This can happen in situations when CONFIG_HID_SUPPORT is set to no, or
some complex situations where struct bpf_wq is not exported.

So do the usual dance of hiding them before including vmlinux.h, and
then redefining them and make use of CO-RE to have the correct offsets.

Reported-by: kernel test robot <[email protected]>
Closes: 
https://lore.kernel.org/oe-kbuild-all/[email protected]/
Cc: [email protected]
Signed-off-by: Benjamin Tissoires <[email protected]>
---
 tools/testing/selftests/hid/progs/hid_bpf_helpers.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h 
b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h
index 80ab60905865..2c6ec907dd05 100644
--- a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h
+++ b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h
@@ -8,9 +8,11 @@
 /* "undefine" structs and enums in vmlinux.h, because we "override" them below 
*/
 #define hid_bpf_ctx hid_bpf_ctx___not_used
 #define hid_bpf_ops hid_bpf_ops___not_used
+#define hid_device hid_device___not_used
 #define hid_report_type hid_report_type___not_used
 #define hid_class_request hid_class_request___not_used
 #define hid_bpf_attach_flags hid_bpf_attach_flags___not_used
+#define bpf_wq bpf_wq___not_used
 #define HID_INPUT_REPORT         HID_INPUT_REPORT___not_used
 #define HID_OUTPUT_REPORT        HID_OUTPUT_REPORT___not_used
 #define HID_FEATURE_REPORT       HID_FEATURE_REPORT___not_used
@@ -29,9 +31,11 @@
 
 #undef hid_bpf_ctx
 #undef hid_bpf_ops
+#undef hid_device
 #undef hid_report_type
 #undef hid_class_request
 #undef hid_bpf_attach_flags
+#undef bpf_wq
 #undef HID_INPUT_REPORT
 #undef HID_OUTPUT_REPORT
 #undef HID_FEATURE_REPORT
@@ -55,6 +59,14 @@ enum hid_report_type {
        HID_REPORT_TYPES,
 };
 
+struct hid_device {
+       unsigned int id;
+} __attribute__((preserve_access_index));
+
+struct bpf_wq {
+       __u64 __opaque[2];
+};
+
 struct hid_bpf_ctx {
        struct hid_device *hid;
        __u32 allocated_size;

-- 
2.52.0


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