fm10k_mbx_head_sub(9)

💅 fm10k_mbx_head_sub(9) — from the Kernel API Manual, bestie ✨

okay so picture this: it's a kernel API manual, it's giving serious business, and I'm here to make it make sense. we're talking about fm10k_mbx_head_sub today and honestly? she's a tiny little math gremlin and I love her for it 🎀

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🌸 NAME 🌸

fm10k_mbx_head_sub — determine the new head value with a subtracted offset. that's the whole vibe. no cap 🫶

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✨ SYNOPSIS ✨

u16 fm10k_mbx_head_sub (struct fm10k_mbx_info *mbx , u16 offset );

like, she takes two things and gives you back a u16. iconic behavior tbh 👑

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💖 ARGUMENTS 💖

• mbx — pointer to mailbox 💌 yes, THE mailbox. the one and only.
• offset — length to add to head offset. that's the number you're handing over, bestie.

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕ — this function grabs the local head index and recomputes it for a given length that's being added as an offset. that's it. that's the function. lowkey elegant, highkey essential. the way that she just... recalculates. periodt 💅

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🔥 SEE ALSO 🔥

the friend group is ENORMOUS, buckle up:

kernel file ./drivers/net/ethernet/intel/fm10k/fm10k_mbx.c, fm10k_fifo_init(9), fm10k_fifo_used(9), fm10k_fifo_unused(9), fm10k_fifo_empty(9), fm10k_fifo_head_offset(9), fm10k_fifo_tail_offset(9), fm10k_fifo_head_len(9), fm10k_fifo_head_drop(9), fm10k_fifo_drop_all(9), fm10k_mbx_index_len(9), fm10k_mbx_tail_add(9), fm10k_mbx_tail_sub(9), fm10k_mbx_head_add(9), fm10k_mbx_pushed_tail_len(9), fm10k_fifo_write_copy(9), fm10k_fifo_enqueue(9), fm10k_mbx_validate_msg_size(9), fm10k_mbx_write_copy(9), fm10k_mbx_pull_head(9), fm10k_mbx_read_copy(9), fm10k_mbx_push_tail(9), fm10k_crc_16b(9), fm10k_fifo_crc(9), fm10k_mbx_update_local_crc(9), fm10k_mbx_verify_remote_crc(9), fm10k_mbx_rx_ready(9), fm10k_mbx_tx_ready(9), fm10k_mbx_tx_complete(9), fm10k_mbx_dequeue_rx(9), fm10k_mbx_enqueue_tx(9), fm10k_mbx_read(9), fm10k_mbx_write(9), fm10k_mbx_create_connect_hdr(9), fm10k_mbx_create_data_hdr(9), fm10k_mbx_create_disconnect_hdr(9), fm10k_mbx_create_fake_disconnect_hdr(9), fm10k_mbx_create_error_msg(9), fm10k_mbx_validate_msg_hdr(9), fm10k_mbx_create_reply(9), fm10k_mbx_reset_work(9), fm10k_mbx_update_max_size(9), fm10k_mbx_connect_reset(9), fm10k_mbx_process_connect(9), fm10k_mbx_process_data(9), fm10k_mbx_process_disconnect(9), fm10k_mbx_process_error(9), fm10k_mbx_process(9), fm10k_mbx_disconnect(9), fm10k_mbx_connect(9), fm10k_mbx_validate_handlers(9), fm10k_mbx_register_handlers(9), fm10k_pfvf_mbx_init(9), fm10k_sm_mbx_create_data_hdr(9), fm10k_sm_mbx_create_connect_hdr(9), fm10k_sm_mbx_connect_reset(9), fm10k_sm_mbx_connect(9), fm10k_sm_mbx_disconnect(9), fm10k_sm_mbx_validate_fifo_hdr(9), fm10k_sm_mbx_process_error(9), fm10k_sm_mbx_create_error_msg(9), fm10k_sm_mbx_receive(9), fm10k_sm_mbx_transmit(9), fm10k_sm_mbx_create_reply(9), fm10k_sm_mbx_process_reset(9), fm10k_sm_mbx_process_version_1(9), fm10k_sm_mbx_process(9), fm10k_sm_mbx_init(9).

like I said. ENORMOUS. she knows everybody at the party 😭💀

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ngl bestie, if you're reading this to understand the fm10k mailbox code, you're already doing amazing. go get that head index. 🌈⭐

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and that's a wrap, babes 🍓 this lil page lives at ./drivers/net/ethernet/intel/f... and it's stamped October 2026 — see you in the next release, mwah 💜🧚