Can anyone plz explain me the fields

[Tarun Batra]

Can anyone plz explain me the fields


 skb = kmem_cache_alloc(skbuff_head_cache, gfp_mask & ~_ _GFP_DMA);
    ... ... ...
    size = SKB_DATA_ALIGN(size);
    data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);



It is the simplified version of skb_alloc().
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