Add some documentation of the prctl(PR_FUTEX_HASH, …) interface.
The PR_FUTEX_HASH interface has been disabled for the final v6.16
release and enabled again for v6.17.

This series updates the merged PR_FUTEX_HASH page and adds
PR_FUTEX_HASH_SET_SLOTS and PR_FUTEX_HASH_GET_SLOTS.

v4…v5: https://lore.kernel.org/all/20250602140104.2769223-1-bigeasy@linutronix.de/
  - Update merged PR_FUTEX_HASH
  - Drop PR_FUTEX_HASH_GET_IMMUTABLE, functionality has been removed.
  - Update SET_SLOTS/ GET_SLOTS based on review.

v3…v4: https://lore.kernel.org/all/20250526155523.1382465-1-bigeasy@linutronix.de/
  - Make FH_FLAG_IMMUTABLE and CONFIG_PROVE_LOCKING bold.
  - Drop one too many "Relative inset"
  - Reword return value for "GET_IMMUTABLE"
  - Reword the description of "unrelated futexes" in PR_FUTEX_HASH

v2…v3: https://lore.kernel.org/all/20250520104247.S-gVcgxM@linutronix.de/
  - Split the individual PR_FUTEX_HASH ops into their own man page.
  - Reword a sentence referring to uaddr in order to link to futex(2).
  - Address remaining review feedback such the semantic new line.

v1…v2: https://lore.kernel.org/all/20250516161422.BqmdlxlF@linutronix.de/
  - Partly reword
  - Use "semantic newlines"

Sebastian Andrzej Siewior (3):
  man/man2const/PR_FUTEX_HASH.2const: Update as of Linux v6.17-rc2
  man/man2/prctl.2, PR_FUTEX_HASH_SET_SLOTS.2const: Document
    PR_FUTEX_HASH_SET_SLOTS
  man/man2/prctl.2, PR_FUTEX_HASH_GET_SLOTS.2const: Document
    PR_FUTEX_HASH_GET_SLOTS

 man/man2const/PR_FUTEX_HASH.2const           |  7 +-
 man/man2const/PR_FUTEX_HASH_GET_SLOTS.2const | 35 ++++++++++
 man/man2const/PR_FUTEX_HASH_SET_SLOTS.2const | 67 ++++++++++++++++++++
 3 files changed, 104 insertions(+), 5 deletions(-)
 create mode 100644 man/man2const/PR_FUTEX_HASH_GET_SLOTS.2const
 create mode 100644 man/man2const/PR_FUTEX_HASH_SET_SLOTS.2const

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2.50.1