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[76.210.143.223]) by smtp.gmail.com with ESMTPSA id g19sm7436820pfb.152.2020.07.10.20.59.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Jul 2020 20:59:17 -0700 (PDT) Subject: Add and use a generic copy_oldmem_page() Date: Fri, 10 Jul 2020 20:55:41 -0700 Message-Id: <20200711035544.2832154-1-palmer@dabbelt.com> X-Mailer: git-send-email 2.27.0.383.g050319c2ae-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org, Arnd Bergmann , rppt@linux.ibm.com, akpm@linux-foundation.org, linus.walleij@linaro.org, mchehab+samsung@kernel.org, gregory.0xf0@gmail.com, masahiroy@kernel.org, Nick Desaulniers , bgolaszewski@baylibre.com, Palmer Dabbelt , mingo@kernel.org, ben-linux@fluff.org, peterz@infradead.org, broonie@kernel.org, davem@davemloft.net, rdunlap@infradead.org, uwe@kleine-koenig.org, dan.j.williams@intel.com, mhiramat@kernel.org, matti.vaittinen@fi.rohmeurope.com, zaslonko@linux.ibm.com, willy@infradead.org, krzk@kernel.org, paulmck@kernel.org, pmladek@suse.com, brendanhiggins@google.com, keescook@chromium.org, glider@google.com, elver@google.com, davidgow@google.com, mark.rutland@arm.com, ardb@kernel.org, takahiro.akashi@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-team@android.com From: Palmer Dabbelt To: mick@ics.forth.gr Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While adding support for kexec, Nick recently copied the arm64 copy_oldmem_page() into the RISC-V port. Since this is shared verbatim with arm and arm64 already, I'd like to add a generic version and so we can use it instead. I haven't converted over the MIPS, PPC, or SH ports: while I think we could figure out how to share a version, they're not exactly the same right now. S/390 and x86 are definitely meaningfully different. Unless there are any objections I'll include the first patch along with the RISC-V kexec support, which I'm hoping to have for 5.9. The code, based on 5.8-rc4, is at ssh://git@gitolite.kernel.org/pub/scm/linux/kernel/git/palmer/linux.git -b copy_oldmem_page .