STRUCT SW_SYNC_GET_DEADLINE(9)

💅 struct sw_sync_get_deadline(9) — from the Kernel API Manual, bestie ✨

okay so picture this: you're deep in the kernel docs, section 9, and you land on this little cutie. it's giving "small struct, big main character energy" and honestly? we're obsessed. let's get into it 🎀

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🌸 NAME 🌸

struct sw_sync_get_deadline — literally just here to get the deadline hint of a sw_sync fence. that's the whole vibe. no cap. 🦋

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✨ SYNOPSIS ✨

struct sw_sync_get_deadline {
    __u64 deadline_ns;
    __u32 pad;
    __s32 fence_fd;
 };

look at her. iconic. 💖

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🫶 Members 🫶

• deadline_ns — the absolute time of the deadline. like, the actual timestamp, not a "in 5 minutes" kinda deal. ⏰
• pad — must be zero. zero. zilch. nothing. it's padding, she's just vibing there being zero bestie 💀
• fence_fd — the sw_sync fence fd (in). that's your input, the fence you're asking about 🔥

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💜 Description 💜

so what does it do? it returns the earliest deadline set on the fence. earliest, okay? not all of them, not the latest — the earliest one. main character deadline only 👑

and the timebase for the deadline is CLOCK_MONOTONIC (same as vblank). so when you're reading that number, just know that's the clock it's measured against, iykyk 🕰️

🚨 important though: if there is no deadline set on the fence, this ioctl will return -ENOENT. so like, bestie, be ready for that. don't say i didn't warn you 😭

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/dma-buf/sw_sync.c — the source, the origin, the blueprint 💫
• sync_timeline_create(9)
• sync_timeline_signal(9)
• sync_pt_create(9)

go read those next, fr fr 📚

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and that's the whole page, bestie! 🍓 this little gem lives under ./drivers/dma-buf and it's dated October 2026 — so mark your calendars, struct sw_sync_get_deadline(9) said see you then 💅✨🧚‍♀️