prb_read_valid_info(9)

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

okay so picture this: you're reading through the Kernel API Manual and this lil icon shows up — prb_read_valid_info. she's a non-blocking reader, she's meta-data only, and she is not about to sit around waiting for you. let's get into it 🫶

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✨ NAME ✨

prb_read_valid_info — a non-blocking read of meta data for a requested record, or (if that one's gone) the next available record. no cap. non-blocking is the whole vibe 💅

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🌸 SYNOPSIS 🌸

bool prb_read_valid_info (struct printk_ringbuffer *rb , u64 seq ,
struct printk_info *info , unsigned int *line_count );

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🎀 ARGUMENTS 🎀

• rb — the ringbuffer you're reading from. your main character 🫶
• seq — the sequence number of the record you wanna read.
• info — a buffer where the read record's meta data gets stored.
• line_count — a buffer where the number of lines in the record text gets stored.

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🦋 DESCRIPTION 🦋

so this is the public function readers get to use when they only want the meta data of a record — not the whole text, just the little info girlies. very lowkey, very efficient ✨

here's the deal: the reader hands over the info and line_count buffers and they get filled in. and listen — either of those buffer pointers can be set to NULL if you're simply not interested in that data. not your vibe? don't ask for it. we love options 💅

⚠️ okay important one: on success, the reader must check info->seq to see which record's meta data was actually read. that's how you detect dropped records. don't skip this, bestie, it's the whole point 😭

and failure? failure means seq refers to a record that isn't available to the reader yet. not gone — just not yet. patience, queen 👑

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⭐ CONTEXT ⭐

any context. literally any. she's flexible like that 🧚

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🔥 RETURN 🔥

true if a record's meta data was read, otherwise false. that's it, that's the tea ☕

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🌈 SEE ALSO 🌈

• Kernel file ./kernel/printk/printk_ringbuffer.c printk_ringbuffer overview(9)
• prb_reserve_in_last(9)
• prb_reserve(9)
• prb_commit(9)
• prb_final_commit(9)
• prb_next_reserve_seq(9)
• prb_read_valid(9)
• prb_first_valid_seq(9)
• prb_next_seq(9)
• prb_init(9)
• prb_record_text_space(9)

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anyway that's the page 💖 it lives in ./kernel/printk and it's dated October 2026 — so like, future girl summer. go read some meta data, you absolute legend 👑✨