amdgpu_ring_undo(9)

💅 amdgpu_ring_undo(9)

okay bestie, welcome to the Kernel API Manual — yes we're doing kernel docs now, and honestly? iconic. this one's a lil function called amdgpu_ring_undo, and it's short but she serves.

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✨ NAME ✨

amdgpu_ring_undo — reset the wptr 🎀

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🌸 SYNOPSIS 🌸

void amdgpu_ring_undo (struct amdgpu_ring *ring );

literally that's it. no cap. 🫶

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🦋 ARGUMENTS 🦋

• ring — the amdgpu_ring structure holding the ring information 💖 this is the main character of the whole function, the one who gets her wptr reset. slay.

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⭐ DESCRIPTION ⭐

so what does it actually do? it resets the driver's copy of the wptr — and yes, that's for all asics, every single one, no exceptions, periodt. 🌈

think of it as the "undo" button energy: the driver's little note-to-self about where the write pointer was? gone. reset. fresh start. main character energy only. ✨

ngl it's a tiny function, but every ring needs her moment 💅

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🔥 SEE ALSO 🔥

the kernel file herself lives right here, in all her glory:

./drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c

and the whole friend group, because she doesn't do it alone:

• amdgpu_ring_max_ibs(9)
• amdgpu_ring_alloc(9)
• amdgpu_ring_insert_nop(9)
• amdgpu_ring_generic_pad_ib(9)
• amdgpu_ring_commit(9)
• amdgpu_ring_init(9)
• amdgpu_ring_fini(9)
• amdgpu_ring_emit_reg_write_reg_wait_helper(9)
• amdgpu_ring_soft_recovery(9)
• amdgpu_ring_test_helper(9)
• amdgpu_multi_ring_reset_helper_begin(9)
• amdgpu_multi_ring_reset_helper_end(9)

iykyk 😭👑

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mwah, that's the whole page 🍓 be sure to check out ./drivers/gpu/drm/amd/amdgpu and remember this little love letter is dated October 2026 — future vibes only, bestie 💜🧚‍♀️✨