kexec_add_buffer(9)

💖 kexec_add_buffer(9) 💖

okay so bestie, this page is from the Kernel API Manual, and it's literally about putting a buffer into a kexec segment. lowkey iconic kernel business. no cap.

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🌸 NAME 🌸

kexec_add_buffer — place a buffer in a kexec segment. that's the whole vibe.

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✨ SYNOPSIS ✨

int kexec_add_buffer (struct kexec_buf *kbuf );

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🫶 ARGUMENTS 🫶

• kbuf — buffer contents and memory parameters. it's giving "everything you need to describe the buffer and where it goes" energy.

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🦋 DESCRIPTION 🦋

so here's the tea: this function assumes that kexec_lock is held. like, it's not out here grabbing the lock itself, bestie. that's on you. 🔥

on successful return, kbuf->mem will have the physical address of the buffer in memory. so after it slays, you can peek at kbuf->mem and that's where the buffer physically lives. periodt.

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🎀 RETURN 🎀

• 0 on success — ate, no notes. 💅
• negative errno on error — it's giving "something went wrong" and you should check that errno. 😭

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👑 SEE ALSO 👑

• Kernel file ./kernel/kexec_file.c
• kexec_walk_resources(9)
• kexec_locate_mem_hole(9)

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this little manual page is from ./kernel, dated October 2026 — mwah, stay hydrated and hold your locks correctly 💋✨