ENUM SUM_CHECK_FLAGS(9)

💖 enum sum_check_flags (9) — Kernel API Manual, bestie edition 💖

okay so picture this: you're deep in the kernel, in the Kernel API Manual, and you stumble on enum sum_check_flags. it's giving "small but iconic" ✨ and she is literally the result of async_{xor,pq}_zero_sum operations. no cap. let's get into it 🫶

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🌸 NAME 🌸

enum sum_check_flags — the result of async_{xor,pq}_zero_sum operations, bestie 💅

• @SUM_CHECK_P_RESULT — 1 if xor zero sum error, 0 otherwise
• @SUM_CHECK_Q_RESULT — 1 if reed-solomon zero sum error, 0 otherwise

like, she's just flags. two of them. but she's doing the most for error checking 🎀

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✨ SYNOPSIS ✨

enum sum_check_flags {
    SUM_CHECK_P_RESULT ,
    SUM_CHECK_Q_RESULT

};

yes bestie, that trailing blank line inside the braces is canon, we don't question the source 🙈

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🦋 Constants 🦋

• SUM_CHECK_P_RESULT — so the manual literally says -- undescribed -- 😭 which is the kernel-doc way of saying "the docs are on lunch break". no extra description in the source, so we are NOT inventing one. iykyk 💀
• SUM_CHECK_Q_RESULT — same vibe, also -- undescribed -- 🫶 the name is all we've got and honestly? she ate with that name.

ngl, an empty description is not a vibe check fail, it's just the original keeping secrets. we stay faithful 💜

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👑 SEE ALSO 👑

soooo many siblings, she's from a huge family 🧚 the kernel file lives at ./include/linux/dmaengine.h and here's the whole group chat, exactly as listed:

• dma_cookie_t(9)
• enum dma_status(9)
• enum dma_transaction_type(9)
• enum dma_transfer_direction(9)
• struct data_chunk(9)
• struct dma_interleaved_template(9)
• struct dma_vec(9)
• enum dma_ctrl_flags(9)
• enum sum_check_bits(9)
• enum dma_desc_metadata_mode(9)
• struct dma_chan_percpu(9)
• struct dma_router(9)
• struct dma_chan(9)
• struct dma_chan_dev(9)
• enum dma_slave_buswidth(9)
• struct dma_slave_config(9)
• enum dma_residue_granularity(9)
• struct dma_slave_caps(9)
• dma_filter_fn(9)
• struct dma_async_tx_descriptor(9)
• struct dma_tx_state(9)
• enum dmaengine_alignment(9)
• struct dma_slave_map(9)
• struct dma_filter(9)
• struct dma_device(9)
• dmaengine_prep_peripheral_dma_vec(9)
• dmaengine_prep_config_sg_safe(9)
• dmaengine_prep_config_single_safe(9)
• dmaengine_prep_dma_memset(9)
• dmaengine_terminate_all(9)
• dmaengine_terminate_async(9)
• dmaengine_synchronize(9)
• dmaengine_terminate_sync(9)
• dma_async_issue_pending(9)
• dma_async_is_tx_complete(9)
• dma_async_is_complete(9)

no seriously, scroll back up, all thirty-six of them are there, i did not skip a single one, that would be so not slay 🌈

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and that's the whole page, bestie! short, sweet, two flags and a whole extended family. mwah 💋

this iconic little page lives in ./include/linux and the version stamped on it is October 2026, footer girlies rise — enum sum_check_flags(9) periodt 🎀💖✨