==========
checkpatch - FAILED

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#72: 
new file mode 100644

WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#77: FILE: tools/testing/selftests/bpf/progs/bpf_qdisc_netem.c:1:
+#include <vmlinux.h>

CHECK: spaces preferred around that '*' (ctx:WxV)
#95: FILE: tools/testing/selftests/bpf/progs/bpf_qdisc_netem.c:19:
+	struct sk_buff __kptr *skb;
 	                      ^

ERROR: Macros with complex values should be enclosed in parentheses
#115: FILE: tools/testing/selftests/bpf/progs/bpf_qdisc_netem.c:39:
+#define private(name) SEC(".data." #name) __hidden __attribute__((aligned(8)))

WARNING: Prefer __aligned(8) over __attribute__((aligned(8)))
#115: FILE: tools/testing/selftests/bpf/progs/bpf_qdisc_netem.c:39:
+#define private(name) SEC(".data." #name) __hidden __attribute__((aligned(8)))

CHECK: spaces preferred around that '<<' (ctx:VxV)
#141: FILE: tools/testing/selftests/bpf/progs/bpf_qdisc_netem.c:65:
+	answer = (value * ((1ull<<32) - rho) + state->last * rho) >> 32;
 	                        ^

WARNING: From:/Signed-off-by: email address mismatch: 'From: Amery Hung <ameryhung@gmail.com>' != 'Signed-off-by: Amery Hung <amery.hung@bytedance.com>'

total: 1 errors, 4 warnings, 2 checks, 304 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit a4f8ae10ec34 ("selftests: Add a bpf netem qdisc to selftest") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.