Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
+20
+12
kernel/futex/core.c
+12
kernel/futex/core.c
···
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#endif /* CONFIG_FAIL_FUTEX */
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struct futex_private_hash *futex_private_hash(void)
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{
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return NULL;
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}
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bool futex_private_hash_get(struct futex_private_hash *fph)
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{
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return false;
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}
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void futex_private_hash_put(struct futex_private_hash *fph) { }
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/**
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* futex_hash - Return the hash bucket in the global hash
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* @key: Pointer to the futex key for which the hash is calculated
+8
kernel/futex/futex.h
+8
kernel/futex/futex.h
···
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extern void futex_hash_get(struct futex_hash_bucket *hb);
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extern void futex_hash_put(struct futex_hash_bucket *hb);
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extern struct futex_private_hash *futex_private_hash(void);
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extern bool futex_private_hash_get(struct futex_private_hash *fph);
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extern void futex_private_hash_put(struct futex_private_hash *fph);
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DEFINE_CLASS(hb, struct futex_hash_bucket *,
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if (_T) futex_hash_put(_T),
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futex_hash(key), union futex_key *key);
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+
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DEFINE_CLASS(private_hash, struct futex_private_hash *,
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if (_T) futex_private_hash_put(_T),
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futex_private_hash(), void);
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/**
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* futex_match - Check whether two futex keys are equal