[PATCH RFC bpf-next v3 14/16] HID: bpf: allow to use bpf_timer_set_sleepable_cb() in tracing callbacks.

[Benjamin Tissoires <bentiss@xxxxxxxxxx>]

Export the sleepable kfuncs we have on HID-BPF in tracing bpf programs,
but with the condition of being used in a sleepable context.
This allows to use the bpf_timer when used in a sleepable context
through bpf_timer_set_sleepable_cb() and initiate work from a device event.

Signed-off-by: Benjamin Tissoires <bentiss@xxxxxxxxxx>

---

no changes in v3

new in v2
---
 drivers/hid/bpf/hid_bpf_dispatch.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/hid/bpf/hid_bpf_dispatch.c b/drivers/hid/bpf/hid_bpf_dispatch.c
index e1a650f4a626..275f2057c48d 100644
--- a/drivers/hid/bpf/hid_bpf_dispatch.c
+++ b/drivers/hid/bpf/hid_bpf_dispatch.c
@@ -544,6 +544,11 @@ __bpf_kfunc_end_defs();
  */
 BTF_KFUNCS_START(hid_bpf_kfunc_ids)
 BTF_ID_FLAGS(func, hid_bpf_get_data, KF_RET_NULL)
+BTF_ID_FLAGS(func, hid_bpf_allocate_context, KF_ACQUIRE | KF_RET_NULL | KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_release_context, KF_RELEASE | KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_hw_request, KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_hw_output_report, KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_input_report, KF_SLEEPABLE)
 BTF_KFUNCS_END(hid_bpf_kfunc_ids)
 
 static const struct btf_kfunc_id_set hid_bpf_kfunc_set = {
@@ -566,11 +571,11 @@ static const struct btf_kfunc_id_set hid_bpf_fmodret_set = {
 /* for syscall HID-BPF */
 BTF_KFUNCS_START(hid_bpf_syscall_kfunc_ids)
 BTF_ID_FLAGS(func, hid_bpf_attach_prog)
-BTF_ID_FLAGS(func, hid_bpf_allocate_context, KF_ACQUIRE | KF_RET_NULL)
-BTF_ID_FLAGS(func, hid_bpf_release_context, KF_RELEASE)
-BTF_ID_FLAGS(func, hid_bpf_hw_request)
-BTF_ID_FLAGS(func, hid_bpf_hw_output_report)
-BTF_ID_FLAGS(func, hid_bpf_input_report)
+BTF_ID_FLAGS(func, hid_bpf_allocate_context, KF_ACQUIRE | KF_RET_NULL | KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_release_context, KF_RELEASE | KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_hw_request, KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_hw_output_report, KF_SLEEPABLE)
+BTF_ID_FLAGS(func, hid_bpf_input_report, KF_SLEEPABLE)
 BTF_KFUNCS_END(hid_bpf_syscall_kfunc_ids)
 
 static const struct btf_kfunc_id_set hid_bpf_syscall_kfunc_set = {

-- 
2.43.0