Re: [v3 PATCH 1/1] init: fix race between rootfs mount and firmware loading

[Oleg Nesterov <oleg@redhat.com>]

On 09/18, Roman Pen wrote:
>
> +void wait_for_rootfs(void)
> +{
> +	/* Avoid waiting for ourselves */
> +	if (WARN_ON(is_global_init(current)))
> +		return;
> +	else
> +		wait_event(rootfs_waitq, rootfs_mounted);
> +}

Ah, wait, the is_global_init() check doesn't look right in any case.

What if /sbin/init does sys_init_module() and this module does
request_firmware() ?

I think we should only warn if init is going to wait,

	/* Avoid waiting for ourselves */
	if (rootfs_mounted || WARN_ON(is_global_init(current)))
		return;

	__wait_event(rootfs_waitq, rootfs_mounted);


> +EXPORT_SYMBOL(wait_for_rootfs);

Why?

Oleg.