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bh=KEyBJjOxNHoPN44Ocnab3KH7ph4eN7qBE/3bFv4RRfY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=knPQqBoaOSqw1cr48QtzRQ/zK7rsfJesZfj99LIFjlhYY5GL4GRM+09iaRBEacJOA PpW4f89PVRrRa1qaJMXKjPxyYChpmVbmMarHlxKL8oubRYUGRHaf4eTi1eoAmfcs/A z+XALiNhJa4Jg7YLKsIC7/UnO+1MLl6GYroHZiMEo7kmvWSJB6qdNAZTnRBI4GuWST qI/h0y3dJZQmFPfrNNM2OP699l8jk4oH+1CaLnhXtKpUprYoaVt+q3h/AEY48e/NUN 0e3CjIjs4puKXlP5mldmRCGiUCT3VzCtNW8QX6wleq3YP0pLnIWO2wHU8yHoGXwDbr mH9dRa8rPmzVw== From: SJ Park To: "Gregory Price (Meta)" Cc: SJ Park , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, david@kernel.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 Date: Thu, 15 Oct 2026 16:46:24 -0700 Message-ID: <20261015234625.113115-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261015231322.3392551-1-gourry@gourry.net> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 74CCAA0008 X-Stat-Signature: 5jehyqzce7btxee1b48iff94t4xq85nw X-HE-Tag: 1792107993-838120 X-HE-Meta: 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 8H12k22j NHqWBtlgqzzANAPmkbhIm9IAe36ssc2PCsgJ3qCiXodxo9bsAuA8LOGB3T07ZUeUTtaTo/zjWKGrR0g2tWJPaFUbjphPqeLrMsmC8AgCmcCZj0k3M4/dbRBKZBzHtB8m7QUjjD85q25ert7x3XbVhCh63BdwIWLBu+Gcsg+i7XHg7r+iTm59Ep2rul1nVRUYxpWqwT2mRKz/YEbTYuqpwmQGwOXUWpxkvcrKOSu6Rk2dYsOQOFi3WoWvGEPI0xM80pBKkddxEfRfRHV1AcDVkgFWboz8k2LJvKnUa+bbrKpn8vD1BYi4smb8Jiqk3rY+ntHHxfP6CGsO0jvMowL/zuzmLFvQMnb3kzClyHSgj7decTsEM9ZOj03j0I6ZeCKrRmmoWwCel/4JtXvaVLxSfjYaz3K1TQVWF4f77ABvh7w/5+mledd6NSkEsQg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 15 Oct 2026 19:13:22 -0400 "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. Looks correct to me. > > Reported-by: kernel test robot > Closes: https://lore.kernel.org/oe-kbuild-all/202610061946.Bx22ZFrw-lkp@intel.com/ > Signed-off-by: Gregory Price (Meta) Reviewed-by: SJ Park Thanks, SJ [...]