module_param_string(9)

💖 module_param_string(9) 💖

okay so bestie, welcome to the Kernel API Manual entry for module_param_string — it's a char array parameter, and honestly? she's lowkey the responsible older sister of the module param family. let's get into it ✨

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🌸 NAME 🌸

module_param_string — a char array parameter 🎀

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🦋 SYNOPSIS 🦋

module_param_string (name , string , len , perm );

like, that's the whole incantation. four things, no cap 💅

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💜 ARGUMENTS 💜

• name — the name of the parameter. yes bestie, this is literally what it's called 🏷️
• string — the string variable itself. the actual char array doing the work 💖
• len — the maximum length of the string, incl. terminator. don't forget the terminator, she counts! 😭
• perm — visibility in sysfs. that's your permissions vibe check 👑

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🧚 DESCRIPTION 🧚

okay so here's the moment that matters: this one actually copies the string when it's set — unlike type charp, which does not. big difference, iykyk 🫶

and len is usually just sizeof(string). that's it. that's the whole tip ⭐

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⭐ SEE ALSO ⭐

the whole friend group, ok? every single one, i'm not skipping anybody:

Kernel file ./include/linux/moduleparam.h — module_param(9), module_param_unsafe(9), module_param_named(9), module_param_named_unsafe(9), module_param_cb(9), core_param_cb(9), postcore_param_cb(9), arch_param_cb(9), subsys_param_cb(9), fs_param_cb(9), device_param_cb(9), late_param_cb(9), core_param(9), core_param_unsafe(9), __core_param_cb(9), parameq(9), parameqn(9), module_param_array(9), module_param_array_named(9), module_param_hw_named(9), module_param_hw_array(9) 🔥

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ngl bestie, if you only remember one thing: it copies. charp does not. that's the whole plot twist 💀

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okay that's the page!! mwah 💋 this one lives at ./include/linux, dated October 2026, and that's the module_param_string(9) era signing off — slay responsibly, bestie 🎀💖✨