linux-kernel - Re: Please revert 7212e37cbdf9 from 4.4-stable

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Date:   Mon, 11 Mar 2019 20:29:44 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Borislav Petkov <bp@...e.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Russ Anderson <rja@....com>,
        Dimitri Sivanich <sivanich@....com>,
        Steve Wahl <steve.wahl@....com>,
        Mike Travis <mike.travis@....com>,
        Andy Shevchenko <andy@...radead.org>,
        Bhupesh Sharma <bhsharma@...hat.com>,
        Darren Hart <dvhart@...radead.org>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        linux-efi <linux-efi@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>, x86-ml <x86@...nel.org>
Subject: Re: Please revert 7212e37cbdf9 from 4.4-stable

On Mon, Mar 11, 2019 at 01:48:14PM +0000, Hedi Berriche wrote:
>Hi Greg,
>
>Could you please revert
>
>	7212e37cbdf9 x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls
>
>from 4.4-stable?
>
>In 4.4-stable efi_runtime_lock as defined in drivers/firmware/efi/runtime-wrappers.c
>is a spinlock (given it predates commit dce48e351c0d) and commit
>
>	f331e766c4be x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls
>
>which 7212e37cbdf9 is a backport of, needs it to be a semaphore.

I've queued up the revert. I'm not sure how it ended up on 4.4 to begin
with; sorry about that and thank you.

--
Thanks,
Sasha