diff options
| author |  Dr. David Alan Gilbert <linux@treblig.org>
| 2024-05-07 00:33:05 +0100 |
|---|---|---|
| committer |  Steven Rostedt (Google) <rostedt@goodmis.org>
| 2024-05-14 02:09:40 -0400 |
| commit | d2cc859cc8885e98907cffd47b990491c5321a80 (patch) | |
| tree | 22a2e7dc51735bdeb7f443db5f4595662c52d62b /kernel/trace | |
| parent | ftrace: Remove unused list 'ftrace_direct_funcs' (diff) | |
| download | linux-d2cc859cc8885e98907cffd47b990491c5321a80.tar.gz linux-d2cc859cc8885e98907cffd47b990491c5321a80.tar.bz2 linux-d2cc859cc8885e98907cffd47b990491c5321a80.zip | |
ftrace: Remove unused global 'ftrace_direct_func_count'
Commit 8788ca164eb4b ("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>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/fgraph.c | 11 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 1 |
2 files changed, 0 insertions, 12 deletions
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c index c83c005e654e..a130b2d898f7 100644 --- a/kernel/trace/fgraph.c +++ b/kernel/trace/fgraph.c @@ -125,17 +125,6 @@ int function_graph_enter(unsigned long ret, unsigned long func, { struct ftrace_graph_ent trace; -#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS - /* - * Skip graph tracing if the return location is served by direct trampoline, - * since call sequence and return addresses are unpredictable anyway. - * Ex: BPF trampoline may call original function and may skip frame - * depending on type of BPF programs attached. - */ - if (ftrace_direct_func_count && - ftrace_find_rec_direct(ret - MCOUNT_INSN_SIZE)) - return -EBUSY; -#endif trace.func = func; trace.depth = ++current->curr_ret_depth; diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 4613bf67ef2c..5a01d72f66db 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2538,7 +2538,6 @@ ftrace_find_unique_ops(struct dyn_ftrace *rec) /* Protected by rcu_tasks for reading, and direct_mutex for writing */ static struct ftrace_hash __rcu *direct_functions = EMPTY_HASH; static DEFINE_MUTEX(direct_mutex); -int ftrace_direct_func_count; /* * Search the direct_functions hash to see if the given instruction pointer |