allocate_ftrace_func_mapper(9)

💅 allocate_ftrace_func_mapper(9)

okay so bestie, welcome to the Kernel API Manual ✨ — this is one of those little pages that's short, sweet, and does exactly one thing. and honestly? it ate. let's get into it 🫶

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🌸 NAME

allocate_ftrace_func_mapper — literally just allocates you a brand new ftrace_func_mapper, no cap 💖

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🎀 SYNOPSIS

struct ftrace_func_mapper * allocate_ftrace_func_mapper (void );

like, that's it. that's the whole call. she's simple, she's iconic 👑

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🦋 ARGUMENTS

• void — no arguments. nothing. zero. empty. you don't pass her anything, she doesn't want anything 💀 (genuinely the easiest arg list you'll ever read)

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✨ RETURN

you get back a ftrace_func_mapper descriptor — and the whole point of that descriptor is that it can be used to map ips to data. that's the vibe check, that's the whole job 🌈

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💜 SEE ALSO

and now the part where the manpage goes absolutely feral with cross-references 😭 — Kernel file ./kernel/trace/ftrace.c and like, every ftrace-adjacent function that exists:

• ftrace_lookup_ip(9)
• ftrace_free_filter(9)
• ftrace_hash_move(9)
• ftrace_location_range(9)
• ftrace_location(9)
• ftrace_text_reserved(9)
• ftrace_bug(9)
• ftrace_update_record(9)
• ftrace_test_record(9)
• ftrace_get_addr_new(9)
• ftrace_get_addr_curr(9)
• ftrace_rec_iter_start(9)
• ftrace_rec_iter_next(9)
• ftrace_rec_iter_record(9)
• ftrace_run_stop_machine(9)
• arch_ftrace_update_code(9)
• ftrace_startup_subops(9)
• ftrace_shutdown_subops(9)
• ftrace_regex_open(9)
• ftrace_func_mapper_find_ip(9)
• ftrace_func_mapper_add_ip(9)
• ftrace_func_mapper_remove_ip(9)
• free_ftrace_func_mapper(9)
• register_ftrace_direct(9)
• unregister_ftrace_direct(9)
• modify_ftrace_direct_nolock(9)
• modify_ftrace_direct(9)
• hash_add(9)
• update_ftrace_direct_add(9)
• hash_sub(9)
• update_ftrace_direct_del(9)
• update_ftrace_direct_mod(9)
• ftrace_set_filter_ip(9)
• ftrace_set_filter_ips(9)
• ftrace_ops_set_global_filter(9)
• ftrace_set_filter(9)
• ftrace_set_notrace(9)
• ftrace_set_global_filter(9)
• ftrace_set_global_notrace(9)
• ftrace_ops_get_func(9)
• ftrace_kill(9)
• ftrace_is_dead(9)
• register_ftrace_function(9)
• unregister_ftrace_function(9)
• ftrace_lookup_symbols(9)

like hello?? that's a whole friend group 😭💅 but every single one of them is right there if you need her.

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🧚 quick reminder: this page only allocates the mapper. if you're the one who allocated it, you're also the one who's gotta free_ftrace_func_mapper it later. main character energy comes with main character responsibilities, bestie 🎀

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and that's the whole page!! short, slay, useful. brought to you from the kernel file ./kernel/trace in the source tree, dated October 2026, and printed under the title allocate_ftrace_func_mapper(9) — mwah 💋⭐