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 extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
  12 extern int swap_cgroup_swapon(int type, unsigned long max_pages);
  13 extern void swap_cgroup_swapoff(int type);
  14
  15 #else
  16
  17 static inline
  18 unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
  19 {
  20         return 0;
  21 }
  22
  23 static inline
  24 unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
  25 {
  26         return 0;
  27 }
  28
  29 static inline int
  30 swap_cgroup_swapon(int type, unsigned long max_pages)
  31 {
  32         return 0;
  33 }
  34
  35 static inline void swap_cgroup_swapoff(int type)
  36 {
  37         return;
  38 }
  39
  40 #endif /* CONFIG_MEMCG_SWAP */
  41
  42 #endif /* __LINUX_SWAP_CGROUP_H */