4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nathan Chancellor natechancellor@gmail.com
[ Upstream commit 8ac1ee6f4d62e781e3b3fd8b9c42b70371427669 ]
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 Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlx4/eq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c +++ b/drivers/net/ethernet/mellanox/mlx4/eq.c @@ -228,7 +228,8 @@ static void mlx4_set_eq_affinity_hint(st 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);