1 files changed, 70 insertions, 0 deletions
diff --git a/kernel/include/linux/jbd_common.h b/kernel/include/linux/jbd_common.h
new file mode 100644
index 000000000..a90a6f5ca
--- /dev/null
+++ b/kernel/include/linux/jbd_common.h
@@ -0,0 +1,70 @@
+#ifndef _LINUX_JBD_STATE_H
+#define _LINUX_JBD_STATE_H
+
+#include <linux/bit_spinlock.h>
+
+static inline struct buffer_head *jh2bh(struct journal_head *jh)
+{
+	return jh->b_bh;
+}
+
+static inline struct journal_head *bh2jh(struct buffer_head *bh)
+{
+	return bh->b_private;
+}
+
+static inline void jbd_lock_bh_state(struct buffer_head *bh)
+{
+#ifndef CONFIG_PREEMPT_RT_BASE
+	bit_spin_lock(BH_State, &bh->b_state);
+#else
+	spin_lock(&bh->b_state_lock);
+#endif
+}
+
+static inline int jbd_trylock_bh_state(struct buffer_head *bh)
+{
+#ifndef CONFIG_PREEMPT_RT_BASE
+	return bit_spin_trylock(BH_State, &bh->b_state);
+#else
+	return spin_trylock(&bh->b_state_lock);
+#endif
+}
+
+static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
+{
+#ifndef CONFIG_PREEMPT_RT_BASE
+	return bit_spin_is_locked(BH_State, &bh->b_state);
+#else
+	return spin_is_locked(&bh->b_state_lock);
+#endif
+}
+
+static inline void jbd_unlock_bh_state(struct buffer_head *bh)
+{
+#ifndef CONFIG_PREEMPT_RT_BASE
+	bit_spin_unlock(BH_State, &bh->b_state);
+#else
+	spin_unlock(&bh->b_state_lock);
+#endif
+}
+
+static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
+{
+#ifndef CONFIG_PREEMPT_RT_BASE
+	bit_spin_lock(BH_JournalHead, &bh->b_state);
+#else
+	spin_lock(&bh->b_journal_head_lock);
+#endif
+}
+
+static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
+{
+#ifndef CONFIG_PREEMPT_RT_BASE
+	bit_spin_unlock(BH_JournalHead, &bh->b_state);
+#else
+	spin_unlock(&bh->b_journal_head_lock);
+#endif
+}
+
+#endif