arch_ftrace_update_code(9)

🌸 arch_ftrace_update_code(9) 🌸

okay bestie, welcome to the Kernel API Manual page for arch_ftrace_update_code — yes, we’re doing kernel ftrace stuff and we’re gonna slay it 💅

✨ NAME ✨

arch_ftrace_update_code — modify the code to trace or not trace.

💅 SYNOPSIS 💅

void arch_ftrace_update_code (int command );

🎀 ARGUMENTS 🎀

• command — the command that needs to be done. literally what it says, bestie 🫶

🦋 DESCRIPTION 🦋

So here’s the vibe: Archs can override this function if it does not need to run stop_machine to modify code. no cap, that’s the whole description — short, sweet, and iconic ✨

🌈 SEE ALSO 🌈

Kernel file:

• ./kernel/trace/ftrace.c

The whole ftrace squad, all (9) pages, fr fr:

• 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)
• ftrace_startup_subops(9)
• ftrace_shutdown_subops(9)
• ftrace_regex_open(9)
• allocate_ftrace_func_mapper(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)

xoxo, your kernel girl 💖 — source/version: ./kernel/trace, dated October 2026, page: arch_ftrace_update_code(9) 🫶