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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2020-11-10 16:50:21 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2020-11-10 16:53:07 -0800 |
| commit | 8a3c84b649b033024d2349f96234b26cbd6083a6 (patch) | |
| tree | 087a8483185efcea30c589182dfe28514f9d1f2a /fs/super.c | |
| parent | 22843291efc986ce7722610073fcf85a39b4cb13 (diff) | |
| download | linux-8a3c84b649b033024d2349f96234b26cbd6083a6.tar.gz linux-8a3c84b649b033024d2349f96234b26cbd6083a6.tar.bz2 linux-8a3c84b649b033024d2349f96234b26cbd6083a6.zip | |
vfs: separate __sb_start_write into blocking and non-blocking helpers
Break this function into two helpers so that it's obvious that the
trylock versions return a value that must be checked, and the blocking
versions don't require that. While we're at it, clean up the return
type mismatch.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/fs/super.c b/fs/super.c index e1fd667454d4..59aa59279133 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1645,16 +1645,22 @@ EXPORT_SYMBOL(__sb_end_write); * This is an internal function, please use sb_start_{write,pagefault,intwrite} * instead. */ -int __sb_start_write(struct super_block *sb, int level, bool wait) +void __sb_start_write(struct super_block *sb, int level) { - if (!wait) - return percpu_down_read_trylock(sb->s_writers.rw_sem + level-1); - - percpu_down_read(sb->s_writers.rw_sem + level-1); - return 1; + 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 |