[PATCH 4/7] docs: sysfs-block: document stable_writes

[Eric Biggers]

From: Eric Biggers <ebiggers@xxxxxxxxxx>

/sys/block/<disk>/queue/stable_writes is completely undocumented.
Document it.

Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
 Documentation/ABI/testing/sysfs-block | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 94711edc6529d..5d8b187e1ec54 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -515,6 +515,16 @@ Description:
 		scheduler module, if it isn't already present in the system.
 
 
+What:		/sys/block/<disk>/queue/stable_writes
+Date:		September 2020
+Contact:	linux-block@xxxxxxxxxxxxxxx
+Description:
+		[RW] If the device requires that memory must not be modified
+		while it is being written out to disk, this file will contain
+		'1'.  Otherwise it will contain '0'.  This file is writable for
+		testing purposes.
+
+
 What:		/sys/block/<disk>/queue/throttle_sample_time
 Date:		March 2017
 Contact:	linux-block@xxxxxxxxxxxxxxx
-- 
2.34.1