On 2/22/19 4:42 PM, Eric Sandeen wrote: > On 2/22/19 3:07 PM, Qian Cai wrote: >> Reverted the commit 75374d062756 ("fs: add an iopoll method to struct >> file_operations") fixed the problem. Christoph mentioned that the field can be >> calculated by the offset (40 bytes). > > I'm a little confused, you can't revert just that patch, right, because others > in the iopoll series depend on it. Is the above commit really the culprit, or do > you mean you backed out the whole series? No, I can revert that single commit on the top of linux-next (next-20190222) just fine.