I've compiled a 8.14 through 8.21 with and without staging patches and narrowed down to 8.16 with staging as triggering my app crash.
Additionally I've -W eventfd_synchronization on 8.16, the build runs the app normally.
That patch folder has about 50 diffs in it.
I've tried manually deleting the patch file items in my Fedora rpm package .spec, but then I get complaints of missing patch files, when patch apply is run.
How can I apply all the other patch series, and then say only first half within the above, to further narrow down to a particular patch ?