devcd_read_from_sgtable(9)

💖 devcd_read_from_sgtable(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this one is literally devcd_read_from_sgtable, and it's the little helper that copies data from an sg_table into a buffer you hand it, then tells you how many bytes it actually read. that's the whole vibe. 🫶

---

✨ SYNOPSIS ✨

ssize_t devcd_read_from_sgtable (char *buffer , loff_t offset , size_t
buf_len , void *data , size_t data_len );

like, that's the signature, no cap. five args, one ssize_t back. 💅

---

🎀 ARGUMENTS 🎀

• buffer — the buffer you're copying the data into. it's the destination, the main character of this operation. 🎯
• offset — start the copy this many bytes from the head of the data in the scatterlist you gave it. so like, skip ahead offset bytes first. ⏩
• buf_len — the length of the buffer. yes, the one you just passed in. 📏
• data — the scatterlist table you're copying from. the source. the origin story. 🌸
• data_len — the length of the data in the sg_table. 📐

---

🔥 RETURN 🔥

the number of bytes copied. that's it, that's the return value — a ssize_t, and it's telling you how much actually made it across. 🧚

ngl, always check it, bestie — it's literally the receipt for your copy. 💀

---

🌈 SEE ALSO 🌈

it's all in the kernel file ./drivers/base/devcoredump.c — go read it, iykwup:

• dev_coredumpv(9)
• devcd_free_sgtable(9)
• dev_coredump_put(9)
• dev_coredumpm_timeout(9)
• dev_coredumpsg(9)

---

and that's the page!! 🎀✨ mwah 💋 — this little gem lives under ./drivers/base in the Kernel API Manual, dated October 2026. obsessed with her, fr fr. 👑💜