From: Daniel Walker <danielwa@cisco.com>
To: "xe-kernel@external.cisco.com" <xe-kernel@external.cisco.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jean Delvare <khali@linux-fr.org>,
Guenter Roeck <linux@roeck-us.net>,
lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org
Subject: unstable /sys interface from hmon
Date: Mon, 30 Jan 2017 12:37:14 -0800 [thread overview]
Message-ID: <99aae36e-ddfd-dcd2-e544-9c28ae373959@cisco.com> (raw)
Hi,
Cisco recently upgraded to kernel 4.4.. We have applications which use the /sys interfaces for some hmon drivers.
We found that the following patches,
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bab2243ce1897865e31ea6d59b0478391f51812b
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c3b7cddc70075d525db6b3068d8b2b9158eedc84
Altered the interface as seen from userspace. These patches changed the paths in the following way,
Before,
/sys/bus/i2c/devices/14-0050/
After,
/sys/bus/i2c/devices/14-0050/hwmon/hwmon7
My impression was that /sys was suppose to be stable, and debugfs was unstable. I'm not sure what the current guidelines are
for this, but we would request that hmon drivers maintain a stable interface from /sys. This change has cause upgrade issues
for us which we would like to avoid in the future.
A patch to add in a compatibility layer would be welcome.
Daniel
next reply other threads:[~2017-01-30 20:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-30 20:37 Daniel Walker [this message]
2017-01-30 23:11 ` unstable /sys interface from hmon Guenter Roeck
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