From d576a9561a1c80ae593539fb0ce0743d66825ac2 Mon Sep 17 00:00:00 2001 From: Andi Shyti Date: Sat, 22 Aug 2026 14:19:12 +0200 Subject: Merge tag 'rust-i2c-for-7.3' into i2c/i2c i2c: rust: mark I2cAdapter methods as inline A single cleanup for the Rust I2C abstractions, targeting 7.3. `I2cAdapter::get`, `inc_ref`, and `dec_ref` are trivial wrappers around `i2c_get_adapter`/`i2c_put_adapter` and were showing up as their own symbols in the build. Mark them `#[inline]` so they get folded into their callers instead. Signed-off-by: Igor Korotin * tag 'rust-i2c-for-7.3': i2c: rust: mark I2cAdapter methods as inline --- lib/bucket_locks.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 lib/bucket_locks.c (limited to 'lib/bucket_locks.c') diff --git a/lib/bucket_locks.c b/lib/bucket_locks.c new file mode 100644 index 000000000..d29516ca0 --- /dev/null +++ b/lib/bucket_locks.c @@ -0,0 +1,54 @@ +#include +#include +#include +#include +#include + +/* Allocate an array of spinlocks to be accessed by a hash. Two arguments + * indicate the number of elements to allocate in the array. max_size + * gives the maximum number of elements to allocate. cpu_mult gives + * the number of locks per CPU to allocate. The size is rounded up + * to a power of 2 to be suitable as a hash table. + */ + +int __alloc_bucket_spinlocks(spinlock_t **locks, unsigned int *locks_mask, + size_t max_size, unsigned int cpu_mult, gfp_t gfp, + const char *name, struct lock_class_key *key) +{ + spinlock_t *tlocks = NULL; + unsigned int i, size; +#if defined(CONFIG_PROVE_LOCKING) + unsigned int nr_pcpus = 2; +#else + unsigned int nr_pcpus = num_possible_cpus(); +#endif + + if (cpu_mult) { + nr_pcpus = min_t(unsigned int, nr_pcpus, 64UL); + size = min_t(unsigned int, nr_pcpus * cpu_mult, max_size); + } else { + size = max_size; + } + + if (sizeof(spinlock_t) != 0) { + tlocks = kvmalloc_objs(spinlock_t, size, gfp); + if (!tlocks) + return -ENOMEM; + for (i = 0; i < size; i++) { + spin_lock_init(&tlocks[i]); + lockdep_init_map(&tlocks[i].dep_map, name, key, 0); + } + } + + *locks = tlocks; + *locks_mask = size - 1; + + return 0; +} +EXPORT_SYMBOL(__alloc_bucket_spinlocks); + +void free_bucket_spinlocks(spinlock_t *locks) +{ + kvfree(locks); +} +EXPORT_SYMBOL(free_bucket_spinlocks); -- cgit v1.3.1