mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Paul Gortmaker](/assets/img/avatar_default.png)
The bit_spinlock functions are only used for the jbd_lock_bh_state
functions (and friends) in jbd_common.h and are not directly used
by either of jbd.h or jbd2.h content.
The jbd_common file is new as of commit 446066724c
("jdb/jbd2: factor
out common functions from the jbd[2] header files") but common
(and isolated) headers were not considered for factoring at that time.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
46 lines
974 B
C
46 lines
974 B
C
#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)
|
|
{
|
|
bit_spin_lock(BH_State, &bh->b_state);
|
|
}
|
|
|
|
static inline int jbd_trylock_bh_state(struct buffer_head *bh)
|
|
{
|
|
return bit_spin_trylock(BH_State, &bh->b_state);
|
|
}
|
|
|
|
static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
|
|
{
|
|
return bit_spin_is_locked(BH_State, &bh->b_state);
|
|
}
|
|
|
|
static inline void jbd_unlock_bh_state(struct buffer_head *bh)
|
|
{
|
|
bit_spin_unlock(BH_State, &bh->b_state);
|
|
}
|
|
|
|
static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
|
|
{
|
|
bit_spin_lock(BH_JournalHead, &bh->b_state);
|
|
}
|
|
|
|
static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
|
|
{
|
|
bit_spin_unlock(BH_JournalHead, &bh->b_state);
|
|
}
|
|
|
|
#endif
|