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Message-ID: <174670043627.406.8429793484565476771.tip-bot2@tip-bot2>
Date: Thu, 08 May 2025 10:33:56 -0000
From: "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Peter Zijlstra (Intel)" <peterz@...radead.org>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: locking/futex] futex: Create private_hash() get/put class
The following commit has been merged into the locking/futex branch of tip:
Commit-ID: d854e4e7850e6d3ed24f863a877abc2279d60506
Gitweb: https://git.kernel.org/tip/d854e4e7850e6d3ed24f863a877abc2279d60506
Author: Peter Zijlstra <peterz@...radead.org>
AuthorDate: Wed, 16 Apr 2025 18:29:07 +02:00
Committer: Peter Zijlstra <peterz@...radead.org>
CommitterDate: Sat, 03 May 2025 12:02:06 +02:00
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@...radead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20250416162921.513656-8-bigeasy@linutronix.de
---
kernel/futex/core.c | 12 ++++++++++++
kernel/futex/futex.h | 8 ++++++++
2 files changed, 20 insertions(+)
diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 56a5653..6a1d6b1 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 77d9b35..bc76e36 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
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