Various updates for userfaultfd man pages. To summarize the changes: - Correctly / fully describe the two-step feature support handshake process. - Describe new UFFDIO_POISON ioctl. - Other small improvements (missing ioctls, error codes, etc). Axel Rasmussen (10): userfaultfd.2: briefly mention two-step feature handshake process userfaultfd.2: reword to account for new fault resolution ioctls userfaultfd.2: comment on feature detection in the example program ioctl_userfaultfd.2: fix a few trivial mistakes ioctl_userfaultfd.2: describe two-step feature handshake ioctl_userfaultfd.2: describe missing UFFDIO_API feature flags ioctl_userfaultfd.2: correct and update UFFDIO_API ioctl error codes ioctl_userfaultfd.2: clarify the state of the uffdio_api structure on error ioctl_userfaultfd.2: fix / update UFFDIO_REGISTER error code list ioctl_userfaultfd.2: document new UFFDIO_POISON ioctl man2/ioctl_userfaultfd.2 | 254 ++++++++++++++++++++++++++++++++------- man2/userfaultfd.2 | 15 ++- 2 files changed, 220 insertions(+), 49 deletions(-) -- 2.42.0.459.ge4e396fd5e-goog