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vfs: move __sb_{start,end}_write* to fs.h

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Now that we've straightened out the callers, move these three functions
to fs.h since they're fairly trivial.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Darrick J. Wong 2020-11-10 16:50:21 -08:00
parent 8a3c84b649
commit 9b8523423b
2 changed files with 18 additions and 33 deletions
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30
fs/super.c
View file

@ -1631,36 +1631,6 @@ int super_setup_bdi(struct super_block *sb)
}
EXPORT_SYMBOL(super_setup_bdi);
/*
* This is an internal function, please use sb_end_{write,pagefault,intwrite}
* instead.
*/
void __sb_end_write(struct super_block *sb, int level)
{
percpu_up_read(sb->s_writers.rw_sem + level-1);
}
EXPORT_SYMBOL(__sb_end_write);
/*
* This is an internal function, please use sb_start_{write,pagefault,intwrite}
* instead.
*/
void __sb_start_write(struct super_block *sb, int level)
{
percpu_down_read(sb->s_writers.rw_sem + level - 1);
}
EXPORT_SYMBOL(__sb_start_write);
/*
* This is an internal function, please use sb_start_{write,pagefault,intwrite}
* instead.
*/
bool __sb_start_write_trylock(struct super_block *sb, int level)
{
return percpu_down_read_trylock(sb->s_writers.rw_sem + level - 1);
}
EXPORT_SYMBOL_GPL(__sb_start_write_trylock);
/**
* sb_wait_write - wait until all writers to given file system finish
* @sb: the super for which we wait

21
include/linux/fs.h
View file

@ -1580,9 +1580,24 @@ extern struct timespec64 current_time(struct inode *inode);
* Snapshotting support.
*/
void __sb_end_write(struct super_block *sb, int level);
void __sb_start_write(struct super_block *sb, int level);
bool __sb_start_write_trylock(struct super_block *sb, int level);
/*
* These are internal functions, please use sb_start_{write,pagefault,intwrite}
* instead.
*/
static inline void __sb_end_write(struct super_block *sb, int level)
{
percpu_up_read(sb->s_writers.rw_sem + level-1);
}
static inline void __sb_start_write(struct super_block *sb, int level)
{
percpu_down_read(sb->s_writers.rw_sem + level - 1);
}
static inline bool __sb_start_write_trylock(struct super_block *sb, int level)
{
return percpu_down_read_trylock(sb->s_writers.rw_sem + level - 1);
}
#define __sb_writers_acquired(sb, lev) \
percpu_rwsem_acquire(&(sb)->s_writers.rw_sem[(lev)-1], 1, _THIS_IP_)