check_pattern(9)

💅 check_pattern(9) — ok so bestie, welcome to the Kernel API Manual 🎀

Like, hi. You're reading check_pattern(9), and honestly? She's a little legend. Let's get into it. ✨

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🌸 NAME 🌸

check_pattern — [GENERIC] check if a pattern is in the buffer 🦋

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⭐ SYNOPSIS ⭐

int check_pattern (uint8_t *buf , int len , int paglen , struct
nand_bbt_descr *td );

That's the whole vibe. Four args, one int coming back at you. No cap. 💖

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🎀 ARGUMENTS 🎀

• buf — the buffer to search 🔍 like, the actual haystack, and yes the pattern is the needle, we're doing this metaphor, deal with it.
• len — the length of buffer to search 📏 how far into buf we're allowed to snoop.
• paglen — the pagelength 💫 that's it, that's the whole description, she's a woman of few words and we respect her.
• td — search pattern descriptor 👑 the struct nand_bbt_descr * that tells us what we're even looking for. main character energy fr fr.

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🧚 DESCRIPTION 🧚

Ok so here's the tea: check_pattern checks for a pattern at the given place. Simple. Iconic. To the point. 🫶

She's used to search bad block tables and good / bad block identifiers. That's the whole job and she ate. 💅

no extra lore, bestie — that's genuinely all the manpage gives us, and we are not out here inventing behaviour. 🙈

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🌈 SEE ALSO 🌈

The whole friend group 💜 (all from the Kernel file ./drivers/mtd/nand/raw/nand_bbt.c):

• check_short_pattern(9)
• add_marker_len(9)
• read_bbt(9)
• read_abs_bbt(9)
• scan_read_oob(9)
• read_abs_bbts(9)
• create_bbt(9)
• search_bbt(9)
• search_read_bbts(9)
• get_bbt_block(9)
• mark_bbt_block_bad(9)
• write_bbt(9)
• nand_memory_bbt(9)
• check_create(9)
• nand_update_bbt(9)
• mark_bbt_region(9)
• verify_bbt_descr(9)
• nand_scan_bbt(9)
• nand_create_badblock_pattern(9)
• nand_create_bbt(9)
• nand_isreserved_bbt(9)
• nand_isbad_bbt(9)
• nand_markbad_bbt(9)

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mwah 💋 that's the page. sourced straight from ./drivers/mtd/nand/raw, stamped October 2026, and yeah she's filed under check_pattern(9) in the Kernel API Manual. go read the source, ily, bye 🦋💖