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SubjectRe: [patch] f2fs: use _safe() version of list_for_each
From
2013/1/21, Dan Carpenter <dan.carpenter@oracle.com>:
> This is calling list_del() inside a loop which is a problem when we try
> move to the next item on the list. I've converted it to use the _safe
> version. And also, as a cleanup, I've converted it to use
> list_for_each_entry instead of list_for_each.
>
Hi Dan.
I can't understand why this patch is needed yet.
Could you elaborate more ?

Thanks.

> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> Static analysis stuff. Untested. Please review carefully.
>
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index 6cc046d..f42e406 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -173,10 +173,9 @@ out:
> static void destroy_fsync_dnodes(struct f2fs_sb_info *sbi,
> struct list_head *head)
> {
> - struct list_head *this;
> - struct fsync_inode_entry *entry;
> - list_for_each(this, head) {
> - entry = list_entry(this, struct fsync_inode_entry, list);
> + struct fsync_inode_entry *entry, *tmp;
> +
> + list_for_each_entry_safe(entry, tmp, head, list) {
> iput(entry->inode);
> list_del(&entry->list);
> kmem_cache_free(fsync_entry_slab, entry);
> --
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