linux-kernel - Re: [RFC][PATCH v2 1/3] efivars: Disable external interrupt while holding efivars->lock

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Message-ID: <CAGTjWtAeL4AMWhWeiCrtXjumNSCjT1KTXd0KnH3_-4g_L91=Dw@mail.gmail.com>
Date:	Mon, 20 Aug 2012 12:17:07 -0700
From:	Mike Waychison <mikew@...gle.com>
To:	Seiji Aguchi <seiji.aguchi@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Luck, Tony (tony.luck@...el.com)" <tony.luck@...el.com>,
	"Matthew Garrett (mjg@...hat.com)" <mjg@...hat.com>,
	"dzickus@...hat.com" <dzickus@...hat.com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Satoru Moriya <satoru.moriya@....com>
Subject: Re: [RFC][PATCH v2 1/3] efivars: Disable external interrupt while
 holding efivars->lock

Acked-by: Mike Waychison <mikew@...gle.com>

> @@ -1101,11 +1107,12 @@ out_free:
>  void unregister_efivars(struct efivars *efivars)
>  {
>         struct efivar_entry *entry, *n;
> +       unsigned long flags;
>
>         list_for_each_entry_safe(entry, n, &efivars->list, list) {
> -               spin_lock(&efivars->lock);
> +               spin_lock_irqsave(&efivars->lock, flags);
>                 list_del(&entry->list);
> -               spin_unlock(&efivars->lock);
> +               spin_unlock_irqrestore(&efivars->lock, flags);
>                 efivar_unregister(entry);
>         }
>         if (efivars->new_var)

Feel free to remove any other uses of flags where you know that you
are being called from process context.
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