WARNING: Unknown commit id 'e249056c91a2', maybe rebased or not pulled?
#12: 
[1] commit e249056c91a2 ("fs: place f_ref to 3rd cache line in struct

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#31: FILE: tools/testing/selftests/bpf/progs/test_module_attach.c:120:
+	*(volatile int *)ret;

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#44: FILE: tools/testing/selftests/bpf/progs/test_subprogs_extable.c:24:
+	*(volatile int *)ret;

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#53: FILE: tools/testing/selftests/bpf/progs/test_subprogs_extable.c:34:
+	*(volatile int *)ret;

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#62: FILE: tools/testing/selftests/bpf/progs/test_subprogs_extable.c:44:
+	*(volatile int *)ret;

total: 0 errors, 5 warnings, 0 checks, 32 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 fc2709eeae5c ("selftests/bpf: Fix tests after change in struct file") 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.
total: 0 errors, 5 warnings, 0 checks, 32 lines checked