rio_release_outb_dbell(9)

💅 rio_release_outb_dbell — like, the whole vibe ✨

okay so bestie, we're in the Kernel API Manual today and the star of the show is rio_release_outb_dbell(9) — say that three times fast, i dare you 🫶

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🌸 NAME 🌸

rio_release_outb_dbell — give back an outbound doorbell message range, no cap 🔔

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✨ SYNOPSIS ✨

int rio_release_outb_dbell (struct rio_dev *rdev , struct resource *res
);

like yes that's the whole signature, she's short and she knows it 💅

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🎀 ARGUMENTS 🎀

• rdev — the RIO device you're releasing the doorbell resource from. it's giving "this one, right here" 👑
• res — the doorbell resource that's getting freed. bye bestie, you served 🦋

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💖 DESCRIPTION 💖

so basically this function releases ownership of a doorbell message range. that's it, that's the whole plot 🎬

it returns 0 if the request has been satisfied — so like, zero means slay, we ate, everything worked 🌈✨

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🔥 SEE ALSO 🔥

the kernel file ./drivers/rapidio/rio.c — go read her, she's iconic 📖 and then literally all of these:

• rio_local_get_device_id(9)
• rio_query_mport(9)
• rio_alloc_net(9)
• rio_local_set_device_id(9)
• rio_add_device(9)
• rio_request_inb_mbox(9)
• rio_release_inb_mbox(9)
• rio_request_outb_mbox(9)
• rio_release_outb_mbox(9)
• rio_setup_inb_dbell(9)
• rio_request_inb_dbell(9)
• rio_release_inb_dbell(9)
• rio_request_outb_dbell(9)
• rio_add_mport_pw_handler(9)
• rio_del_mport_pw_handler(9)
• rio_request_inb_pwrite(9)
• rio_release_inb_pwrite(9)
• rio_pw_enable(9)
• rio_map_inb_region(9)
• rio_unmap_inb_region(9)
• rio_map_outb_region(9)
• rio_unmap_outb_region(9)
• rio_mport_get_physefb(9)
• rio_get_comptag(9)
• rio_set_port_lockout(9)
• rio_enable_rx_tx_port(9)
• rio_chk_dev_route(9)
• rio_mport_chk_dev_access(9)
• rio_chk_dev_access(9)
• rio_get_input_status(9)
• rio_clr_err_stopped(9)
• rio_inb_pwrite_handler(9)
• rio_mport_get_efb(9)
• rio_mport_get_feature(9)
• rio_std_route_add_entry(9)
• rio_std_route_get_entry(9)
• rio_std_route_clr_table(9)
• rio_lock_device(9)
• rio_unlock_device(9)
• rio_route_add_entry(9)
• rio_route_get_entry(9)
• rio_route_clr_table(9)
• rio_request_mport_dma(9)
• rio_release_dma(9)
• rio_dma_prep_xfer(9)
• rio_register_scan(9)
• rio_mport_scan(9)

like that's a whole friend group fr fr 😭💀

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and that's the page!! this one lives in ./drivers/rapidio, dated October 2026, and it's filed under rio_release_outb_dbell(9) — go off king 👑✨