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, 34 insertions, 0 deletions

diff --git a/net/rfkill/Kconfig b/net/rfkill/Kconfig
new file mode 100644
index 000000000..83a7af898
--- /dev/null
+++ b/net/rfkill/Kconfig
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# RF switch subsystem configuration
+#
+menuconfig RFKILL
+	tristate "RF switch subsystem support"
+	help
+	  Say Y here if you want to have control over RF switches
+	  found on many WiFi and Bluetooth cards.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rfkill.
+
+# LED trigger support
+config RFKILL_LEDS
+	bool
+	depends on RFKILL
+	depends on LEDS_TRIGGERS = y || RFKILL = LEDS_TRIGGERS
+	default y
+
+config RFKILL_INPUT
+	bool "RF switch input support" if EXPERT
+	depends on RFKILL
+	depends on INPUT = y || RFKILL = INPUT
+	default y if !EXPERT
+
+config RFKILL_GPIO
+	tristate "GPIO RFKILL driver"
+	depends on RFKILL
+	depends on GPIOLIB || COMPILE_TEST
+	default n
+	help
+	  If you say yes here you get support of a generic gpio RFKILL
+	  driver.