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Date: Tue, 19 Jun 2018 16:23:07 +0100
From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, will.deacon@arm.com,
        marc.zyngier@arm.com, linux@dominikbrodowski.net,
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Subject: Re: [PATCHv3 11/19] arm64: don't reload GPRs after apply_ssbd
Message-ID: <20180619152306.iz55qshhqsnql5vy@armageddon.cambridge.arm.com>
References: <20180618120310.39527-1-mark.rutland@arm.com>
 <20180618120310.39527-12-mark.rutland@arm.com>
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On Mon, Jun 18, 2018 at 01:03:02PM +0100, Mark Rutland wrote:
> Now that all of the syscall logic works on the saved pt_regs, apply_ssbd
> can safely corrupt x0-x3 in the entry paths, and we no longer need to
> restore them. So let's remove the logic doing so.
> 
> With that logic gone, we can fold the branch target into the macro, so
> that callers need not deal with this. GAS provides \@, which provides a
> unique value per macro invocation, which we can use to create a unique
> label.
> 
> Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>