linux-kernel - Re: [PATCH] x86/mm: fix return value of p[um]dp_set_access

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Message-ID: <2fde036a-f64e-ce58-65bf-a089e7c673aa@intel.com>
Date:   Fri, 20 Sep 2019 09:16:12 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Wei Yang <richardw.yang@...ux.intel.com>
Cc:     dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/mm: fix return value of p[um]dp_set_access_flags

On 9/19/19 7:18 PM, Wei Yang wrote:
> Last but not least, since update_mmu_cache_pmd is empty, even return
> value is not correct, it doesn't break anything.

In other words, this patch has no functional effect and does not provide
a "fix".  What's the point of patching this stuff if it has no effect?