Eric Blake <ebl...@redhat.com> writes: > On 07/11/2017 11:37 AM, Manos Pitsidianakis wrote: >> This function is not used anywhere, so remove it. >> > > Might be interesting to figure out when it WAS last used.
Yes. When I see "remove X because it's unused" during patch review, I immediately ask "why is it unused now, and what was it used for previously?" Ideally, the commit message answers these questions preemptively. > If I grepped > correctly, it was commit 21fcf360 back in May 2012? Yes. "fdc: simplify media change handling". I suspect that commit broke media change for passed-through host floppy. Its only implementation went away in commit f709623 "block: Remove host floppy support". Suggest block: bdrv_media_changed() is unused, remove The i82078 floppy device model used to call bdrv_media_changed() to implement its media change bit when backed by a host floppy. This went away in 21fcf36 "fdc: simplify media change handling". Probably broke host floppy media change. Host floppy pass-through was dropped in commit f709623. bdrv_media_changed() has never been used for anything else. Remove it.