linux-kernel - [PATCH v2 3/5] Documentation/ABI: mark old kexec sysfs deprecated

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Message-ID: <20251106045107.17813-4-sourabhjain@linux.ibm.com>
Date: Thu,  6 Nov 2025 10:21:05 +0530
From: Sourabh Jain <sourabhjain@...ux.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: Sourabh Jain <sourabhjain@...ux.ibm.com>,
        Aditya Gupta <adityag@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, Baoquan he <bhe@...hat.com>,
        Dave Young <dyoung@...hat.com>, Hari Bathini <hbathini@...ux.ibm.com>,
        Jiri Bohac <jbohac@...e.cz>, Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Pingfan Liu <piliu@...hat.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
        Shivang Upadhyay <shivangu@...ux.ibm.com>,
        Vivek Goyal <vgoyal@...hat.com>, linuxppc-dev@...ts.ozlabs.org,
        kexec@...ts.infradead.org
Subject: [PATCH v2 3/5] Documentation/ABI: mark old kexec sysfs deprecated

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@...ux.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Baoquan he <bhe@...hat.com>
Cc: Dave Young <dyoung@...hat.com>
Cc: Hari Bathini <hbathini@...ux.ibm.com>
Cc: Jiri Bohac <jbohac@...e.cz>
Cc: Madhavan Srinivasan <maddy@...ux.ibm.com>
Cc: Mahesh J Salgaonkar <mahesh@...ux.ibm.com>
Cc: Pingfan Liu <piliu@...hat.com>
Cc: Ritesh Harjani (IBM) <ritesh.list@...il.com>
Cc: Shivang Upadhyay <shivangu@...ux.ibm.com>
Cc: Vivek Goyal <vgoyal@...hat.com>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: kexec@...ts.infradead.org
Signed-off-by: Sourabh Jain <sourabhjain@...ux.ibm.com>
---
 .../sysfs-kernel-kexec-kdump                     | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 rename Documentation/ABI/{testing => obsolete}/sysfs-kernel-kexec-kdump (61%)

diff --git a/Documentation/ABI/testing/sysfs-kernel-kexec-kdump b/Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
similarity index 61%
rename from Documentation/ABI/testing/sysfs-kernel-kexec-kdump
rename to Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
index 96b24565b68e..96b4d41721cc 100644
--- a/Documentation/ABI/testing/sysfs-kernel-kexec-kdump
+++ b/Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
@@ -1,3 +1,19 @@
+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@...ts.infradead.org
-- 
2.51.0