c5a445b1e9
On systems with multiple timestamp event channels, some readers might want to receive only a subset of those channels. Add the necessary modifications to support timestamp event channel filtering, including two IOCTL operations: - Clear all channels - Enable one channel The mask modification operations will be applied exclusively on the event queue assigned to the file descriptor used on the IOCTL operation, so the typical procedure to have a reader receiving only a subset of the enabled channels would be: - Open device file - ioctl: clear all channels - ioctl: enable one channel - start reading Calling the enable one channel ioctl more than once will result in multiple enabled channels. Signed-off-by: Xabier Marquiegui <reibax@gmail.com> Suggested-by: Richard Cochran <richardcochran@gmail.com> Suggested-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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