diff mbox series

[bpf-next,v3,07/11] selftests/bpf: change NAME_NTH/IS_NAME_NTH for BTF_KIND_TAG format

Message ID 20210914223041.248009-1-yhs@fb.com (mailing list archive)
State Accepted
Commit 3df3bd68d4811bccc74adc04d4d84512957a1a07
Delegated to: BPF
Headers show
Series bpf: add support for new btf kind BTF_KIND_TAG | expand

Checks

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bpf/vmtest-bpf-next-PR success PR summary
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netdev/tree_selection success Clearly marked for bpf-next
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netdev/cc_maintainers warning 10 maintainers not CCed: kpsingh@kernel.org john.fastabend@gmail.com iii@linux.ibm.com linux-kselftest@vger.kernel.org shuah@kernel.org yangjunlin@yulong.com quentin@isovalent.com songliubraving@fb.com netdev@vger.kernel.org kafai@fb.com
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netdev/checkpatch warning CHECK: Macro argument 'N' may be better as '(N)' to avoid precedence issues CHECK: Macro argument 'X' may be better as '(X)' to avoid precedence issues
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Commit Message

Yonghong Song Sept. 14, 2021, 10:30 p.m. UTC 
BTF_KIND_TAG ELF format has a component_idx which might have value -1.
test_btf may confuse it with common_type.name as NAME_NTH checkes
high 16bit to be 0xffff. Change NAME_NTH high 16bit check to be
0xfffe so it won't confuse with component_idx.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
---
 tools/testing/selftests/bpf/prog_tests/btf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c
index 649f87382c8d..ad39f4d588d0 100644
--- a/tools/testing/selftests/bpf/prog_tests/btf.c
+++ b/tools/testing/selftests/bpf/prog_tests/btf.c
@@ -39,8 +39,8 @@  static bool always_log;
 #define BTF_END_RAW 0xdeadbeef
 #define NAME_TBD 0xdeadb33f
 
-#define NAME_NTH(N) (0xffff0000 | N)
-#define IS_NAME_NTH(X) ((X & 0xffff0000) == 0xffff0000)
+#define NAME_NTH(N) (0xfffe0000 | N)
+#define IS_NAME_NTH(X) ((X & 0xffff0000) == 0xfffe0000)
 #define GET_NAME_NTH_IDX(X) (X & 0x0000ffff)
 
 #define MAX_NR_RAW_U32 1024