On Tue, 20 Aug 2024 19:49:14 -0400 Steven Rostedt <rost...@goodmis.org> wrote:
> On Wed, 21 Aug 2024 08:43:51 +0900 > Masami Hiramatsu (Google) <mhira...@kernel.org> wrote: > > > > Can you add the __used and see if it fixes it? > > > > Adding __used to DYN_FTRACE_TEST_NAME() and DYN_FTRACE_TEST_NAME2() does > > not change, the test still fails. > > OK, now that sounds like a bug in LTO itself. Hmm, I think __used just preserve the function exists as a function. But the callsite can be optimized. This mean the __used function code is duplicated, and embedded one copy in the callsite, but keep another copy as a function which can be used from outside. But "noinline" attribute seems to be expected not embedded in the callsite (because that is what "inlined" mean), so it looks like a bug. Thank you, > > -- Steve -- Masami Hiramatsu (Google) <mhira...@kernel.org>
