include/linux/swap_cgroup.h

   1 #ifndef __LINUX_SWAP_CGROUP_H
   2 #define __LINUX_SWAP_CGROUP_H
   3
   4 #include <linux/swap.h>
   5
   6 #ifdef CONFIG_MEMCG_SWAP
   7
   8 extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
   9                                         unsigned short old, unsigned short new);
  10 extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id,
  11                                          unsigned int nr_ents);
  12 extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
  13 extern int swap_cgroup_swapon(int type, unsigned long max_pages);
  14 extern void swap_cgroup_swapoff(int type);
  15
  16 #else
  17
  18 static inline
  19 unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id,
  20                                   unsigned int nr_ents)
  21 {
  22         return 0;
  23 }
  24
  25 static inline
  26 unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
  27 {
  28         return 0;
  29 }
  30
  31 static inline int
  32 swap_cgroup_swapon(int type, unsigned long max_pages)
  33 {
  34         return 0;
  35 }
  36
  37 static inline void swap_cgroup_swapoff(int type)
  38 {
  39         return;
  40 }
  41
  42 #endif /* CONFIG_MEMCG_SWAP */
  43
  44 #endif /* __LINUX_SWAP_CGROUP_H */