[PATCH chao/erofs-dev rebased v2 07/12] staging: erofs: fix `erofs_workgroup_{try_to_freeze, unfreeze}'

[Chao Yu]

On 2018/11/14 23:25, Gao Xiang wrote:
> There are two minor issues in the current freeze interface:
> 
>    1) Freeze interfaces have not related with CONFIG_DEBUG_SPINLOCK,
>       therefore fix the incorrect conditions;
> 
>    2) For SMP platforms, it should also disable preemption before
>       doing atomic_cmpxchg in case that some high priority tasks
>       preempt between atomic_cmpxchg and disable_preempt, then spin
>       on the locked refcount later.
> 
> Signed-off-by: Gao Xiang <gaoxiang25 at huawei.com>

Reviewed-by: Chao Yu <yuchao0 at huawei.com>

Thanks,