 if no crash
+		kernel is present.
+User:		Kexec tools, Kdump service
+
+What:		/sys/kernel/kexec_crash_size
+Date:		Dec 2009
+Contact:	kexec at lists.infradead.org
+Description:	read/write
+		Shows the amount of memory reserved for loading the crash
+		(kdump) kernel. It reports the size, in bytes, of the
+		crash kernel area defined by the crashkernel= parameter.
+		This interface also allows reducing the crashkernel
+		reservation by writing a smaller value, and the reclaimed
+		space is added back to the system RAM.
+User:		Kdump service
+
+What:		/sys/kernel/crash_elfcorehdr_size
+Date:		Aug 2023
+Contact:	kexec at lists.infradead.org
+Description:	read only
+		Indicates the preferred size of the memory buffer for the
+		ELF core header used by the crash (kdump) kernel. It defines
+		how much space is needed to hold metadata about the crashed
+		system, including CPU and memory information. This information
+		is used by the user space utility kexec to support updating the
+		in-kernel kdump image during hotplug operations.
+User:		Kexec tools
diff --git a/Documentation/ABI/testing/sysfs-kernel-kexec-kdump b/Documentation/ABI/testing/sysfs-kernel-kexec-kdump
index 320ec75a4903..7e5e528665db 100644
--- a/Documentation/ABI/testing/sysfs-kernel-kexec-kdump
+++ b/Documentation/ABI/testing/sysfs-kernel-kexec-kdump
@@ -1,47 +1,3 @@
-What:		/sys/kernel/kexec_loaded
-Date:		Jun 2006
-Contact:	kexec at lists.infradead.org
-Description:	read only
-		Indicates whether a new kernel image has been loaded
-		into memory using the kexec system call. It shows 1 if
-		a kexec image is present and ready to boot, or 0 if none
-		is loaded.
-User:		kexec tools, kdump service
-
-What:		/sys/kernel/kexec_crash_loaded
-Date:		Jun 2006
-Contact:	kexec at lists.infradead.org
-Description:	read only
-		Indicates whether a crash (kdump) kernel is currently
-		loaded into memory. It shows 1 if a crash kernel has been
-		successfully loaded for panic handling, or 0 if no crash
-		kernel is present.
-User:		Kexec tools, Kdump service
-
-What:		/sys/kernel/kexec_crash_size
-Date:		Dec 2009
-Contact:	kexec at lists.infradead.org
-Description:	read/write
-		Shows the amount of memory reserved for loading the crash
-		(kdump) kernel. It reports the size, in bytes, of the
-		crash kernel area defined by the crashkernel= parameter.
-		This interface also allows reducing the crashkernel
-		reservation by writing a smaller value, and the reclaimed
-		space is added back to the system RAM.
-User:		Kdump service
-
-What:		/sys/kernel/crash_elfcorehdr_size
-Date:		Aug 2023
-Contact:	kexec at lists.infradead.org
-Description:	read only
-		Indicates the preferred size of the memory buffer for the
-		ELF core header used by the crash (kdump) kernel. It defines
-		how much space is needed to hold metadata about the crashed
-		system, including CPU and memory information. This information
-		is used by the user space utility kexec to support updating the
-		in-kernel kdump image during hotplug operations.
-User:		Kexec tools
-
 What:		/sys/kernel/kexec/crash_cma_ranges
 Date:		Nov 2025
 Contact:	kexec at lists.infradead.org
-- 
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