The channel-measurement facility

struct cmbdata - channel measurement block data for user space
enable_cmf - switch on the channel measurement for a specific device
disable_cmf - switch off the channel measurement for a specific device
cmf_read - read one value from the current channel measurement block
cmf_readall - read the current channel measurement block

The channel-measurement facility provides a means to collect measurement data which is made available by the channel subsystem for each channel attached device.