trace_print_bitmask_seq(9)

🦋 NAME 🦋

trace_print_bitmask_seq — print a bitmask to a sequence buffer

okay so welcome to the trace_print_bitmask_seq(9) page from the Kernel API Manual, bestie 💖 you're gonna eat this one up.

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🎀 SYNOPSIS 🎀

Here's the signature, exactly as it appears — no cap:

const char * trace_print_bitmask_seq (struct trace_iterator *iter , void *bitmask_ptr , unsigned int bitmask_size );

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💅 ARGUMENTS 💅

Three little arguments, all doing main character work:

• iter — the trace iterator for the current event instance.
• bitmask_ptr — the pointer to the bitmask data.
• bitmask_size — the size of the bitmask in bytes.

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🔥 DESCRIPTION 🔥

So the vibe is: this function prints a bitmask into a sequence buffer as either a hex string or a human-readable range list, depending on the instance's "bitmask-list" trace option. Slay 💅

Not me formatting the bitmask into the iterator's temporary scratchpad rather than the primary sequence buffer — that's literally the move 😭. It avoids duplication and pointer-collision issues when the returned string is processed by a "s" specifier in a TP_printk macro. Obsessed.

the returned string lives in the temporary buffer, not the primary sequence buffer — iykyk 💖

Returns a pointer to the formatted string within the temporary buffer. Periodt ✨

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🌈 SEE ALSO 🌈

Kernel file ./kernel/trace/trace_output.c — and the whole friend group is trace_print_hex_seq(9), trace_print_lat_fmt(9), ftrace_find_event(9), register_trace_event(9), unregister_trace_event(9).

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cute sign-off: source/version ./kernel/trace, date October 2026 💖✨