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Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Acked-by: Vladimir Medvedkin On 2/12/2026 4:27 PM, Bruce Richardson wrote: > Following recent changes to the test-meson-build.sh script[1] to use more > build-types warnings are seen in the hash library GFNI code about values > possibly being uninitialized. > > In function ‘_mm512_mask_permutexvar_epi8’, > inlined from ‘__rte_thash_gfni’ at ../lib/hash/rte_thash_x86_gfni.h:150:6: > /usr/lib/gcc/x86_64-linux-gnu/15/include/avx512vbmiintrin.h:97:20: error: ‘tuple_bytes_2’ may be used uninitialized [-Werror=maybe-uninitialized] > > These all appear to be a false positive, but fix these by explicitly > zero-initializing the offending values. > > [1] 177acaf5cf75 ("devtools: test different build types") > > Fixes: 4fd8c4cb0de1 ("hash: add new Toeplitz hash implementation") > Cc: stable@dpdk.org > > Signed-off-by: Bruce Richardson > --- > lib/hash/rte_thash_x86_gfni.h | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/lib/hash/rte_thash_x86_gfni.h b/lib/hash/rte_thash_x86_gfni.h > index 99226b7592..69973503fd 100644 > --- a/lib/hash/rte_thash_x86_gfni.h > +++ b/lib/hash/rte_thash_x86_gfni.h > @@ -89,9 +89,9 @@ __rte_thash_gfni(const uint64_t *mtrx, const uint8_t *tuple, > const __m512i shift_8 = _mm512_set1_epi8(8); > __m512i xor_acc = _mm512_setzero_si512(); > __m512i perm_bytes = _mm512_setzero_si512(); > - __m512i vals, matrixes, tuple_bytes_2; > + __m512i vals, matrixes, tuple_bytes_2 = _mm512_setzero_si512(); > __m512i tuple_bytes = _mm512_setzero_si512(); > - __mmask64 load_mask, permute_mask_2; > + __mmask64 load_mask, permute_mask_2 = 0; > __mmask64 permute_mask = 0; > int chunk_len = 0, i = 0; > uint8_t mtrx_msk; -- Regards, Vladimir