dma_resv_lock_interruptible(9)

💅 dma_resv_lock_interruptible(9) 💅

okay so bestie, welcome to the Kernel API Manual page for dma_resv_lock_interruptible — this one is literally “lock the reservation object,” and we’re keeping every detail cute, intact, and fr fr useful. 🎀

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🎀 NAME 🎀

dma_resv_lock_interruptible — lock the reservation object. no cap, that’s the whole name vibe. 💖

✨ SYNOPSIS ✨

int dma_resv_lock_interruptible (struct dma_resv *obj , struct
       ww_acquire_ctx *ctx );

🫶 ARGUMENTS 🫶

• obj — the reservation object. the main character you’re locking. 👑
• ctx — the locking context. the little sidekick carrying the context energy. ✨

💅 DESCRIPTION 💅

okay so here’s the tea: this locks the reservation object interruptible for exclusive access and modification. 💖

important note, bestie: the 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. that’s the whole vibe check. 🔥

since the reservation object may be locked by multiple parties in an undefined order, a #ww_acquire_ctx is passed to unwind if a cycle is detected. see ww_mutex_lock and ww_acquire_init. also, a reservation object may be locked by itself by passing NULL as ctx. lowkey iconic. 🌸

when a die situation is indicated by returning -EDEADLK, all locks held by ctx must be unlocked and then dma_resv_lock_slow_interruptible called on obj. do not skip that part — it’s giving mandatory cleanup. 😭

unlocked by calling dma_resv_unlock. periodt. 💅

🌈 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_slow(9)
• dma_resv_lock_slow_interruptible(9)
• dma_resv_trylock(9)
• dma_resv_is_locked(9)
• dma_resv_locking_ctx(9)
• dma_resv_unlock(9)

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xoxo, this page is sourced from ./include/linux and dated October 2026 🦋 keeping the dma_resv_lock_interruptible(9) energy alive, fr fr 💖