selftests/bpf: Add a test for objects stuck in free_by_rcu_ttracegrafted

Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first
free_bulk() starts RCU tasks trace GP and the rest of the elements are
freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear
in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and
waiting_for_gp_ttrace lists are empty.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/rust/proc-macro2/probe.rs b/rust/proc-macro2/probe.rs
new file mode 100644
index 000000000..d68aa8cfd
--- /dev/null
+++ b/rust/proc-macro2/probe.rs
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+#![allow(dead_code)]
+
+#[cfg(proc_macro_span)]
+pub(crate) mod proc_macro_span;
+
+#[cfg(proc_macro_span_file)]
+pub(crate) mod proc_macro_span_file;
+
+#[cfg(proc_macro_span_location)]
+pub(crate) mod proc_macro_span_location;