diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2025-04-16 18:29:07 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-05-03 12:02:06 +0200 |
| commit | d854e4e7850e6d3ed24f863a877abc2279d60506 (patch) | |
| tree | 271d3b78dcdb2ffb2113c1a32b9a36f18aa9a7e0 | |
| parent | 6c67f8d880c0950215b8e6f8539562ad1971a05a (diff) | |
futex: Create private_hash() get/put class
This gets us:
fph = futex_private_hash(key) /* gets fph and inc users */
futex_private_hash_get(fph) /* inc users */
futex_private_hash_put(fph) /* dec users */
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250416162921.513656-8-bigeasy@linutronix.de
| -rw-r--r-- | kernel/futex/core.c | 12 | ||||
| -rw-r--r-- | kernel/futex/futex.h | 8 |
2 files changed, 20 insertions, 0 deletions
diff --git a/kernel/futex/core.c b/kernel/futex/core.c index 56a5653e450c..6a1d6b14277f 100644 --- a/kernel/futex/core.c +++ b/kernel/futex/core.c @@ -107,6 +107,18 @@ late_initcall(fail_futex_debugfs); #endif /* CONFIG_FAIL_FUTEX */ +struct futex_private_hash *futex_private_hash(void) +{ + return NULL; +} + +bool futex_private_hash_get(struct futex_private_hash *fph) +{ + return false; +} + +void futex_private_hash_put(struct futex_private_hash *fph) { } + /** * futex_hash - Return the hash bucket in the global hash * @key: Pointer to the futex key for which the hash is calculated diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h index 77d9b3509f75..bc76e366f9a7 100644 --- a/kernel/futex/futex.h +++ b/kernel/futex/futex.h @@ -206,10 +206,18 @@ extern struct futex_hash_bucket *futex_hash(union futex_key *key); extern void futex_hash_get(struct futex_hash_bucket *hb); extern void futex_hash_put(struct futex_hash_bucket *hb); +extern struct futex_private_hash *futex_private_hash(void); +extern bool futex_private_hash_get(struct futex_private_hash *fph); +extern void futex_private_hash_put(struct futex_private_hash *fph); + DEFINE_CLASS(hb, struct futex_hash_bucket *, if (_T) futex_hash_put(_T), futex_hash(key), union futex_key *key); +DEFINE_CLASS(private_hash, struct futex_private_hash *, + if (_T) futex_private_hash_put(_T), + futex_private_hash(), void); + /** * futex_match - Check whether two futex keys are equal * @key1: Pointer to key1 |