linux-kernel - Re: [PATCH v3] KVM: arm64: fix compile error because of shift overflow

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Message-Id: <166012247956.2742754.12984698031789785989.b4-ty@kernel.org>
Date:   Wed, 10 Aug 2022 10:08:10 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
        Yang Yingliang <yangyingliang@...wei.com>,
        linux-kernel@...r.kernel.org
Cc:     oliver.upton@...ux.dev, suzuki.poulose@....com,
        james.morse@....com, alexandru.elisei@....com
Subject: Re: [PATCH v3] KVM: arm64: fix compile error because of shift overflow

On Wed, 10 Aug 2022 09:34:35 +0800, Yang Yingliang wrote:
> Using GENMASK() to generate the masks of device type and device id, it makes
> code unambiguous, also it can fix the following fix compile error because of
> shift overflow when using low verison gcc(mine version is 7.5):
> 
> In function ‘kvm_vm_ioctl_set_device_addr.isra.38’,
>     inlined from ‘kvm_arch_vm_ioctl’ at arch/arm64/kvm/arm.c:1454:10:
> ././include/linux/compiler_types.h:354:38: error: call to ‘__compiletime_assert_599’ \
> declared with attribute error: FIELD_GET: mask is not constant
>   _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)

Applied to fixes, thanks!

[1/1] KVM: arm64: fix compile error because of shift overflow
      commit: ae3b1da95413614f96ffa23d200929c6f809c807

Cheers,

	M.
-- 
Marc Zyngier <maz@...nel.org>