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From: Nathan Chancellor <natechancellor@gmail.com>
To: Tariq Toukan <tariqt@mellanox.com>,
	"David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org, linux-rdma@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Nathan Chancellor <natechancellor@gmail.com>
Subject: [PATCH] net/mlx4: Use cpumask_available for eq->affinity_mask
Date: Fri, 21 Sep 2018 02:44:12 -0700	[thread overview]
Message-ID: <20180921094412.15547-1-natechancellor@gmail.com> (raw)

Clang warns that the address of a pointer will always evaluated as true
in a boolean context:

drivers/net/ethernet/mellanox/mlx4/eq.c:243:11: warning: address of
array 'eq->affinity_mask' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!eq->affinity_mask || cpumask_empty(eq->affinity_mask))
            ~~~~~^~~~~~~~~~~~~
1 warning generated.

Use cpumask_available, introduced in commit f7e30f01a9e2 ("cpumask: Add
helper cpumask_available()"), which does the proper checking and avoids
this warning.

Link: https://github.com/ClangBuiltLinux/linux/issues/86
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
 drivers/net/ethernet/mellanox/mlx4/eq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c
index 1f3372c1802e..2df92dbd38e1 100644
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -240,7 +240,8 @@ static void mlx4_set_eq_affinity_hint(struct mlx4_priv *priv, int vec)
 	struct mlx4_dev *dev = &priv->dev;
 	struct mlx4_eq *eq = &priv->eq_table.eq[vec];
 
-	if (!eq->affinity_mask || cpumask_empty(eq->affinity_mask))
+	if (!cpumask_available(eq->affinity_mask) ||
+	    cpumask_empty(eq->affinity_mask))
 		return;
 
 	hint_err = irq_set_affinity_hint(eq->irq, eq->affinity_mask);
-- 
2.19.0


             reply	other threads:[~2018-09-21  9:44 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-21  9:44 Nathan Chancellor [this message]
2018-09-23  7:52 ` [PATCH] net/mlx4: Use cpumask_available for eq->affinity_mask Tariq Toukan

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