Re: [PATCH] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks

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> diff --git a/fs/exec.c b/fs/exec.c
> index 725d7ef..13f8e7f 100644
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -242,9 +242,10 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
>  	 * use STACK_TOP because that can depend on attributes which aren't
>  	 * configured yet.
>  	 */
> +	BUG_ON(VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP);

Can we use BUILD_BUG_ON()? 

but anyway
	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>



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