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    SubjectRe: [RFC PATCH v5 1/3] printk-rb: new printk ringbuffer implementation (writer)
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    On 2019-12-09, Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> wrote:
    >> +#define _DATA_SIZE(sz_bits) (1UL << (sz_bits))
    >> +#define _DESCS_COUNT(ct_bits) (1U << (ct_bits))
    >> +#define DESC_SV_BITS (sizeof(int) * 8)
    >> +#define DESC_COMMITTED_MASK (1U << (DESC_SV_BITS - 1))
    >
    > What does SV state for? State Value?

    Yes. Originally this thing was just called the state. But it was a bit
    confusing in the code because there is also an enum desc_state (used for
    state queries), which is _not_ the value that is stored in the state
    variable. That's why the code is using state_var/state_val (SV) for the
    actual data values, keeping it separate from desc_state/d_state for the
    the state queries.

    John Ogness

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