I went through sched.7 and tried to update the real-time bits.
This is an update vs the last posting.

v1…v2 https://lore.kernel.org/all/20250829160200.756194-1-bigeasy@linutronix.de/
  - dropped #4 "man/man2/futex.2: Add a pointer to Linux'
    memory-barrier". According to Carlos it is not entirely this and I am
    not sure what else is meant. So dropping.
  - Updating the link formatting in sched.7 as per G. Branden Robinson.
  - Updating the link in a comment in futex.2 to the one Carlos O'Donell
    suggested which should be right one.
  - Added a note to pthread_cond_init.3 regarding real-time.
  Independently 

Sebastian Andrzej Siewior (5):
  man/man2/prctl.2, PR_FUTEX_HASH_SET_SLOTS.2const: Document
    PR_FUTEX_HASH_SET_SLOTS
  man/man7/sched.7: Update the real-time section
  man/man7/sched.7: Update the documentation references
  man/man2/futex.2: Update the link reference again.
  man/man3/pthread_cond_init.3: Add a note regarding real-time usage

 man/man2/futex.2                             |  2 +-
 man/man2const/PR_FUTEX_HASH_SET_SLOTS.2const | 67 ++++++++++++++++++++
 man/man3/pthread_cond_init.3                 | 21 ++++++
 man/man7/sched.7                             | 67 +++++++++++++-------
 4 files changed, 133 insertions(+), 24 deletions(-)
 create mode 100644 man/man2const/PR_FUTEX_HASH_SET_SLOTS.2const

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2.51.0