linux-kernel - Re: [PATCH] x86/sgx: Replace kmap/kunmap

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Message-ID: <Yzdl1Ur72OI60Cre@kernel.org>
Date:   Sat, 1 Oct 2022 00:55:33 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Kristen Carlson Accardi <kristen@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        ira.weiny@...el.com
Subject: Re: [PATCH] x86/sgx: Replace kmap/kunmap_atomic calls

On Thu, Sep 29, 2022 at 09:06:46AM -0700, Kristen Carlson Accardi wrote:
> It is not necessary to disable page faults or preemption when
> using kmap calls, so replace kmap_atomic() and kunmap_atomic()
> calls with more the more appropriate kmap_local_page() and
> kunmap_local() calls.
> 
> Signed-off-by: Kristen Carlson Accardi <kristen@...ux.intel.com>

Missing "why". I believe you're right but since the existing code
is working, you should extend the reasoning just a bit.

BR, Jarkko