January 28, 2025 at 7:29 AM, "Masami Hiramatsu (Google)" [off-list ref] wrote:

From: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Fix to remove ftrace_test_recursion_trylock() from ftrace_graph_func()

because commit d576aec24df9 ("fgraph: Get ftrace recursion lock in

function_graph_enter") has been moved it to function_graph_enter_regs()

already.

Reported-by: Jiri Olsa <redacted>

Closes: https://lore.kernel.org/all/Z5O0shrdgeExZ2kF@krava/ (local)

Fixes: d576aec24df9 ("fgraph: Get ftrace recursion lock in function_graph_enter")

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Tested-by: Jiri Olsa <jolsa@kernel.org>

[...]

Hi Masami,

Can confirm this patch fixes missed/kprobe_recursion BPF selftests on s390x:
https://github.com/kernel-patches/vmtest/actions/runs/13021621468/job/36324248903

Tested-by: Ihor Solodrai <redacted>

Thanks!