debug_sprintf_exception(9)

💅 debug_sprintf_exception — the formatted-debug-entry icon 💅

okay bestie, welcome to the debug_sprintf_exception(9) page in the Kernel API Manual ✨ this one is all about writing a debug entry with a format string and varargs (longs) to the active debug area — but only if level <= actual debug level — and then switching to the next debug area. it’s giving “debug journaling with a plot twist” ngl 🎀

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✨ NAME ✨

debug_sprintf_exception — writes debug entry with format string and varargs (longs) to active debug area (if level <= actual debug level) and switches to next debug area. 💖

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🛠️ SYNOPSIS 🛠️

debug_sprintf_exception (_id , _level , _fmt , ... );

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🎀 ARGUMENTS 🎀

• _id — handle for debug log 🫶
• _level — debug level ⭐
• _fmt — format string for debug entry 🎀
• ... — varargs used as in sprintf ✨

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🦋 RETURN 🦋

• Address of written debug entry 👑
• NULL if error 💀

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🌸 DESCRIPTION 🌸

so the one big caveat, bestie: floats and long long datatypes cannot be used as varargs. periodt. 🙈

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🔥 SEE ALSO 🔥

Kernel file ./arch/s390/include/asm/debug.h — and the whole squad is: debug_level_enabled(9), debug_event(9), debug_int_event(9), debug_long_event(9), debug_text_event(9), debug_sprintf_event(9), debug_exception(9), debug_int_exception(9), debug_long_exception(9), debug_text_exception(9), and DEFINE_STATIC_DEBUG_INFO(9) 🌈

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mwah 💋 signed off from ./arch/s390/include/asm, October 2026, all about debug_sprintf_exception(9) 💖