On Fri, 24 Apr 2020 02:14:20 +0000 Luis Chamberlain wrote: > On Thu, Apr 23, 2020 at 06:05:44PM -0700, Jakub Kicinski wrote: > > On Thu, 23 Apr 2020 20:31:40 +0000 Luis R. Rodriguez wrote: > > > From: Luis Chamberlain <mcgrof@xxxxxxxxxx> > > > > > > Christoph's recent patch "firmware_loader: remove unused exports", which > > > is not merged upstream yet, removed two exported symbols. One is fine to > > > remove since only built-in code uses it but the other is incorrect. > > > > > > If CONFIG_FW_LOADER=m so the firmware_loader is modular but > > > CONFIG_FW_LOADER_USER_HELPER=y we fail at mostpost with: > > > > > > ERROR: modpost: "fw_fallback_config" [drivers/base/firmware_loader/firmware_class.ko] undefined! > > > > > > This happens because the variable fw_fallback_config is built into the > > > kernel if CONFIG_FW_LOADER_USER_HELPER=y always, so we need to grant > > > access to the firmware loader module by exporting it. > > > > > > Instead of just exporting it as we used to, take advantage of the new > > > kernel symbol namespacing functionality, and export the symbol only to > > > the firmware loader private namespace. This would prevent misuses from > > > other drivers and makes it clear the goal is to keep this private to > > > the firmware loader alone. > > > > > > Cc: Christoph Hellwig <hch@xxxxxx> > > > Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> > > > Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> > > > Fixes: "firmware_loader: remove unused exports" > > > > Can't help but notice this strange form of the Fixes tag, is it > > intentional? > > Yeah, no there is no commit for the patch as the commit is ephemeral in > a development tree not yet upstream, ie, not on Linus' tree yet. Using a > commit here then makes no sense unless one wants to use a reference > development tree in this case, as development trees are expected to > rebase to move closer towards Linus' tree. When a tree rebases, the > commit IDs change, and this is why the commit is ephemeral unless > one uses a base tree / branch / tag. I'd think that either the commit is rebase-able and the fix can be squashed into it, or it's not and it has a stable commit id. But I guess it may get tricky around the edges..
