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, 59 insertions, 0 deletions

diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig
new file mode 100644
index 000000000..d281da1cd
--- /dev/null
+++ b/drivers/usb/mtu3/Kconfig
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# For MTK USB3.0 IP
+
+config USB_MTU3
+	tristate "MediaTek USB3 Dual Role controller"
+	depends on USB || USB_GADGET
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	depends on EXTCON || !EXTCON
+	select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD
+	help
+	  Say Y or M here if your system runs on MediaTek SoCs with
+	  Dual Role SuperSpeed USB controller. You can select usb
+	  mode as peripheral role or host role, or both.
+
+	  If you don't know what this is, please say N.
+
+	  Choose M here to compile this driver as a module, and it
+	  will be called mtu3.ko.
+
+
+if USB_MTU3
+choice
+	prompt "MTU3 Mode Selection"
+	default USB_MTU3_DUAL_ROLE if (USB && USB_GADGET)
+	default USB_MTU3_HOST if (USB && !USB_GADGET)
+	default USB_MTU3_GADGET if (!USB && USB_GADGET)
+
+config USB_MTU3_HOST
+	bool "Host only mode"
+	depends on USB=y || USB=USB_MTU3
+	help
+	  Select this when you want to use MTU3 in host mode only,
+	  thereby the gadget feature will be regressed.
+
+config USB_MTU3_GADGET
+	bool "Gadget only mode"
+	depends on USB_GADGET=y || USB_GADGET=USB_MTU3
+	help
+	  Select this when you want to use MTU3 in gadget mode only,
+	  thereby the host feature will be regressed.
+
+config USB_MTU3_DUAL_ROLE
+	bool "Dual Role mode"
+	depends on ((USB=y || USB=USB_MTU3) && (USB_GADGET=y || USB_GADGET=USB_MTU3))
+	depends on (EXTCON=y || EXTCON=USB_MTU3)
+	select USB_ROLE_SWITCH
+	help
+	  This is the default mode of working of MTU3 controller where
+	  both host and gadget features are enabled.
+
+endchoice
+
+config USB_MTU3_DEBUG
+	bool "Enable Debugging Messages"
+	help
+	  Say Y here to enable debugging messages in the MTU3 Driver.
+
+endif