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Date: Thu, 17 Jun 2021 17:03:59 -0700 From: Nathan Chancellor <nathan@...nel.org> To: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org> Cc: Nick Desaulniers <ndesaulniers@...gle.com>, netdev@...r.kernel.org, linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com, Nathan Chancellor <nathan@...nel.org> Subject: [PATCH net-next] net/mlx5: Use cpumask_available() in mlx5_eq_create_generic() When CONFIG_CPUMASK_OFFSTACK is unset, cpumask_var_t is not a pointer but a single element array, meaning its address in a structure cannot be NULL as long as it is not the first element, which it is not. This results in a clang warning: drivers/net/ethernet/mellanox/mlx5/core/eq.c:715:14: warning: address of array 'param->affinity' will always evaluate to 'true' [-Wpointer-bool-conversion] if (!param->affinity) ~~~~~~~~^~~~~~~~ 1 warning generated. The helper cpumask_available was added in commit f7e30f01a9e2 ("cpumask: Add helper cpumask_available()") to handle situations like this so use it to keep the meaning of the code the same while resolving the warning. Fixes: e4e3f24b822f ("net/mlx5: Provide cpumask at EQ creation phase") Link: https://github.com/ClangBuiltLinux/linux/issues/1400 Signed-off-by: Nathan Chancellor <nathan@...nel.org> --- drivers/net/ethernet/mellanox/mlx5/core/eq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c index 7e5b3826eae5..d3356771e628 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c @@ -710,7 +710,7 @@ mlx5_eq_create_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq = kvzalloc(sizeof(*eq), GFP_KERNEL); int err; - if (!param->affinity) + if (!cpumask_available(param->affinity)) return ERR_PTR(-EINVAL); if (!eq) base-commit: 8fe088bd4fd12f4c8899b51d5bc3daad98767d49 -- 2.32.0.93.g670b81a890
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