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f4c2c90bb7
Add a non-blocking trylock method to lock backend interface, mutex and spinlock implementations. It includes a C helper for spin_trylock. Rust Binder will use this method together with the new shrinker abstractions to avoid deadlocks in the memory shrinker. Link: https://lore.kernel.org/all/20240912-shrinker-v1-1-18b7f1253553@google.com Signed-off-by: Filipe Xavier <felipe_life@live.com> Reviewed-by: Fiona Behrens <me@kloenk.dev> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Link: https://lore.kernel.org/r/BL0PR02MB4914579914884B5D7473B3D6E96A2@BL0PR02MB4914.namprd02.prod.outlook.com [ Slightly reworded. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
30 lines
557 B
C
30 lines
557 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/export.h>
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#include <linux/spinlock.h>
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void rust_helper___spin_lock_init(spinlock_t *lock, const char *name,
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struct lock_class_key *key)
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{
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#ifdef CONFIG_DEBUG_SPINLOCK
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__raw_spin_lock_init(spinlock_check(lock), name, key, LD_WAIT_CONFIG);
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#else
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spin_lock_init(lock);
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#endif
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}
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void rust_helper_spin_lock(spinlock_t *lock)
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{
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spin_lock(lock);
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}
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void rust_helper_spin_unlock(spinlock_t *lock)
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{
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spin_unlock(lock);
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}
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int rust_helper_spin_trylock(spinlock_t *lock)
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{
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return spin_trylock(lock);
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}
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