bfq_stat_add(9)

💅 NAME 💅

okay bestie, welcome to the bfq_stat_add(9) page — yes, that's the Kernel API Manual energy, and we are about to make one tiny kernel function feel iconic. This one is literally bfq_stat_add — it adds a value to a bfq_stat. periodt. 🫶

✨ SYNOPSIS ✨

void bfq_stat_add (struct bfq_stat *stat , uint64_t val );

No cap, that's the whole signature — keep it exactly like that. 💖

🎀 ARGUMENTS 🎀

• stat — the target bfq_stat, aka the counter bestie we're adding to. 🎯
• val — the value to add. that's it, that's the number. ✨

🌸 DESCRIPTION 🌸

So basically: add val to stat. Simple, cute, to the point. 💅

⚠️ important caveat, bestie: the caller must ensure that IRQ on the same CPU don't re-enter this function for the same counter. like, same CPU + same counter = do not let those IRQ re-enter, fr fr. 🙈

🔥 SEE ALSO 🔥

The kernel file is ./block/bfq-cgroup.c — iconic source location, slay. 💜

All the linked besties, in order:

• bfq_stat_read(9)
• bfq_stat_reset(9)
• bfq_stat_add_aux(9)
• blkg_prfill_stat(9)
• bfq_bfqq_move(9)
• __bfq_bic_change_cgroup(9)
• bfq_flush_idle_tree(9)
• bfq_reparent_leaf_entity(9)
• bfq_reparent_active_queues(9)
• bfq_pd_offline(9)

mwah 💋 — source/version ./block, dated October 2026, and the page is bfq_stat_add(9). okay bye bestie! 🦋