NAME
end_request - end I/O on the current segment of the request
SYNOPSIS
void end_request(struct request * req, int uptodate);
ARGUMENTS
req
the request being processed
uptodate
error value or 0/1 uptodate flag
DESCRIPTION
Ends I/O on the current segment of a request. If that is the only remaining segment, the request is also completed and freed.
This is a remnant of how older block drivers handled IO completions. Modern drivers typically end IO on the full request in one go, unless they have a residual value to account for. For that case this function isn´t really useful, unless the residual just happens to be the full current segment. In other words, don´t use this function in new code. Either use end_request_completely, or the end_that_request_chunk (along with end_that_request_last) for partial completions.