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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-91bcbb0961csm22365796d6.30.2026.10.16.06.17.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Oct 2026 06:17:44 -0700 (PDT) Date: Fri, 16 Oct 2026 09:17:42 -0400 From: Gregory Price To: "David Hildenbrand (Arm)" Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, ziy@nvidia.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, ying.huang@linux.alibaba.com, kernel test robot Subject: Re: [PATCH] mm/mempolicy: convert mempolicy refcnt to refcount_t Message-ID: References: <20261015231322.3392551-1-gourry@gourry.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 580991C0006 X-Rspam-User: X-Stat-Signature: fgoq3gthth7young8jz4doq5zhpirrfs X-HE-Tag: 1792156666-940746 X-HE-Meta: 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 mULYLJZZ 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Oct 16, 2026 at 09:54:33AM +0200, David Hildenbrand (Arm) wrote: > On 10/16/26 01:13, Gregory Price (Meta) wrote: > > struct mempolicy uses an atomic_t as a pure reference counter. > > > > Convert it to refcount_t so that overflow and underflow are caught > > by the refcount saturation checks. > > > > This silences the atomic_as_refcounter.cocci warning, which started > > matching __mpol_put() when it switched kmem_cache_free() to kfree_rcu(). > > > > No functional change for correct callers. > > > > Reported-by: kernel test robot > > Closes: https://lore.kernel.org/oe-kbuild-all/202610061946.Bx22ZFrw-lkp@intel.com/ > > Signed-off-by: Gregory Price (Meta) > > --- > > Wondering if we want a Fixes? If this only fixes cocci warnings I guess not. > That was my thought. > Acked-by: David Hildenbrand (Arm)