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SubjectRe: [PATCH 7/12] i386 sg: add support for chaining scatterlists
On 5/10/07, Jens Axboe <jens.axboe@oracle.com> wrote:
> [...]
> +static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
> + struct scatterlist *sgl)
> +{
> +#ifndef ARCH_HAS_SG_CHAIN
> + BUG();
> +#endif

Hmmm ... so we better also make sure all users call this from within
an "#ifdef ARCH_HAS_SG_CHAIN" themselves (or else make this a config
option defined in the arch/.../defconfig of archs that support this
and then make the calling code's Kconfig option "depends on ... &&
ARCH_FOO").

(Just saw a previous thread, Andrew seems to have beaten me to this observation)
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