forked from luck/tmp_suning_uos_patched
c9b3a8ccb7
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>
47 lines
974 B
C
47 lines
974 B
C
#ifndef _LINUX_JBD_STATE_H
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#define _LINUX_JBD_STATE_H
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#include <linux/bit_spinlock.h>
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static inline struct buffer_head *jh2bh(struct journal_head *jh)
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{
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return jh->b_bh;
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}
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static inline struct journal_head *bh2jh(struct buffer_head *bh)
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{
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return bh->b_private;
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}
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static inline void jbd_lock_bh_state(struct buffer_head *bh)
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{
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bit_spin_lock(BH_State, &bh->b_state);
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}
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static inline int jbd_trylock_bh_state(struct buffer_head *bh)
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{
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return bit_spin_trylock(BH_State, &bh->b_state);
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}
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static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
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{
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return bit_spin_is_locked(BH_State, &bh->b_state);
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}
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static inline void jbd_unlock_bh_state(struct buffer_head *bh)
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{
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bit_spin_unlock(BH_State, &bh->b_state);
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}
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static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
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{
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bit_spin_lock(BH_JournalHead, &bh->b_state);
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}
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static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
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{
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bit_spin_unlock(BH_JournalHead, &bh->b_state);
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}
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#endif
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