stm class: Guard output assignment against concurrency

Browse source

It is possible to concurrently assign the same output (a character
device writer or an stm_source device) to different stm devices,
which sets off a strategically placed warning in stm_output_assign().

To avoid this, use a spinlock to serialize (un)assignments between
outputs and stm devices.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Alexander Shishkin 2016-02-15 19:12:06 +02:00 • committed by Greg Kroah-Hartman

parent 1810f2c448

commit cde4ad8368

2 changed files with 18 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

17

drivers/hwtracing/stm/core.c

View file

1

drivers/hwtracing/stm/stm.h

View file