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Message-Id: <20250903-slub-percpu-caches-v7-1-71c114cdefef@suse.cz>
Date: Wed, 03 Sep 2025 14:59:43 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Suren Baghdasaryan <surenb@...gle.com>,
"Liam R. Howlett" <Liam.Howlett@...cle.com>,
Christoph Lameter <cl@...two.org>, David Rientjes <rientjes@...gle.com>
Cc: Roman Gushchin <roman.gushchin@...ux.dev>,
Harry Yoo <harry.yoo@...cle.com>, Uladzislau Rezki <urezki@...il.com>,
Sidhartha Kumar <sidhartha.kumar@...cle.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, rcu@...r.kernel.org,
maple-tree@...ts.infradead.org, vbabka@...e.cz,
Alexei Starovoitov <ast@...nel.org>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH v7 01/21] locking/local_lock: Expose dep_map in
local_trylock_t.
From: Alexei Starovoitov <ast@...nel.org>
lockdep_is_held() macro assumes that "struct lockdep_map dep_map;"
is a top level field of any lock that participates in LOCKDEP.
Make it so for local_trylock_t.
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Alexei Starovoitov <ast@...nel.org>
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
include/linux/local_lock_internal.h | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/include/linux/local_lock_internal.h b/include/linux/local_lock_internal.h
index d80b5306a2c0ccf95a3405b6b947b5f1f9a3bd38..949de37700dbc10feafc06d0b52382cf2e00c694 100644
--- a/include/linux/local_lock_internal.h
+++ b/include/linux/local_lock_internal.h
@@ -17,7 +17,10 @@ typedef struct {
/* local_trylock() and local_trylock_irqsave() only work with local_trylock_t */
typedef struct {
- local_lock_t llock;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct lockdep_map dep_map;
+ struct task_struct *owner;
+#endif
u8 acquired;
} local_trylock_t;
@@ -31,7 +34,7 @@ typedef struct {
.owner = NULL,
# define LOCAL_TRYLOCK_DEBUG_INIT(lockname) \
- .llock = { LOCAL_LOCK_DEBUG_INIT((lockname).llock) },
+ LOCAL_LOCK_DEBUG_INIT(lockname)
static inline void local_lock_acquire(local_lock_t *l)
{
@@ -81,7 +84,7 @@ do { \
local_lock_debug_init(lock); \
} while (0)
-#define __local_trylock_init(lock) __local_lock_init(lock.llock)
+#define __local_trylock_init(lock) __local_lock_init((local_lock_t *)lock)
#define __spinlock_nested_bh_init(lock) \
do { \
--
2.51.0
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