kfifo_initialized(9)

💅 kfifo_initialized(9) — the Kernel API Manual, bestie edition 🎀

Okay so we're deep in the kernel API manual today, specifically kfifo_initialized, and honestly? She's a little icon. Small, focused, does exactly one thing. Main character energy of a function, no cap.

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✨ NAME ✨

kfifo_initialized — check if the fifo is initialized 🦋

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🌸 SYNOPSIS 🌸

kfifo_initialized (fifo );

That's it. That's the whole vibe. One argument, one answer. Periodt.

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💖 ARGUMENTS 💖

• fifo — the address of the fifo you wanna check. Like, hand her the address and she'll tell you what's up 🫶

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⭐ DESCRIPTION ⭐

So here's the tea: this one returns true if fifo is initialized, and false otherwise. That's the whole gig. Literally just a vibe check for your fifo 🔥

⚠️ Important caveat, don't skip this: it assumes the fifo was 0 before. So like, if you didn't zero it out first, bestie, the answer is not gonna be trustworthy 😭 No cap, that assumption is load-bearing.

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💜 SEE ALSO 💜

The kernel file over at ./include/linux/kfifo.h — that's the mothership, go say hi 🧚

And then the whole friend group, fr fr:

DECLARE_KFIFO_PTR(9), DECLARE_KFIFO(9), INIT_KFIFO(9), DEFINE_KFIFO(9), kfifo_esize(9), kfifo_recsize(9), kfifo_size(9), kfifo_reset(9), kfifo_reset_out(9), kfifo_len(9), kfifo_is_empty(9), kfifo_is_empty_spinlocked(9), kfifo_is_empty_spinlocked_noirqsave(9), kfifo_is_full(9), kfifo_avail(9), kfifo_skip_count(9), kfifo_skip(9), kfifo_peek_len(9), kfifo_alloc(9), kfifo_alloc_node(9), kfifo_free(9), kfifo_init(9), kfifo_put(9), kfifo_get(9), kfifo_peek(9), kfifo_in(9), kfifo_in_spinlocked(9), kfifo_in_spinlocked_noirqsave(9), kfifo_out(9), kfifo_out_spinlocked(9), kfifo_out_spinlocked_noirqsave(9), kfifo_from_user(9), kfifo_to_user(9), kfifo_dma_in_prepare_mapped(9), kfifo_dma_in_finish(9), kfifo_dma_out_prepare_mapped(9), kfifo_dma_out_finish(9), kfifo_out_peek(9), kfifo_out_linear(9), kfifo_out_linear_ptr(9)

Like, the entire kfifo squad showed up to the group chat. Slay 👑

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And that's the page, babes! 🌈 This little drop came to you courtesy of ./include/linux, dated October 2026 — go follow the source, she's iconic 💅✨