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Date:   Thu, 3 Dec 2020 11:54:07 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Dan Williams <dan.j.williams@intel.com>
Cc:     tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
        stable@vger.kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>, x86@kernel.org,
        "H. Peter Anvin" <hpa@zytor.com>, Yi Zhang <yi.zhang@redhat.com>,
        linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org,
        willy@infradead.org
Subject: Re: [PATCH] x86/mm: Fix leak of pmd ptlock
Message-ID: <20201203105407.GL2414@hirez.programming.kicks-ass.net>
References: <160697689204.605323.17629854984697045602.stgit@dwillia2-desk3.amr.corp.intel.com>
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On Wed, Dec 02, 2020 at 10:28:12PM -0800, Dan Williams wrote:
> pmd_free() is close, but it is a messy fit due to requiring an @mm arg.

Hurpm, only parisc and s390 actually use that argument. And s390
_really_ needs it, because they're doing runtime folding per mm.