On Wed, Apr 15, 2020 at 09:20:33PM +0800, Zhiqiang Liu wrote:
> From: Zhiqiang Liu <liuzhiqiang26@xxxxxxxxxx>
>
> coccicheck reports:
> fs/dcache.c:1027:1-10: second lock on line 1027
>
> In d_prune_aliases, before goto restart we should unlock
> inode->i_lock.
>
> Fixes: 29355c3904e ("d_prune_alias(): just lock the parent and call __dentry_kill()")
> Signed-off-by: Zhiqiang Liu <liuzhiqiang26@xxxxxxxxxx>
> Signed-off-by: Feilong Lin <linfeilong@xxxxxxxxxx>
> ---
> fs/dcache.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/dcache.c b/fs/dcache.c
> index b280e07e162b..1532ebe9d9ca 100644
> --- a/fs/dcache.c
> +++ b/fs/dcache.c
> @@ -1030,6 +1030,7 @@ void d_prune_aliases(struct inode *inode)
> if (!dentry->d_lockref.count) {
> struct dentry *parent = lock_parent(dentry);
> if (likely(!dentry->d_lockref.count)) {
> + spin_unlock(&inode->i_lock);
> __dentry_kill(dentry);
> dput(parent);
> goto restart;
> --
Doesn't __dentry_kill() already do the unlock, via dentry_unlink_inode()?
- Eric
