Am Samstag, 14. Dezember 2013, 21:54:55 schrieb Richard Weinberger:
> In all three cases, new_inode_pseudo(), iget_locked() and iget5_locked(),
> we own the new inode exclusively at this point and therefore taking
> ->i_lock to protect ->i_state/->i_hash against concurrent access is
> superfluous.
>
> Signed-off-by: Richard Weinberger <richard@xxxxxx>
> ---
> fs/inode.c | 6 ------
> 1 file changed, 6 deletions(-)
>
> diff --git a/fs/inode.c b/fs/inode.c
> index 4bcdad3..5f2a735 100644
> --- a/fs/inode.c
> +++ b/fs/inode.c
> @@ -869,9 +869,7 @@ struct inode *new_inode_pseudo(struct super_block *sb)
> struct inode *inode = alloc_inode(sb);
>
> if (inode) {
> - spin_lock(&inode->i_lock);
> inode->i_state = 0;
> - spin_unlock(&inode->i_lock);
> INIT_LIST_HEAD(&inode->i_sb_list);
> }
> return inode;
> @@ -1025,10 +1023,8 @@ struct inode *iget5_locked(struct super_block *sb,
> unsigned long hashval, if (set(inode, data))
> goto set_failed;
>
> - spin_lock(&inode->i_lock);
> inode->i_state = I_NEW;
> hlist_add_head(&inode->i_hash, head);
> - spin_unlock(&inode->i_lock);
> inode_sb_list_add(inode);
> spin_unlock(&inode_hash_lock);
>
> @@ -1092,10 +1088,8 @@ struct inode *iget_locked(struct super_block *sb,
> unsigned long ino) old = find_inode_fast(sb, head, ino);
> if (!old) {
> inode->i_ino = ino;
> - spin_lock(&inode->i_lock);
> inode->i_state = I_NEW;
> hlist_add_head(&inode->i_hash, head);
> - spin_unlock(&inode->i_lock);
> inode_sb_list_add(inode);
> spin_unlock(&inode_hash_lock);
Any comments on this?
Thanks,
//richard
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