Manual Pages  — BUS_DESCRIBE_INTR

The bus_describe_intr() function is a simple wrapper around BUS_DESCRIBE_INTR(). As a convenience, bus_describe_intr() allows the caller to use printf(9) style formatting to build the description string using fmt.

When an interrupt handler is established by BUS_SETUP_INTR(9), the handler is named after the device the handler is established for. This name is then used in various places such as interrupt statistics displayed by systat(1) and vmstat(8). For devices that use a single interrupt, the device name is sufficiently unique to identify the interrupt handler. However, for devices that use multiple interrupts it can be useful to distinguish the interrupt handlers. When a description is set for an active interrupt handler, a colon followed by the description is appended to the device name to form the interrupt handler name.