From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hedi Berriche <hedi.berriche@hpe.com>
Subject: Please revert 7212e37cbdf9 from 4.4-stable
Date: Mon, 11 Mar 2019 13:48:14 +0000
Message-ID: <20190311134814.GC30367@sarge.linuxathome.me>
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To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Hedi Berriche <hedi.berriche@hpe.com>, Borislav Petkov <bp@suse.de>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Russ Anderson <rja@hpe.com>, Dimitri Sivanich <sivanich@hpe.com>, Steve Wahl <steve.wahl@hpe.com>, Mike Travis <mike.travis@hpe.com>, Andy Shevchenko <andy@infradead.org>, Bhupesh Sharma <bhsharma@redhat.com>, Darren Hart <dvhart@infradead.org>, "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>, linux-efi <linux-efi@vger.kernel.org>, platform-driver-x86@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>, x86-ml <x86@kernel.org>
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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.

Cheers,
Hedi.
-- 
Be careful of reading health books, you might die of a misprint.
	-- Mark Twain