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ftrace: Remove unused global 'ftrace_direct_func_count'
Commit 8788ca164e
("ftrace: Remove the legacy _ftrace_direct API")
stopped setting the 'ftrace_direct_func_count' variable, but left
it around. Clean it up.
Link: https://lore.kernel.org/linux-trace-kernel/20240506233305.215735-1-linux@treblig.org
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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@ -413,7 +413,6 @@ struct ftrace_func_entry {
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};
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
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extern int ftrace_direct_func_count;
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unsigned long ftrace_find_rec_direct(unsigned long ip);
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int register_ftrace_direct(struct ftrace_ops *ops, unsigned long addr);
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int unregister_ftrace_direct(struct ftrace_ops *ops, unsigned long addr,
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@ -425,7 +424,6 @@ void ftrace_stub_direct_tramp(void);
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#else
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struct ftrace_ops;
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# define ftrace_direct_func_count 0
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static inline unsigned long ftrace_find_rec_direct(unsigned long ip)
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{
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return 0;
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@ -125,17 +125,6 @@ int function_graph_enter(unsigned long ret, unsigned long func,
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{
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struct ftrace_graph_ent trace;
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#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
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/*
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* Skip graph tracing if the return location is served by direct trampoline,
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* since call sequence and return addresses are unpredictable anyway.
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* Ex: BPF trampoline may call original function and may skip frame
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* depending on type of BPF programs attached.
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*/
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if (ftrace_direct_func_count &&
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ftrace_find_rec_direct(ret - MCOUNT_INSN_SIZE))
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return -EBUSY;
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#endif
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trace.func = func;
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trace.depth = ++current->curr_ret_depth;
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@ -2538,7 +2538,6 @@ ftrace_find_unique_ops(struct dyn_ftrace *rec)
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/* Protected by rcu_tasks for reading, and direct_mutex for writing */
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static struct ftrace_hash __rcu *direct_functions = EMPTY_HASH;
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static DEFINE_MUTEX(direct_mutex);
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int ftrace_direct_func_count;
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/*
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* Search the direct_functions hash to see if the given instruction pointer
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