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Subject[PATCH v3 3/4] Documentation/ABI: mark /sys/kernel/fadump_* sysfs files deprecated
Date
The /sys/kernel/fadump_* sysfs files are replicated under
/sys/kernel/fadump/ directory. But we need to keep the old
sysfs files to maintain the backward compatibility.

The sysfs files are scheduled to remove by 2021.

Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
---
.../sysfs-kernel-fadump_enabled | 3 +++
.../sysfs-kernel-fadump_registered | 3 +++
.../sysfs-kernel-fadump_release_mem | 3 +++
.../sysfs-kernel-fadump_release_opalcore | 2 ++
Documentation/powerpc/firmware-assisted-dump.rst | 15 +++++++++++++--
5 files changed, 24 insertions(+), 2 deletions(-)
rename Documentation/ABI/{testing => obsolete}/sysfs-kernel-fadump_enabled (67%)
rename Documentation/ABI/{testing => obsolete}/sysfs-kernel-fadump_registered (72%)
rename Documentation/ABI/{testing => obsolete}/sysfs-kernel-fadump_release_mem (74%)
rename Documentation/ABI/{testing => removed}/sysfs-kernel-fadump_release_opalcore (82%)

diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_enabled b/Documentation/ABI/obsolete/sysfs-kernel-fadump_enabled
similarity index 67%
rename from Documentation/ABI/testing/sysfs-kernel-fadump_enabled
rename to Documentation/ABI/obsolete/sysfs-kernel-fadump_enabled
index f73632b1c006..96f49f979e9c 100644
--- a/Documentation/ABI/testing/sysfs-kernel-fadump_enabled
+++ b/Documentation/ABI/obsolete/sysfs-kernel-fadump_enabled
@@ -1,3 +1,6 @@
+This ABI is deprecated and will be removed after 2021. It is replaced
+with /sys/kernel/fadump/enabled.
+
What: /sys/kernel/fadump_enabled
Date: Feb 2012
Contact: linuxppc-dev@lists.ozlabs.org
diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_registered b/Documentation/ABI/obsolete/sysfs-kernel-fadump_registered
similarity index 72%
rename from Documentation/ABI/testing/sysfs-kernel-fadump_registered
rename to Documentation/ABI/obsolete/sysfs-kernel-fadump_registered
index dcf925e53f0f..11ab41c673de 100644
--- a/Documentation/ABI/testing/sysfs-kernel-fadump_registered
+++ b/Documentation/ABI/obsolete/sysfs-kernel-fadump_registered
@@ -1,3 +1,6 @@
+This ABI is deprecated and will be removed after 2021. It is replaced
+with /sys/kernel/fadump/registered.
+
What: /sys/kernel/fadump_registered
Date: Feb 2012
Contact: linuxppc-dev@lists.ozlabs.org
diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_release_mem b/Documentation/ABI/obsolete/sysfs-kernel-fadump_release_mem
similarity index 74%
rename from Documentation/ABI/testing/sysfs-kernel-fadump_release_mem
rename to Documentation/ABI/obsolete/sysfs-kernel-fadump_release_mem
index 9c20d64ab48d..69308b28cb0d 100644
--- a/Documentation/ABI/testing/sysfs-kernel-fadump_release_mem
+++ b/Documentation/ABI/obsolete/sysfs-kernel-fadump_release_mem
@@ -1,3 +1,6 @@
+This ABI is deprecated and will be removed after 2021. It is replaced
+with /sys/kernel/fadump/release_mem.
+
What: /sys/kernel/fadump_release_mem
Date: Feb 2012
Contact: linuxppc-dev@lists.ozlabs.org
diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore b/Documentation/ABI/removed/sysfs-kernel-fadump_release_opalcore
similarity index 82%
rename from Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore
rename to Documentation/ABI/removed/sysfs-kernel-fadump_release_opalcore
index 53313c1d4e7a..fe42956a3f41 100644
--- a/Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore
+++ b/Documentation/ABI/removed/sysfs-kernel-fadump_release_opalcore
@@ -1,3 +1,5 @@
+This ABI is moved to /sys/kernel/fadump/release_opalcore.
+
What: /sys/kernel/fadump_release_opalcore
Date: Sep 2019
Contact: linuxppc-dev@lists.ozlabs.org
diff --git a/Documentation/powerpc/firmware-assisted-dump.rst b/Documentation/powerpc/firmware-assisted-dump.rst
index 0455a78486d5..fc7b06408cea 100644
--- a/Documentation/powerpc/firmware-assisted-dump.rst
+++ b/Documentation/powerpc/firmware-assisted-dump.rst
@@ -283,14 +283,25 @@ Here is the list of files under kernel sysfs:
enhanced to use this interface to release the memory reserved for
dump and continue without 2nd reboot.

- /sys/kernel/fadump_release_opalcore
+Note: /sys/kernel/fadump_release_opalcore sysfs has moved to
+ /sys/kernel/fadump/release_opalcore.
+
+ /sys/kernel/fadump/release_opalcore

This file is available only on OPAL based machines when FADump is
active during capture kernel. This is used to release the memory
used by the kernel to export /sys/firmware/opal/core file. To
release this memory, echo '1' to it:

- echo 1 > /sys/kernel/fadump_release_opalcore
+ echo 1 > /sys/kernel/fadump/release_opalcore
+
+Note: The following FADump sysfs files are deprecated.
+
+ Deprecated Alternative
+ --------------------------------------------------------------------
+ /sys/kernel/fadump_enabled /sys/kernel/fadump/enabled
+ /sys/kernel/fadump_registered /sys/kernel/fadump/registered
+ /sys/kernel/fadump_release_mem /sys/kernel/fadump/release_mem

Here is the list of files under powerpc debugfs:
(Assuming debugfs is mounted on /sys/kernel/debug directory.)
--
2.17.2
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