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ea21771c07
Since out-of-order unlocks are unsupported for rqspinlock, and irqsave variants enforce strict FIFO ordering anyway, make the same change for normal non-irqsave variants, such that FIFO ordering is enforced. Two new verifier state fields (active_lock_id, active_lock_ptr) are used to denote the top of the stack, and prev_id and prev_ptr are ascertained whenever popping the topmost entry through an unlock. Take special care to make these fields part of the state comparison in refsafe. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20250316040541.108729-25-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>