[PATCH v3 5/6] erofs: use struct lockref to replace handcrafted approach

[Yue Hu]

On Mon, 29 May 2023 20:37:27 +0800
Gao Xiang <hsiangkao at linux.alibaba.com> wrote:

> Let's avoid the current handcrafted lockref although `struct lockref`
> inclusion usually increases extra 4 bytes with an explicit spinlock if
> CONFIG_DEBUG_SPINLOCK is off.
> 
> Apart from the size difference, note that the meaning of refcount is
> also changed to active users. IOWs, it doesn't take an extra refcount
> for XArray tree insertion.
> 
> I don't observe any significant performance difference at least on
> our cloud compute server but the new one indeed simplifies the
> overall codebase a bit.
> 
> Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Reviewed-by: Yue Hu <huyue2 at coolpad.com>