futex: Remove {get,drop}_futex_key_refs()

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Now that {get,drop}_futex_key_refs() have become a glorified NOP,
remove them entirely.

The only thing get_futex_key_refs() is still doing is an smp_mb(), and
now that we don't need to (ab)use existing atomic ops to obtain them,
we can place it explicitly where we need it.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

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Peter Zijlstra 2020-03-04 13:24:24 +01:00

parent 222993395e

commit 4b39f99c22

1 changed files with 6 additions and 84 deletions

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kernel/futex.c

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