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Re: [PATCH v5 1/2] Use kmap_atomic when rewriting attached page

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  Re: [PATCH v5 1/2] Use kmap_atomic when rewriting attached page Christoph Hellwig <hch@lst.de> - 2016-08-11 16:20 +0200

#1460561 — Re: [PATCH v5 1/2] Use kmap_atomic when rewriting attached page

> +static unsigned int ata_format_dsm_trim_descr(struct scatterlist *sg, u32 num,
> +					      u64 sector, u32 count)
> +{
> +	void *ptr = kmap_atomic(sg_page(sg));


Please use sg_copy_from_buffer to be safe against all corner cases.

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