CVS commit: src/sys/dev/usb

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Mon Nov 30 00:48:35 UTC 2020

Modified Files:
        src/sys/dev/usb: uhid.c

Log Message:
uhid(4): Omit needless softint indirection.

USB xfer callbacks already run in softint context at IPL_SOFTSERIAL,
and I see no reason why the call to psignal must happen instead at
the lower priority of IPL_SOFTCLOCK, so let's avoid using up the
scarce resource of softints for something that doesn't need 'em.

While here, use atomic_store_relaxed to update sc->sc_async and
atomic_load_relaxed to optimisitcally test it without acquiring
proc_lock.


To generate a diff of this commit:
cvs rdiff -u -r1.115 -r1.116 src/sys/dev/usb/uhid.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.