From: Nathan Chancellor <nathan@kernel.org>
To: Saeed Mahameed <saeedm@nvidia.com>,
Leon Romanovsky <leon@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
netdev@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH net-next] net/mlx5: Use cpumask_available() in mlx5_eq_create_generic()
Date: Thu, 17 Jun 2021 17:03:59 -0700 [thread overview]
Message-ID: <20210618000358.2402567-1-nathan@kernel.org> (raw)
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@kernel.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
next reply other threads:[~2021-06-18 0:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 0:03 Nathan Chancellor [this message]
2021-06-21 8:53 ` [PATCH net-next] net/mlx5: Use cpumask_available() in mlx5_eq_create_generic() Leon Romanovsky
2021-06-22 21:39 ` Saeed Mahameed
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