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charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 9AF6E14001A X-Stat-Signature: uo6ga4uaqyrk5e57rxpqhuq6twx8ptxc X-Rspam-User: X-HE-Tag: 1733923968-999600 X-HE-Meta: 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 OnrxTtxR JCEcYVabnhlVhv5marQnnDZhSwoJ/eLNYZsYe3Q4ztsUIAuloctF9XwplzCx//bbTXeKguT4IuNYDLKFyZ9xI/i6hVO3RLMeyiMASv/zO5HwoZmRrb/Rf0fCQPd5r7VFOj0bz+GRhloDmuDAoidBjBgfPJFnBJas/bhBX0ExdMJj7Z3u0BrfV7essJlR1qIfLMmW69KqwZsmduSlDRr+JjG3iXDyFwOo6jfM/N9qKIVxsTQ4YAutwUVDyBGhPxBh11xpWa+0lRr8wpaOtA7h+85IvRZikW/iYorJkXzFFc9HmcAKkc8lM2ZbJNlPcnO9kqsFa X-Bogosity: Ham, tests=bogofilter, spamicity=0.000479, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Dec 10, 2024 at 5:06=E2=80=AFPM Arnd Bergmann wro= te: > From: Arnd Bergmann > > CONFIG_HIGHPTE was added in linux-2.6.32, a few years before 64-bit > support. At the time it made sense, as the CONFIG_ARM_LPAE option allowed > systems with 16GB of memory that made lowmem a particularly scarce > resource, and the HIGHPTE implementation gave feature parity with 32-bit > x86 and frv machines. > > Since Arm is the last architecture remaining that uses this, and almost > no 32-bit machines support more than 4GB of RAM, the cost of continuing > to maintain HIGHPTE seems unjustified, so remove it here to allow > simplifying the generic page table handling. > > Link: https://lore.kernel.org/lkml/20241204103042.1904639-8-arnd@kernel.o= rg/T/#u > Signed-off-by: Arnd Bergmann I'm in favor of this if the x86 patch goes in. We need to get rid of highmem anyway and this will need to happen sooner or later either way. Acked-by: Linus Walleij Yours, Linus Walleij