On Wed, Dec 09, 2020 at 04:51:48PM +0100, Stanislaw Gruszka wrote: > On Wed, Dec 09, 2020 at 03:08:26PM +0000, Matthew Wilcox wrote: > > On Wed, Dec 09, 2020 at 03:46:28PM +0100, Stanislaw Gruszka wrote: > > > At this point of release cycle we should probably go with revert, > > > but I think the main problem is that BPF and ERROR_INJECTION use > > > function that is not intended to be used externally. For external users > > > add_to_page_cache_lru() and add_to_page_cache_locked() are exported > > > and I think those should be used (see the patch below). > > > > FWIW, I intend to do some consolidation/renaming in this area. I > > trust that will not be a problem? > > If it does not break anything, it will be not a problem ;-) > > It's possible that __add_to_page_cache_locked() can be a global symbol > with add_to_page_cache_lru() + add_to_page_cache_locked() being just > static/inline wrappers around it.
So what happens to BTF if we change this area entirely? Your IDs sound like some kind of ABI to me, which is extremely scary.
