drm_release(9)

💅 drm_release (kernel API manual, bestie!)

okay so grab your iced coffee because we're talking about drm_release(9) — it's a Kernel API Manual entry and honestly it's a short one, so we can absolutely get through this together 🫶

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✨ NAME ✨

drm_release — the release method for a DRM file, periodt.

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🎀 SYNOPSIS 🎀

int drm_release (struct inode *inode , struct file *filp );

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🌸 ARGUMENTS 🌸

• inode — the device inode. that's it, that's the whole vibe ✨
• filp — the file pointer. yes with the period, the manpage is being cute about it 🙈

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🦋 DESCRIPTION 🦋

okay so listen: drivers must use this function as their file_operations.release method. not optional, not a suggestion, it's the assignment 💅

what does it do? it frees any resources associated with the open file. literally cleaning up the mess, iconic behavior.

and here's the part that matters 🔥 — if this is the last open file for the DRM device, it also restores the active in-kernel DRM client. so like, the final one out turns the lights back on for the in-kernel client. main character energy fr fr 👑

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⭐ RETURN ⭐

it always succeeds and returns 0. no drama, no error codes, just a clean little zero 😌✨

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💖 SEE ALSO 💖

go read these next, iykyk:

• Kernel file ./drivers/gpu/drm/drm_file.c
• file operations(9)
• drm_file_alloc(9)
• drm_file_free(9)
• drm_open(9)
• drm_release_noglobal(9)
• drm_read(9)
• drm_poll(9)
• drm_event_reserve_init_locked(9)
• drm_event_reserve_init(9)
• drm_event_cancel_free(9)
• drm_send_event_timestamp_locked(9)
• drm_send_event_locked(9)
• drm_send_event(9)
• drm_print_memory_stats(9)
• drm_show_memory_stats(9)
• drm_show_fdinfo(9)
• drm_file_err(9)
• mock_drm_getfile(9)

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and that's the whole page bestie, 10/10 no notes 🌈

sign-off time 🎀 this one lives in ./drivers/gpu/drm, it's dated October 2026, and it's page drm_release(9) of the Kernel API Manual. mwah, go free some resources 💜