diff options
| author | Steven Rostedt <rostedt@goodmis.org> | 2025-07-04 10:48:38 -0400 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-07-22 20:15:56 -0400 |
| commit | 4d6d0a6263babf7c43faa55de4fa3c6637dec624 (patch) | |
| tree | 17c2a7509f4ddd4c9844a65750bb44b899a2b6c7 /kernel/trace/ftrace.c | |
| parent | 9b4d5d330fcd40bbc38a1e6ed3d617e674d651fa (diff) | |
tracing: Remove redundant config HAVE_FTRACE_MCOUNT_RECORD
Ftrace is tightly coupled with architecture specific code because it
requires the use of trampolines written in assembly. This means that when
a new feature or optimization is made, it must be done for all
architectures. To simplify the approach, CONFIG_HAVE_FTRACE_* configs are
added to denote which architecture has the new enhancement so that other
architectures can still function until they too have been updated.
The CONFIG_HAVE_FTRACE_MCOUNT was added to help simplify the
DYNAMIC_FTRACE work, but now every architecture that implements
DYNAMIC_FTRACE also has HAVE_FTRACE_MCOUNT set too, making it redundant
with the HAVE_DYNAMIC_FTRACE.
Remove the HAVE_FTRACE_MCOUNT config and use DYNAMIC_FTRACE directly where
applicable.
Link: https://lore.kernel.org/all/20250703154916.48e3ada7@gandalf.local.home/
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/20250704104838.27a18690@gandalf.local.home
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 4203fad56b6c..00b76d450a89 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1042,10 +1042,6 @@ static struct ftrace_ops *removed_ops; */ static bool update_all_ops; -#ifndef CONFIG_FTRACE_MCOUNT_RECORD -# error Dynamic ftrace depends on MCOUNT_RECORD -#endif - struct ftrace_func_probe { struct ftrace_probe_ops *probe_ops; struct ftrace_ops ops; |