参照元

説明

引数

返り値

参考

実装

/**
 * sg_chain - Chain two sglists together
 * @prv:        First scatterlist
 * @prv_nents:  Number of entries in prv
 * @sgl:        Second scatterlist
 *
 * Description:
 *   Links @prv@ and @sgl@ together, to form a longer scatterlist.
 *
 **/
static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
                            struct scatterlist *sgl)
{
        /*
         * offset and length are unused for chain entry.  Clear them.
         */
        prv[prv_nents - 1].offset = 0;
        prv[prv_nents - 1].length = 0;
        /*
         * Set lowest bit to indicate a link pointer, and make sure to clear
         * the termination bit if it happens to be set.
         */
        prv[prv_nents - 1].page_link = ((unsigned long) sgl | 0x01) & ~0x02;
}

コメント


トップ   編集 凍結 差分 履歴 添付 複製 名前変更 リロード   新規 一覧 検索 最終更新   ヘルプ   最終更新のRSS
Last-modified: 2016-02-24 (水) 19:20:57