Document RWF_ATOMIC flag for pwritev2().

RWF_ATOMIC atomic is used for enabling torn-write protection.

We use RWF_ATOMIC as this is legacy name for similar feature proposed in
the past.

Himanshu Madhani (2):
  statx.2: Document STATX_WRITE_ATOMIC
  readv.2: Document RWF_ATOMIC flag

John Garry (2):
  man2/open.2: Document RWF_ATOMIC
  io_submit.2: Document RWF_ATOMIC

 man2/io_submit.2 |  5 +++++
 man2/open.2      | 13 +++++++++++++
 man2/readv.2     | 45 +++++++++++++++++++++++++++++++++++++++++++++
 man2/statx.2     | 18 ++++++++++++++++++
 4 files changed, 81 insertions(+)

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2.31.1