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Subject: RE: [PATCH v4 20/35] net/intel: write descriptors using non-volatile
 pointers
Date: Tue, 10 Feb 2026 00:08:44 +0100
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Thread-Topic: [PATCH v4 20/35] net/intel: write descriptors using non-volatile
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Bruce Richardson" <bruce.richardson@intel.com>,
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> +static inline void
> +write_txd(volatile void *txd, uint64_t qw0, uint64_t qw1)
> +{
> +	uint64_t *txd_qw =3D __rte_assume_aligned(RTE_CAST_PTR(void *,
> txd), 16);
> +
> +	txd_qw[0] =3D rte_cpu_to_le_64(qw0);
> +	txd_qw[1] =3D rte_cpu_to_le_64(qw1);
> +}

How about using __rte_aligned() instead, something like this (untested):

struct __rte_aligned(16) txd_t {
	uint64_t	qw0;
	uint64_t	qw1;
};

*RTE_CAST_PTR(volatile struct txd_t *, txd) =3D {
	rte_cpu_to_le_64(qw0),
	rte_cpu_to_le_64(qw1)
};


And why strip the "volatile"?