linux-kernel - [PATCH for-4.16 1/3] sysfs: improve devices-coredump description with user-space perspective

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Date:   Thu, 15 Mar 2018 10:55:23 +0100
From:   Arend van Spriel <aspriel@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Brian Norris <briannorris@...omium.org>,
        Arend van Spriel <aspriel@...il.com>
Subject: [PATCH for-4.16 1/3] sysfs: improve devices-coredump description with user-space perspective

Instead of referring to kernel internals, describe the ABI from user-space
perspective to clarify what can be expected when using it.

Signed-off-by: Arend van Spriel <aspriel@...il.com>
---
 Documentation/ABI/testing/sysfs-devices-coredump | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-devices-coredump b/Documentation/ABI/testing/sysfs-devices-coredump
index e459368..d5a4c75 100644
--- a/Documentation/ABI/testing/sysfs-devices-coredump
+++ b/Documentation/ABI/testing/sysfs-devices-coredump
@@ -2,9 +2,13 @@ What:		/sys/devices/.../coredump
 Date:		December 2017
 Contact:	Arend van Spriel <aspriel@...il.com>
 Description:
-		The /sys/devices/.../coredump attribute is only present when the
-		device is bound to a driver, which provides the .coredump()
-		callback. The attribute is write only. Anything written to this
-		file will trigger the .coredump() callback.
+		When present the /sys/devices/.../coredump attribute can be used
+		to trigger a coredump of the device. The coredump contents are
+		device driver specific and thus vary. The coredump attribute is
+		writeonly. Anything written to this file will trigger creation
+		of the coredump. When the coredump is made available under
+		/sys/class/devcoredump it will generate a uevent. When the
+		coredump can not be successfully generated no ueven will occur.

-		Available when CONFIG_DEV_COREDUMP is enabled.
+		Available when CONFIG_DEV_COREDUMP is enabled and the device
+		driver supports coredump generation.
--
1.9.1