Mike Belopuhov wrote:
> On Thu, Jun 23, 2016 at 12:44 -0400, Ted Unangst wrote:
> > Instead of using the old flags and tsleep style lock, switch to rwlock in
> > sblock. That's what it's for. More legible, and as a bonus, MP safer.
> >
>
> RW_NOSLEEP returns EBUSY if it has to wait, however
> old sblock macro would return EWOULDBLOCK (EAGAIN)
> instead. This error code is returned all the way
> to write system call so you don't want to change
> that.
indeed. i noticed that, but wasn't sure of the implications. i checked a few
callers to see if it was directly handled, but not all the way up.
i should have mentioned it. i've added
if (error == EBUSY)
error = EWOULDBLOCK;
