dma_fence_is...naled_locked(9)

💅 dma_fence_is_signaled_locked — Kernel API Manual ✨

okay bestie, welcome to the Kernel API Manual, this one's a dma_fence_is_signaled_locked(9) situation and honestly it's giving "tiny function, big responsibility" 🎀

✨ NAME ✨

dma_fence_is_signaled_locked — returns an indication if the fence is signaled yet. that's it, that's the whole job 💖

🦋 SYNOPSIS 🦋

bool dma_fence_is_signaled_locked (struct dma_fence *fence );

🌸 ARGUMENTS 🌸

• fence — the fence to check 👀 like, the actual one you're wondering about

💜 DESCRIPTION 💜

Returns true if the fence was already signaled, false if not. simple as that, no cap ✨

🚨 okay this part is important so listen up: since this function doesn't enable signaling, it is not guaranteed to ever return true if dma_fence_add_callback, dma_fence_wait or dma_fence_enable_sw_signaling haven't been called before. so if you skipped those and you're sitting there like "why is it always false 😭" — that's why, bestie, that's the vibe check failing on purpose 💀

Also this function requires dma_fence.lock to be held. like, you literally have to be holding the lock, it's not optional, it's not a suggestion, holding it is the whole assignment 🔒👑

See also dma_fence_is_signaled — that's the unlocked cousin, iykyk 🫶

🔥 SEE ALSO 🔥

Kernel file ./include/linux/dma-fence.h and the whole friend group:

• struct dma_fence(9)
• struct dma_fence_cb(9)
• struct dma_fence_ops(9)
• dma_fence_was_initialized(9)
• dma_fence_put(9)
• dma_fence_get(9)
• dma_fence_get_rcu(9)
• dma_fence_get_rcu_safe(9)
• dma_fence_spinlock(9)
• dma_fence_lock_irqsave(9)
• dma_fence_unlock_irqrestore(9)
• dma_fence_assert_held(9)
• Safe external access to driver provided object members(9)
• dma_fence_is_signaled(9)
• __dma_fence_is_later(9)
• dma_fence_is_later(9)
• dma_fence_is_later_or_same(9)
• dma_fence_later(9)
• dma_fence_get_status_locked(9)
• dma_fence_set_error(9)
• dma_fence_timestamp(9)
• dma_fence_wait(9)
• dma_fence_is_array(9)
• dma_fence_is_chain(9)
• dma_fence_is_container(9)

and that's the whole page, periodt 🌈 this cutie lives in ./include/linux, dated October 2026, and it's dma_fence_is...naled_locked(9) signing off — mwah 💋🧚‍♀️