include/linux/jbd_common.h

   1 #ifndef _LINUX_JBD_STATE_H
   2 #define _LINUX_JBD_STATE_H
   3
   4 #include <linux/bit_spinlock.h>
   5
   6 static inline struct buffer_head *jh2bh(struct journal_head *jh)
   7 {
   8         return jh->b_bh;
   9 }
  10
  11 static inline struct journal_head *bh2jh(struct buffer_head *bh)
  12 {
  13         return bh->b_private;
  14 }
  15
  16 static inline void jbd_lock_bh_state(struct buffer_head *bh)
  17 {
  18         bit_spin_lock(BH_State, &bh->b_state);
  19 }
  20
  21 static inline int jbd_trylock_bh_state(struct buffer_head *bh)
  22 {
  23         return bit_spin_trylock(BH_State, &bh->b_state);
  24 }
  25
  26 static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
  27 {
  28         return bit_spin_is_locked(BH_State, &bh->b_state);
  29 }
  30
  31 static inline void jbd_unlock_bh_state(struct buffer_head *bh)
  32 {
  33         bit_spin_unlock(BH_State, &bh->b_state);
  34 }
  35
  36 static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
  37 {
  38         bit_spin_lock(BH_JournalHead, &bh->b_state);
  39 }
  40
  41 static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
  42 {
  43         bit_spin_unlock(BH_JournalHead, &bh->b_state);
  44 }
  45
  46 #endif