LXR linux/net/core/kmap

   1#include <linux/highmem.h>
   2
   3static inline void *kmap_skb_frag(const skb_frag_t *frag)
   4{
   5#ifdef CONFIG_HIGHMEM
   6        BUG_ON(in_irq());
   7
   8        local_bh_disable();
   9#endif
  10        return kmap_atomic(skb_frag_page(frag), KM_SKB_DATA_SOFTIRQ);
  11}
  12
  13static inline void kunmap_skb_frag(void *vaddr)
  14{
  15        kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
  16#ifdef CONFIG_HIGHMEM
  17        local_bh_enable();
  18#endif
  19}
  20