async_xor_val_offs(9)

💅 async_xor_val_offs(9) — Kernel API Manual, but make it cute 💅

okay so welcome to the Kernel API Manual page for async_xor_val_offs(9). The mission? Attempt a xor parity check with a dma engine. That's the vibe, bestie. ✨

🌸 NAME 🌸

async_xor_val_offs — attempt a xor parity check with a dma engine. That's the whole assignment, no cap. 💖

✨ SYNOPSIS ✨

struct dma_async_tx_descriptor * async_xor_val_offs (struct page *dest ,
unsigned int offset , struct page **src_list , unsigned int *src_offs ,
int src_cnt , size_t len , enum sum_check_flags *result , struct
async_submit_ctl *submit );

🎀 ARGUMENTS 🎀

• dest — destination page used if the xor is performed synchronously. 🫶
• offset — des offset in pages to start transaction. Yes, the page says "des" — we're keeping it exactly as-is, iykyk. 💅
• src_list — array of source pages.
• src_offs — array of source pages offset; NULL means common src/det offset. That's "src/det" exactly, bestie. 🧚
• src_cnt — number of source pages.
• len — length in bytes.
• result — 0 if sum == 0 else non-zero. Iconic little conditional. 🌈
• submit — submission / completion modifiers.

🦋 DESCRIPTION 🦋

Honored flags: ASYNC_TX_ACK. That's the one that gets the crown. 👑

src_list note, bestie: if the dest is also a source it must be at index zero. The contents of this array will be overwritten if a scribble region is not specified. 👀

🔥 SEE ALSO 🔥

Kernel file ./crypto/async_tx/async_xor.c, plus async_xor_offs(9) and async_xor(9). Go read those next, they're in the same friend group. 💜

Signed off from ./crypto/async_tx, October 2026 edition — mwah 💋✨