msi_bitmap_r...ve_dt_hwirqs(9)

💅 NAME 💅

msi_bitmap_reserve_dt_hwirqs — bestie, this one reserves the irqs that are specified in the device tree ✨

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🎀 SYNOPSIS 🎀

int msi_bitmap_reserve_dt_hwirqs (struct msi_bitmap *bmp );

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🌸 ARGUMENTS 🌸

• bmp — a pointer to the MSI bitmap, aka the lil data structure we're about to poke at 🫶

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🦋 DESCRIPTION 🦋

okay so here's the vibe 👑: this function goes and looks in the device tree to see if there's a property specifying which irqs can be used for MSI. Like, it's checking the group chat to see who's actually invited 💅

If it finds that property, then those irqs that are reserved in the device tree get reserved in the bitmap too. matching energy, no cap ✨

and the return values? iconic, honestly:

• 0 — success, we ate 🍓
• < 0 — there was an error, it's giving 😭
• > 0 — no property was found in the device tree at all, awkward 💀

ngl bestie, that last one's the sneaky one — a positive return isn't a win, it's literally "couldn't find the thing." keep an eye on it 🙈

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🔥 SEE ALSO 🔥

• Kernel file ./arch/powerpc/sysdev/msi_bitmap.c — the main character source file itself, go read it iykyk 📖

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and that's the whole page, bestie 🧚 this one's from ./arch/powerpc/sysdev, dated October 2026, and it covers msi_bitmap_r...ve_dt_hwirqs(9) — the Kernel API Manual said so, so it's fr fr 💖💅