fdt_early_m...xtension_isa(9)

🌸 fdt_early_match_extension_isa — NAME ✨

okay so bestie, this is fdt_early_match_extension_isa from the Kernel API Manual, and it's literally just: check if all cpu nodes have an extension 💅

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🎀 SYNOPSIS 🎀

bool fdt_early_match_extension_isa (const void *fdt , const char
*ext_name );

that's the whole vibe check right there 🫶

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🦋 ARGUMENTS 🦋

• fdt — pointer to the device tree blob, aka the whole map of your hardware, no cap 🌈
• ext_name — the extension to search for, like the specific little feature you're hunting for 👑

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💖 DESCRIPTION 💖

Returns true if all the available cpu nodes have the extension, and false otherwise ✨

like, every single available cpu node has to have it. all of them. not most of them, not "the vibes are there" — all. if even one is missing the extension, it's a false and the function said nope 🙈

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🧚 SEE ALSO 🧚

• Kernel file ./arch/riscv/kernel/pi/fdt_early.c — go read the source, it's giving main character energy 📖
• fdt_device_is_available(9)
• isa_string_contains(9)
• early_cpu_isa_ext_available(9)
• set_satp_mode_from_fdt(9)

the whole friend group fr fr 💜

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okay that's the whole page bestie, tysm for reading 💖 this one's from ./arch/riscv/kernel/pi and it's dated October 2026 — so like, future iconic ✨💅🎀