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The critical section port already disables interrupts and reads the core id for the whole section, but spinlock_acquire()/spinlock_release() then disabled interrupts again to the same level and re-read the core id register. Add spinlock_acquire_impl()/spinlock_release_impl(), which take a caller-supplied owner id and skip interrupt management, and reuse them from spinlock_acquire()/spinlock_release() to avoid duplicated code. The Xtensa and RISC-V ports now read the core id once and call the impl variants, removing one core id read and one interrupt mask/restore per critical section enter and exit. Closes https://github.com/espressif/esp-idf/issues/18908