From: kernel test robot <lkp(a)intel.com&gt; Zero-length and one-element arrays are deprecated, see Documentation/process/deprecated.rst Flexible-array members should be used instead. Generated by: scripts/coccinelle/misc/flexible_array.cocci Fixes: 7540b2861e52 ("crypto: aesni - AVX512 version of AESNI-GCM using VPCLMULQDQ") CC: Megha Dey <megha.dey(a)intel.com&gt; Reported-by: kernel test robot <lkp(a)intel.com&gt; Signed-off-by: kernel test robot <lkp(a)intel.com&gt; Signed-off-by: Julia Lawall <julia.lawall(a)inria.fr&gt; --- tree: https://github.com/meghadey/crypto for_crypto_avx512 head: a89c5880f0d6260dd593bf579df26f2a2d56ac32 commit: 7540b2861e5292b5993f8e693fc69510b2a7277a [5/6] crypto: aesni - AVX512 version of AESNI-GCM using VPCLMULQDQ :::::: branch date: 7 hours ago :::::: commit date: 7 hours ago aesni-intel_glue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -87,7 +87,7 @@ struct gcm_context_data { u64 partial_block_len; u64 unused; /* Allocate space for hash_keys later */ - u8 hash_keys[0]; + u8 hash_keys[]; }; asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,