dma_resv_trylock(9)

💖 dma_resv_trylock(9) 💖

okay so this is the Kernel API Manual page for dma_resv_trylock(9), and it's giving “tiny function, big lock energy” ✨. Let's get into it, bestie.

✨ NAME ✨

dma_resv_trylock — trylock the reservation object 🎀

🌸 SYNOPSIS 🌸

bool dma_resv_trylock (struct dma_resv *obj );

🦋 ARGUMENTS 🦋

• obj — the reservation object 👑 (like, the thing you're trying to lock, bestie).

🔥 DESCRIPTION 🔥

Okay so dma_resv_trylock tries to lock the reservation object for exclusive access and modification. slay. But bestie, listen: this lock is only against other writers — readers will run concurrently with a writer under RCU. The seqlock is used to notify readers if they overlap with a writer. iykyk 💅

Also note that since no context is provided, no deadlock protection is possible, which is also not needed for a trylock. periodt. Returns true if the lock was acquired, false otherwise. no cap 🫶

🌈 SEE ALSO 🌈

• Kernel file ./include/linux/dma-resv.h
• enum dma_resv_usage(9)
• dma_resv_usage_rw(9)
• struct dma_resv(9)
• struct dma_resv_iter(9)
• dma_resv_iter_begin(9)
• dma_resv_iter_end(9)
• dma_resv_iter_usage(9)
• dma_resv_iter_is_restarted(9)
• dma_resv_for_each_fence_unlocked(9)
• dma_resv_for_each_fence(9)
• dma_resv_lock(9)
• dma_resv_lock_interruptible(9)
• dma_resv_lock_slow(9)
• dma_resv_lock_slow_interruptible(9)
• dma_resv_is_locked(9)
• dma_resv_locking_ctx(9)
• dma_resv_unlock(9)

signing off from ./include/linux, October 2026, with dma_resv_trylock(9) — bye bestie! 🫶💖