find_any_var_ref(9)

💅 find_any_var_ref 💅

okay so bestie, welcome to the Kernel API Manual ✨ this page is literally about find_any_var_ref(9), and it's giving main character energy 💖 iykyk.

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🌸 NAME 🌸

find_any_var_ref — check if there is a reference to a given trigger variable 🎀

✨ SYNOPSIS ✨

       struct hist_field * find_any_var_ref (struct hist_trigger_data
       *hist_data , unsigned int var_idx );

🎀 ARGUMENTS 🎀

• hist_data — the hist trigger 🫶
• var_idx — the trigger variable identifier 🔥

💜 DESCRIPTION 💜

so the whole point is to check to see whether the given variable is currently referenced by any other trigger 👀 lowkey a vibe check for references.

and listen, the trigger the variable is defined on is explicitly excluded — the assumption being that a self-reference doesn't prevent a trigger from being removed. no cap, that's the rule 💅

⭐ RETURN ⭐

if so, you get the VAR_REF field referencing the variable 🌟 if not, you get NULL 💀 that's the whole answer, periodt ✨

🦋 SEE ALSO 🦋

Kernel file ./kernel/trace/trace_events_hist.c 🧚

• check_field_for_var_ref(9)
• find_var_ref(9)
• check_var_refs(9)
• create_var_ref(9)
• create_field_var_hist(9)
• create_target_field_var(9)

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that's the whole page, bestie, slay! sourced from ./kernel/trace, dated October 2026, and filed under find_any_var_ref(9) 💖💅