linux-kernel - Re: [PATCH v4 02/18] KVM: arm64: selftests: Add sysreg.h

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Date:   Tue, 14 Sep 2021 11:39:00 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Raghavendra Rao Ananta <rananta@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
        Andrew Jones <drjones@...hat.com>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Peter Shier <pshier@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Reiji Watanabe <reijiw@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v4 02/18] KVM: arm64: selftests: Add sysreg.h

On Mon, Sep 13, 2021 at 04:38:29PM -0700, Raghavendra Rao Ananta wrote:

> I was looking into this though and could only find some utilities such
> as tools/iio/, tools/spi/, and so on, which seem to create a symbolic
> link to the header present in the kernel (rather than copying). Is
> this what you were referring to?

TBH I'm not exactly aware of how it works, just that it does work - the
main case I was thinking of was the uapi headers, mainly when used in
kselftest.  Those look like they're actual copies rather than symlinks
so I guess it's a different mechanism to what's used by the other tools
you found.

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