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5c2e7736e2
When PREEMPT_RT=y, spin locks are mapped to rt_mutex types, so using
spinlock_check() + __raw_spin_lock_init() to initialize spin locks is
incorrect, and would cause build errors.
Introduce __spin_lock_init() to initialize a spin lock with lockdep
rquired information for PREEMPT_RT builds, and use it in the Rust
helper.
Fixes: d2d6422f8b ("x86: Allow to enable PREEMPT_RT.")
Closes: https://lore.kernel.org/oe-kbuild-all/202409251238.vetlgXE9-lkp@intel.com/
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Eder Zulian <ezulian@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Tested-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20241107163223.2092690-2-ezulian@redhat.com
29 lines
672 B
C
29 lines
672 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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# if defined(CONFIG_PREEMPT_RT)
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__spin_lock_init(lock, name, key, false);
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# else /*!CONFIG_PREEMPT_RT */
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__raw_spin_lock_init(spinlock_check(lock), name, key, LD_WAIT_CONFIG);
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# endif /* CONFIG_PREEMPT_RT */
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#else /* !CONFIG_DEBUG_SPINLOCK */
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spin_lock_init(lock);
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#endif /* CONFIG_DEBUG_SPINLOCK */
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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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