Re: [PATCH] [RFC] mm: fs: Invalidate BH LRU during page migration

[Matthew Wilcox]

On Mon, Feb 01, 2021 at 10:55:47PM -0800, Chris Goldsworthy wrote:
> @@ -1289,6 +1289,8 @@ static inline void check_irqs_on(void)
>  #endif
>  }
>  
> +bool bh_migration_done = true;

What protects this global variable?  Or is there some subtle reason it
doesn't need protection, in which case, please put that in a comment.