dma_fence_begin_signalling(9)

💖 dma_fence_begin_signalling(9) 💖

From the Kernel API Manual — ok bestie, this page is your group-chat explainer for dma_fence_begin_signalling, the function that marks the start of a critical DMA fence signalling section. 🎀✨

🌸 NAME 🌸

dma_fence_begin_signalling — begin a critical DMA fence signalling section.

✨ SYNOPSIS ✨

bool dma_fence_begin_signalling (void );

🫶 ARGUMENTS 🫶

• void — no arguments. Not a single one, bestie. 🫶

🔥 DESCRIPTION 🔥

Drivers should use this to annotate the beginning of any code section required to eventually complete dma_fence by calling dma_fence_signal. That's the whole vibe: you're flagging “hey, this section is gonna finish a dma_fence eventually”. 💅

The end of these critical sections are annotated with dma_fence_end_signalling. So you open the annotation with this function and close it out with dma_fence_end_signalling, bestie. 🎀

There's an opaque cookie needed by the implementation, and it needs to be passed to dma_fence_end_signalling. Yes, an opaque cookie — mysterious, iconic, very much not a snack. 🍪✨

🌈 SEE ALSO 🌈

Kernel file: ./drivers/dma-buf/dma-fence.c

• DMA fences overview(9)
• fence cross-driver contract(9)
• dma_fence_get_stub(9)
• dma_fence_allocate_private_stub(9)
• dma_fence_context_alloc(9)
• fence signalling annotation(9)
• dma_fence_end_signalling(9)
• dma_fence_signal_timestamp_locked(9)
• dma_fence_signal_timestamp(9)
• dma_fence_signal_locked(9)
• dma_fence_check_and_signal_locked(9)
• dma_fence_check_and_signal(9)
• dma_fence_signal(9)
• dma_fence_wait_timeout(9)
• dma_fence_release(9)
• dma_fence_free(9)
• dma_fence_enable_signaling(9)
• dma_fence_add_callback(9)
• dma_fence_get_status(9)
• dma_fence_remove_callback(9)
• dma_fence_default_wait(9)
• dma_fence_wait_any_timeout(9)
• deadline hints(9)
• dma_fence_set_deadline(9)
• dma_fence_describe(9)
• dma_fence_init(9)
• dma_fence_init64(9)
• dma_fence_driver_name(9)
• dma_fence_timeline_name(9)

Source/version: ./drivers/dma-buf · Date: October 2026 · Page: dma_fence_begin_signalling(9) — ok bye bestie, go annotate those critical sections and slay responsibly 💅✨