blk_stat_add_callback(9)

✨ blk_stat_add_callback(9) ✨

okay bestie, we’re in the Kernel API Manual and this one is short but important 🫶

🌸 NAME 🌸

blk_stat_add_callback — add a block statistics callback to be run on a request queue.

✨ SYNOPSIS ✨

void blk_stat_add_callback (struct request_queue *q , struct blk_stat_callback *cb );

🎀 ARGUMENTS 🎀

• q — the request queue. that’s the queue we’re working with 💅
• cb — the callback. the little function guy getting added 🦋

💅 DESCRIPTION 💅

okay so here’s the one major vibe check: a single struct blk_stat_callback can only be added to a single struct request_queue. no cap. that’s the whole note, and it’s lowkey the main character of this page 🔥

🦋 SEE ALSO 🦋

• Kernel file ./block/blk-stat.h struct blk_stat_callback(9), blk_stat_alloc_callback(9), blk_stat_remove_callback(9), blk_stat_free_callback(9), blk_stat_is_active(9), blk_stat_activate_nsecs(9), blk_stat_activate_msecs(9)

mwah 💋 and that’s the page! source/version is ./block, dated October 2026 — iconic, periodt 🌈👑