__dev_uc_sync(9)

💅 __dev_uc_sync(9) — the Kernel API Manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual, and it's all about __dev_uc_sync — yes that's a double-underscore, do not @ me, that's just how the kernel names its private little functions ✨

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🌸 NAME 🌸

__dev_uc_sync — Synchronize device's unicast list 💖

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✨ SYNOPSIS ✨

int __dev_uc_sync (struct net_device *dev , int (*sync)(struct
       net_device *, const unsigned char *) , int (*unsync)(struct net_device
       *, const unsigned char *) );

like, look at her. three arguments. two of them are function pointers. she's that girl 🔥

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🫶 ARGUMENTS 🫶

• dev — the device to sync. this is the main character, everything happens to her 💅
• sync — the function to call if an address should be added. this is the "add it, slay" callback ✨
• unsync — the function to call if an address should be removed. the "okay bye, blocked" callback 🙈

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🦋 DESCRIPTION 🦋

so what does it actually do? it adds newly added addresses to the interface, and releases addresses that have been deleted. that's it. that's the whole vibe check 💖

new addresses in, stale addresses out. she's literally a bouncer at the club and she is so good at her job 👑

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🌈 SEE ALSO 🌈

all of these live in the kernel file ./include/linux/netdevice.h, and honestly? the friend group is huge. grab a snack 🍓

• struct gro_node(9)
• napi_is_scheduled(9)
• napi_schedule(9)
• napi_schedule_irqoff(9)
• napi_complete_done(9)
• napi_synchronize(9)
• napi_if_scheduled_mark_missed(9)
• enum netdev_priv_flags(9)
• struct net_device(9)
• netdev_priv(9)
• netdev_from_priv(9)
• netif_napi_add(9)
• netif_napi_add_config(9)
• netif_napi_add_tx(9)
• __netif_napi_del(9)
• netif_napi_del(9)
• netif_start_queue(9)
• netif_wake_queue(9)
• netif_stop_queue(9)
• netif_queue_stopped(9)
• netdev_queue_set_dql_min_limit(9)
• netdev_txq_bql_enqueue_prefetchw(9)
• netdev_txq_bql_complete_prefetchw(9)
• netdev_tx_sent_queue(9)
• netdev_sent_queue(9)
• netdev_tx_completed_queue(9)
• netdev_completed_queue(9)
• netdev_tx_reset_subqueue(9)
• netdev_reset_queue(9)
• netdev_cap_txqueue(9)
• netif_running(9)
• netif_start_subqueue(9)
• netif_stop_subqueue(9)
• __netif_subqueue_stopped(9)
• netif_subqueue_stopped(9)
• netif_wake_subqueue(9)
• netif_attr_test_mask(9)
• netif_attr_test_online(9)
• netif_attrmask_next(9)
• netif_attrmask_next_and(9)
• netif_is_multiqueue(9)
• dev_hold(9)
• dev_put(9)
• linkwatch_sync_dev(9)
• netif_carrier_ok(9)
• netif_dormant_on(9)
• netif_dormant_off(9)
• netif_dormant(9)
• netif_testing_on(9)
• netif_testing_off(9)
• netif_testing(9)
• netif_oper_up(9)
• netif_device_present(9)
• netif_tx_lock(9)
• __dev_uc_unsync(9)
• __dev_mc_sync(9)
• __dev_mc_unsync(9)

like… fifty-something entries. no cap, the whole roster 👑💀

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okay and for the sign-off 🫶 this page ships from ./include/linux and it's dated October 2026 — so yeah, she's from the future, we love a forward-thinking icon ✨💜 bye bestie!! 🦋🌸