tee_shm_get_from_id(9)

💖 tee_shm_get_from_id(9) 💖

okay so bestie, we're in the Kernel API Manual today and this one is genuinely such a cute little lookup function. no cap, it's short but it matters. let's get into it 🫶

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✨ NAME ✨

tee_shm_get_from_id — find a shared memory object and bump its reference count 💅

like, you give it an id, it finds your shm, and it also increases the refcount so nobody snatches it out from under you. main character behaviour fr.

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🌸 SYNOPSIS 🌸

struct tee_shm * tee_shm_get_from_id (struct tee_context *ctx , int id );

look at that signature. iconic. two args, one pointer back. 🎀

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🦋 ARGUMENTS 🦋

• ctx — the context that owns the shared memory, iykyk. it's giving "whose shm is this anyway" energy 👑
• id — the id of the shared memory object. the little name tag. the 🍓 on top.

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💀 RETURN 💀

on success you get a pointer to struct tee_shm — slay, you found it 💖

on failure you get an ERR_PTR. not NULL, bestie, ERR_PTR. use your IS_ERR() checks, don't come crying to me 😭

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🌈 SEE ALSO 🌈

literally the whole friend group. all of these live in the kernel file ./include/linux/tee_core.h:

• struct tee_device(9)
• struct tee_driver_ops(9)
• struct tee_desc(9)
• struct tee_protmem_pool(9)
• struct tee_protmem_pool_ops(9)
• tee_device_alloc(9)
• tee_device_register(9)
• tee_device_unregister(9)
• tee_device_get(9)
• tee_device_put(9)
• tee_device_set_dev_groups(9)
• tee_session_calc_client_uuid(9)
• struct tee_shm_pool(9)
• struct tee_shm_pool_ops(9)
• tee_shm_pool_free(9)
• tee_protmem_static_pool_alloc(9)
• tee_get_drvdata(9)
• tee_shm_alloc_priv_buf(9)
• tee_shm_is_dynamic(9)
• tee_shm_put(9)
• tee_shm_get_id(9)
• teedev_open(9)
• teedev_close_context(9)
• teedev_ctx_get(9)
• teedev_ctx_put(9)

psst — notice tee_shm_put(9) sitting right there in the list? that's your cleanup bestie. refcount goes up, refcount gotta come down. balance. 🧚

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and that's the whole vibe 💜 this page lives in ./include/linux, it's dated October 2026, and it's filed under tee_shm_get_from_id(9). go forth and get your shm, bestie — responsibly, with matching tee_shm_put() 🎀✨