On Wed 25-01-23 07:58:38, Christoph Hellwig wrote:
> sb_init_dio_done_wq is also used by the iomap code, so move it to
> super.c in preparation for building direct-io.c conditionally.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/direct-io.c | 24 ------------------------
> fs/internal.h | 4 +---
> fs/super.c | 24 ++++++++++++++++++++++++
> 3 files changed, 25 insertions(+), 27 deletions(-)
>
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index 03d381377ae10a..ab0d7ea89813a6 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -558,30 +558,6 @@ static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio)
> return ret;
> }
>
> -/*
> - * Create workqueue for deferred direct IO completions. We allocate the
> - * workqueue when it's first needed. This avoids creating workqueue for
> - * filesystems that don't need it and also allows us to create the workqueue
> - * late enough so the we can include s_id in the name of the workqueue.
> - */
> -int sb_init_dio_done_wq(struct super_block *sb)
> -{
> - struct workqueue_struct *old;
> - struct workqueue_struct *wq = alloc_workqueue("dio/%s",
> - WQ_MEM_RECLAIM, 0,
> - sb->s_id);
> - if (!wq)
> - return -ENOMEM;
> - /*
> - * This has to be atomic as more DIOs can race to create the workqueue
> - */
> - old = cmpxchg(&sb->s_dio_done_wq, NULL, wq);
> - /* Someone created workqueue before us? Free ours... */
> - if (old)
> - destroy_workqueue(wq);
> - return 0;
> -}
> -
> static int dio_set_defer_completion(struct dio *dio)
> {
> struct super_block *sb = dio->inode->i_sb;
> diff --git a/fs/internal.h b/fs/internal.h
> index a803cc3cf716ab..cb0c0749661aae 100644
> --- a/fs/internal.h
> +++ b/fs/internal.h
> @@ -120,6 +120,7 @@ extern bool trylock_super(struct super_block *sb);
> struct super_block *user_get_super(dev_t, bool excl);
> void put_super(struct super_block *sb);
> extern bool mount_capable(struct fs_context *);
> +int sb_init_dio_done_wq(struct super_block *sb);
>
> /*
> * open.c
> @@ -187,9 +188,6 @@ extern void mnt_pin_kill(struct mount *m);
> */
> extern const struct dentry_operations ns_dentry_operations;
>
> -/* direct-io.c: */
> -int sb_init_dio_done_wq(struct super_block *sb);
> -
> /*
> * fs/stat.c:
> */
> diff --git a/fs/super.c b/fs/super.c
> index 12c08cb20405d5..904adfbacdcf3c 100644
> --- a/fs/super.c
> +++ b/fs/super.c
> @@ -1764,3 +1764,27 @@ int thaw_super(struct super_block *sb)
> return thaw_super_locked(sb);
> }
> EXPORT_SYMBOL(thaw_super);
> +
> +/*
> + * Create workqueue for deferred direct IO completions. We allocate the
> + * workqueue when it's first needed. This avoids creating workqueue for
> + * filesystems that don't need it and also allows us to create the workqueue
> + * late enough so the we can include s_id in the name of the workqueue.
> + */
> +int sb_init_dio_done_wq(struct super_block *sb)
> +{
> + struct workqueue_struct *old;
> + struct workqueue_struct *wq = alloc_workqueue("dio/%s",
> + WQ_MEM_RECLAIM, 0,
> + sb->s_id);
> + if (!wq)
> + return -ENOMEM;
> + /*
> + * This has to be atomic as more DIOs can race to create the workqueue
> + */
> + old = cmpxchg(&sb->s_dio_done_wq, NULL, wq);
> + /* Someone created workqueue before us? Free ours... */
> + if (old)
> + destroy_workqueue(wq);
> + return 0;
> +}
> --
> 2.39.0
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
