The following is a quick stab at avoiding a hideous work around we are currently using in IIO. In some cases we have entire attribute groups that are created from descriptions an array of struct iio_chan_spec. To keep the reference counts sane and cause subdirectories to be created we are currently using dummy groups and dummy attribute arrays (provided once in the core). This series is an initial probably stupid approach to avoiding this. Greg has expressed some doubts about whether subdirectories are ever a good idea, but the problem occurs for the top level directory as well (handled by patch 1). Note, all attributes are created at probe time. Ultimately we are just respinning the create_group code to allow us to create the attributes from a device description rather than statically allocating them in each driver (results in a massive reduction in repeated code). All opinions welcomed. (this is definitely an rfc, the code isn't even tested yet) Jonathan p.s. Greg, sorry for pestering about this! Jonathan Cameron (2): sysfs: Allow for null group pointer in create_group sysfs: Allow for groups with no attributes - grp->attrs = NULL. fs/sysfs/group.c | 28 +++++++++++++++++----------- 1 files changed, 17 insertions(+), 11 deletions(-) -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
