On Wed, Apr 20, 2022 at 01:54:19PM -0600, Logan Gunthorpe wrote:

prepare_to_wait() can be reasonably called after schedule instead of
setting a flag and preparing in the next loop iteration.

This means that prepare_to_wait() will be called before
read_seqcount_begin(), but there shouldn't be any reason that
the order matters here. On the first iteration of the loop
prepare_to_wait() is already called first.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>