cs_dsp_mock...p_drop_bytes(9)

💅 cs_dsp_mock_regmap_drop_bytes 💅

okay bestie, so this is a page from the Kernel API Manual — yes, the kernel manual, we're being that girl today ✨ — and it's all about cs_dsp_mock_regmap_drop_bytes(9), a function living in ./drivers/firmware/cirrus/test. she's a little helper for throwing bytes out of the cache, and honestly? she ate. let's get into it 🎀

---

✨ NAME ✨

cs_dsp_mock_regmap_drop_bytes — drop a number of bytes from the cache. that's it, that's the whole vibe 💖

---

🌸 SYNOPSIS 🌸

void cs_dsp_mock_regmap_drop_bytes (struct cs_dsp_test *priv , unsigned
       int first_reg , size_t num_bytes );

literally just three args and a void return. she takes, she doesn't give back 🫶 no cap.

---

🦋 ARGUMENTS 🦋

• priv — a pointer to the struct cs_dsp_test object. you know, the whole test setup she's working with 💜
• first_reg — the address of the first register to drop. like, where the dropping starts, bestie 📍
• num_bytes — how many bytes to drop from the cache. but here's the thing, okay — this gets rounded down to a whole number of registers. so any trailing bytes that aren't a multiple of the register size just... won't get dropped. not even a little 💀

and this rounding thing? it's intentional. the manpage says it's "(This is intended to help detect math errors in test code.)" — so like, if your test code is doing cursed math, this is gonna snitch on you. icon behaviour, honestly 👑

---

🔥 SEE ALSO 🔥

• kernel file ./drivers/firmware/cirrus/test/cs_dsp_mock_regmap.c — the source, go read it if you're nosy 💅
• cs_dsp_mock_regmap_drop_range(9)
• cs_dsp_mock_regmap_drop_regs(9)
• cs_dsp_mock_regmap_drop_system_regs(9)
• cs_dsp_mock_regmap_is_dirty(9)
• cs_dsp_mock_regmap_init(9)

the whole friend group, fr fr 🌈

---

that's the whole page, no notes. mwah 💋

sign-off time: source + version vibes come from ./drivers/firmware/cirrus/test, dated October 2026, and the page you're reading is cs_dsp_mock...p_drop_bytes(9) — catch you on the next one, bestie 🌸🦋⭐