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, 29 insertions, 0 deletions

diff --git a/drivers/s390/cio/Makefile b/drivers/s390/cio/Makefile
new file mode 100644
index 000000000..611a39103
--- /dev/null
+++ b/drivers/s390/cio/Makefile
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the S/390 common i/o drivers
+#
+
+CONTEXT_ANALYSIS := y
+
+# The following is required for define_trace.h to find ./trace.h
+CFLAGS_trace.o := -I$(src)
+CFLAGS_vfio_ccw_trace.o := -I$(src)
+
+obj-y += airq.o blacklist.o chsc.o cio.o css.o chp.o idset.o isc.o \
+	fcx.o itcw.o crw.o ccwreq.o trace.o ioasm.o cio_debugfs.o
+ccw_device-objs += device.o device_fsm.o device_ops.o
+ccw_device-objs += device_id.o device_pgid.o device_status.o
+obj-y += ccw_device.o cmf.o
+obj-$(CONFIG_CHSC_SCH) += chsc_sch.o
+obj-$(CONFIG_EADM_SCH) += eadm_sch.o
+obj-$(CONFIG_SCM_BUS) += scm.o
+obj-$(CONFIG_CCWGROUP) += ccwgroup.o
+
+qdio-objs := qdio_main.o qdio_thinint.o qdio_debug.o qdio_setup.o
+obj-$(CONFIG_QDIO) += qdio.o
+
+vfio_ccw-objs += vfio_ccw_drv.o vfio_ccw_cp.o vfio_ccw_ops.o vfio_ccw_fsm.o \
+	vfio_ccw_async.o vfio_ccw_trace.o vfio_ccw_chp.o
+obj-$(CONFIG_VFIO_CCW) += vfio_ccw.o
+
+obj-$(CONFIG_CIO_INJECT) += cio_inject.o