get_max_nr_ranges(9)

✨ get_max_nr_ranges(9) ✨

okay bestie, welcome to the Kernel API Manual 💅 this one's a lil function page and it's honestly so chill — we're just doing math about memory, no cap 🧮✨

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🌸 NAME 🌸

get_max_nr_ranges — get the max no. of ranges a crash_mem structure could hold, given the size allocated for it 🫶

like. you gave it some bytes. it tells you how many ranges fit in those bytes. that's the whole vibe. iconic honestly 👑

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🦋 SYNOPSIS 🦋

unsigned int get_max_nr_ranges (size_t size );

that's it. one argument. one unsigned int coming back at you. minimal, clean, main character energy ⭐

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🎀 ARGUMENTS 🎀

• size — the allocation size of the crash_mem structure 💖 like, how much room did you set aside for it? that's the number this parameter wants. give it the size, get back the count. slay.

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🌈 DESCRIPTION 🌈

it returns the maximum no. of ranges ✨ that's literally the entire job description and honestly? respect. it knows what it is and it does not pretend otherwise 💅

you hand it the size allocated for the crash_mem structure, it hands you back the max number of ranges that structure could hold. done. no drama, no side quests, no extra params. periodt 🔥

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💜 SEE ALSO 💜

okay so this is the part where we shout out the whole friend group 🫶 the kernel file lives at ./arch/powerpc/kexec/ranges.c and here's every single one of its besties, no gatekeeping:

• get_mem_rngs_size(9)
• __add_mem_range(9)
• __merge_memory_ranges(9)
• sort_memory_ranges(9)
• realloc_mem_ranges(9)
• add_mem_range(9)
• add_tce_mem_ranges(9)
• add_initrd_mem_range(9)
• add_htab_mem_range(9)
• add_kernel_mem_range(9)
• add_rtas_mem_range(9)
• add_opal_mem_range(9)
• add_reserved_mem_ranges(9)
• get_reserved_memory_ranges(9)
• get_exclude_memory_ranges(9)
• get_usable_memory_ranges(9)
• get_crash_memory_ranges(9)

that's the whole squad, go read them too iykyk 📚✨

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ngl there's nothing dangerous here, bestie — it's a pure "give me a number, i'll give you a number" situation. no gotchas, no undefined behaviour, we're safe 💀🫶

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and that's a wrap on this page 🎀 brought to you by the source at ./arch/powerpc/kexec, dated October 2026, from the Kernel API Manual — see you in the next manpage, bestie 💖✨🦋