radeon_ring_unlock_undo(9)

okay so bestie, welcome to the radeon_ring_unlock_undo(9) page from the Kernel API Manual 💖 this one is short, sweet, and here to reset the wptr and unlock the ring. no cap. 💅

✨ NAME ✨

radeon_ring_unlock_undo — reset the wptr and unlock the ring. periodt. 🎀

🌸 SYNOPSIS 🌸

void radeon_ring_unlock_undo (struct radeon_device *rdev , struct
       radeon_ring *ring );

💖 ARGUMENTS 💖

• rdev — the radeon device structure. that’s the device-side situation, bestie 🫶
• ring — the radeon_ring structure holding ring information. yes, it’s giving ring-info storage 💅

🦋 DESCRIPTION 🦋

So what does it actually do? It calls radeon_ring_undo first, then unlocks the ring. That’s the whole move, and it applies to all asics — every single one. 🌈✨

🎀 SEE ALSO 🎀

Kernel file first, because we love a source-file moment:

• Kernel file: ./drivers/gpu/drm/radeon/radeon_ring.c

Then the whole ring-related bestie lineup:

• radeon_ring_supports_scratch_reg(9)
• radeon_ring_free_size(9)
• radeon_ring_alloc(9)
• radeon_ring_lock(9)
• radeon_ring_commit(9)
• radeon_ring_unlock_commit(9)
• radeon_ring_undo(9)
• radeon_ring_lockup_update(9)
• radeon_ring_test_lockup(9)
• radeon_ring_backup(9)
• radeon_ring_restore(9)
• radeon_ring_init(9)
• radeon_ring_fini(9)

Source/version check, bestie: this page comes from ./drivers/gpu/drm/radeon, dated October 2026, and it’s the radeon_ring_unlock_undo(9) manual page. mwah 💋✨