WARNING: Prefer __aligned(x) over __attribute__((aligned(x)))
#56: FILE: tools/testing/selftests/bpf/progs/bpf_misc.h:192:
+#define __aligned(x) __attribute__((aligned(x)))

ERROR: Macros with complex values should be enclosed in parentheses
#88: FILE: tools/testing/selftests/bpf/progs/rbtree_search_kptr.c:21:
+#define private(name) SEC(".data." #name) __hidden __aligned(8)

BUT SEE:

   do {} while (0) advice is over-stated in a few situations:

   The more obvious case is macros, like MODULE_PARM_DESC, invoked at
   file-scope, where C disallows code (it must be in functions).  See
   $exceptions if you have one to add by name.

   More troublesome is declarative macros used at top of new scope,
   like DECLARE_PER_CPU.  These might just compile with a do-while-0
   wrapper, but would be incorrect.  Most of these are handled by
   detecting struct,union,etc declaration primitives in $exceptions.

   Theres also macros called inside an if (block), which "return" an
   expression.  These cannot do-while, and need a ({}) wrapper.

   Enjoy this qualification while we work to improve our heuristics.

CHECK: Please don't use multiple blank lines
#200: FILE: tools/testing/selftests/bpf/progs/rbtree_search_kptr.c:133:
+
+

total: 1 errors, 1 warnings, 1 checks, 192 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 0efc50fec8cf ("selftests/bpf: Add supplementary tests for bpf_kptr_xchg") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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.