On Tue, May 14, 2024 at 6:12 AM Huichun Feng <foxhoundsk.tw@xxxxxxxxx> wrote: > > In legacy sysfs GPIO, when using poll(2) on the sysfs GPIO value for > state change awaiting, a subsequent read(2) is required for consuming > the event, which the doc recommends the use of lseek(2) or > close-and-reopen to reset the file offset afterwards. > > The recommendations however, require at least 2 syscalls to consume > the event. Gladly, use of pread(2) require only 1 syscall for the > consumption. Let's advertise this usage by prioritizing its placement. > > Signed-off-by: Huichun Feng <foxhoundsk.tw@xxxxxxxxx> > --- This doesn't apply on top of gpio/for-next, please rebase and resend. Bart
