kernel/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 #ifndef CONFIG_PREEMPT_RT_BASE
  19         bit_spin_lock(BH_State, &bh->b_state);
  20 #else
  21         spin_lock(&bh->b_state_lock);
  22 #endif
  23 }
  24
  25 static inline int jbd_trylock_bh_state(struct buffer_head *bh)
  26 {
  27 #ifndef CONFIG_PREEMPT_RT_BASE
  28         return bit_spin_trylock(BH_State, &bh->b_state);
  29 #else
  30         return spin_trylock(&bh->b_state_lock);
  31 #endif
  32 }
  33
  34 static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
  35 {
  36 #ifndef CONFIG_PREEMPT_RT_BASE
  37         return bit_spin_is_locked(BH_State, &bh->b_state);
  38 #else
  39         return spin_is_locked(&bh->b_state_lock);
  40 #endif
  41 }
  42
  43 static inline void jbd_unlock_bh_state(struct buffer_head *bh)
  44 {
  45 #ifndef CONFIG_PREEMPT_RT_BASE
  46         bit_spin_unlock(BH_State, &bh->b_state);
  47 #else
  48         spin_unlock(&bh->b_state_lock);
  49 #endif
  50 }
  51
  52 static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
  53 {
  54 #ifndef CONFIG_PREEMPT_RT_BASE
  55         bit_spin_lock(BH_JournalHead, &bh->b_state);
  56 #else
  57         spin_lock(&bh->b_journal_head_lock);
  58 #endif
  59 }
  60
  61 static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
  62 {
  63 #ifndef CONFIG_PREEMPT_RT_BASE
  64         bit_spin_unlock(BH_JournalHead, &bh->b_state);
  65 #else
  66         spin_unlock(&bh->b_journal_head_lock);
  67 #endif
  68 }
  69
  70 #endif