From 5072b1c211107fca80b75f0ac0ca6f90e3385837 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Mon, 6 Feb 2023 12:53:38 +0800 Subject: [PATCH] crypto: ecc - Silence sparse warning Rewrite the bitwise operations to silence the sparse warnings: CHECK ../crypto/ecc.c ../crypto/ecc.c:1387:39: warning: dubious: !x | y ../crypto/ecc.c:1397:47: warning: dubious: !x | y Signed-off-by: Herbert Xu Reviewed-by: Vitaly Chikunov Signed-off-by: Herbert Xu --- crypto/ecc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/crypto/ecc.c b/crypto/ecc.c index 7315217c8f73..f53fb4d6af99 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -1384,7 +1384,8 @@ void ecc_point_mult_shamir(const struct ecc_point *result, num_bits = max(vli_num_bits(u1, ndigits), vli_num_bits(u2, ndigits)); i = num_bits - 1; - idx = (!!vli_test_bit(u1, i)) | ((!!vli_test_bit(u2, i)) << 1); + idx = !!vli_test_bit(u1, i); + idx |= (!!vli_test_bit(u2, i)) << 1; point = points[idx]; vli_set(rx, point->x, ndigits); @@ -1394,7 +1395,8 @@ void ecc_point_mult_shamir(const struct ecc_point *result, for (--i; i >= 0; i--) { ecc_point_double_jacobian(rx, ry, z, curve); - idx = (!!vli_test_bit(u1, i)) | ((!!vli_test_bit(u2, i)) << 1); + idx = !!vli_test_bit(u1, i); + idx |= (!!vli_test_bit(u2, i)) << 1; point = points[idx]; if (point) { u64 tx[ECC_MAX_DIGITS];