From 0c7ae130698e70107430254e79fbe996b4d37ab5 Mon Sep 17 00:00:00 2001 From: Paul Chaignon Date: Sat, 2 May 2026 12:12:40 +0200 Subject: tools/headers: Regenerate stddef.h to fix BPF selftests MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With commit dacbfc167808 ("crypto: af_alg - Annotate struct af_alg_iv with __counted_by"), two selftests, test_tag and crypto_sanity, now indirectly rely on the __counted_by macro. On systems with commit dacbfc167808 in the installed UAPI headers, the selftests build fails with: In file included from tools/testing/selftests/bpf/prog_tests/crypto_sanity.c:7: /usr/include/linux/if_alg.h:45:22: error: expected ‘:’, ‘,’, ‘;’, ‘}’ or ‘__attribute__’ before ‘__counted_by’ 45 | __u8 iv[] __counted_by(ivlen); | ^~~~~~~~~~~~ This patch fixes it by regenerating stddef.h in tools/include using the instructions from commit a778f5d46b62 ("tools/headers: Pull in stddef.h to uapi to fix BPF selftests build in CI"). Fixes: dacbfc167808 ("crypto: af_alg - Annotate struct af_alg_iv with __counted_by") Signed-off-by: Paul Chaignon Reviewed-by: Alan Maguire Tested-by: Ihor Solodrai Link: https://lore.kernel.org/r/8da8ef16055aa452d940668ed5359ce54adc6b0b.1777715500.git.paul.chaignon@gmail.com Signed-off-by: Alexei Starovoitov --- tools/include/uapi/linux/stddef.h | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/tools/include/uapi/linux/stddef.h b/tools/include/uapi/linux/stddef.h index c53cde425406..457498259494 100644 --- a/tools/include/uapi/linux/stddef.h +++ b/tools/include/uapi/linux/stddef.h @@ -3,7 +3,6 @@ #define _LINUX_STDDEF_H - #ifndef __always_inline #define __always_inline __inline__ #endif @@ -36,6 +35,11 @@ struct __struct_group_tag(TAG) { MEMBERS } ATTRS NAME; \ } ATTRS +#ifdef __cplusplus +/* sizeof(struct{}) is 1 in C++, not 0, can't use C version of the macro. */ +#define __DECLARE_FLEX_ARRAY(T, member) \ + T member[0] +#else /** * __DECLARE_FLEX_ARRAY() - Declare a flexible array usable in a union * @@ -52,3 +56,23 @@ TYPE NAME[]; \ } #endif + +#ifndef __counted_by +#define __counted_by(m) +#endif + +#ifndef __counted_by_le +#define __counted_by_le(m) +#endif + +#ifndef __counted_by_be +#define __counted_by_be(m) +#endif + +#ifndef __counted_by_ptr +#define __counted_by_ptr(m) +#endif + +#define __kernel_nonstring + +#endif /* _LINUX_STDDEF_H */ -- cgit v1.2.3