From 4046bf023b0647d09704a32d9fe8aecbcee3e4c3 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Fri, 20 Jan 2017 11:44:46 +0900 Subject: [PATCH] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip It will be used when checking graph filter hashes later. Link: http://lkml.kernel.org/r/20170120024447.26097-2-namhyung@kernel.org Signed-off-by: Namhyung Kim [ Moved ftrace_hash dec and functions outside of FUNCTION_GRAPH define ] Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/ftrace.c | 14 +------------- kernel/trace/trace.h | 16 +++++++++++++++- 2 files changed, 16 insertions(+), 14 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 37b0e948d924..0470e373b9b4 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1110,13 +1110,6 @@ struct ftrace_func_entry { unsigned long ip; }; -struct ftrace_hash { - unsigned long size_bits; - struct hlist_head *buckets; - unsigned long count; - struct rcu_head rcu; -}; - /* * We make these constant because no one should touch them, * but they are used as the default "empty hash", to avoid allocating @@ -1192,12 +1185,7 @@ struct ftrace_page { static struct ftrace_page *ftrace_pages_start; static struct ftrace_page *ftrace_pages; -static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash) -{ - return !hash || !hash->count; -} - -static struct ftrace_func_entry * +struct ftrace_func_entry * ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip) { unsigned long key; diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 1ea51ab53edf..9001460291bb 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -753,6 +753,21 @@ enum print_line_t print_trace_line(struct trace_iterator *iter); extern char trace_find_mark(unsigned long long duration); +struct ftrace_hash { + unsigned long size_bits; + struct hlist_head *buckets; + unsigned long count; + struct rcu_head rcu; +}; + +struct ftrace_func_entry * +ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip); + +static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash) +{ + return !hash || !hash->count; +} + /* Standard output formatting function used for function return traces */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER @@ -787,7 +802,6 @@ extern void __trace_graph_return(struct trace_array *tr, struct ftrace_graph_ret *trace, unsigned long flags, int pc); - #ifdef CONFIG_DYNAMIC_FTRACE /* TODO: make this variable */ #define FTRACE_GRAPH_MAX_FUNCS 32 -- 2.20.1