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b=CXv0u/LLebHMF6g/2GK3TvCGBelT7PPH0HIRnflCf6AZ0lVwkZgTWwxvuQI+s9qMo ft7jV7D8Qxva2ItzH/MkbLDHDEbO0hANLYn5fxEXZ55ukUHdB0mGreeyNQb0gRBVoX GvDcmGzAlIjOGHFlErUh2IZlaV8eljjni7igTE2vwGw9kUGtTtHVU7D7lYZifyzzve 4z5Diw9TikIM7l4mmswNF7YEcDdBlTEZfcWirr61J0mPjYl9O4asyE/fZMh9ABnACS hQuaEnLI0zSjN74PdduIr5wdHA9UxKRrDlhcwOf6tR/zJArMSWXwVbnieyTVkKv2i+ bB5D41vN0Gm3w== Date: Sat, 10 Oct 2026 12:01:26 +0200 From: Mike Rapoport To: Rob Herring Cc: Marek Szyprowski , linux-mm@kvack.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Saravana Kannan , Oreoluwa Babatunde , Wandun , Andrew Morton Subject: Re: [PATCH 2/2] of: reserved_mem: allocate and map the reserved_mem array early Message-ID: References: <20261008094125.3197971-1-m.szyprowski@samsung.com> <20261008094125.3197971-3-m.szyprowski@samsung.com> <20261008140515.GB183998-robh@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261008140515.GB183998-robh@kernel.org> X-Stat-Signature: 5kqay1g334obc8jja5iejhh11zmhwgct X-Rspam-User: X-Rspamd-Queue-Id: ED58C1C000A X-Rspamd-Server: rspam08 X-HE-Tag: 1791626492-87612 X-HE-Meta: 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 AteL+3YU JGFIZrnN4eqe2+myK8kAR0qCWehQD6xPsE31vNXXsYLLfJpJC8vaJu4f7/MAALYhCkaiuEmlEcw0yUHwH+vVEomOqiiplohggsFvgRacQnUY45/Ui1iACenoXGVnvmeOmnHZXTqSHWaiV6VwgbAEGbauZMvtu+hOdXFXiLv33FxPq0GCMLDxjTIS4xF/wnfGacmv6rGaiGE9sfnQT20nYlDe3g0b8vjNb7eet7a7wZoj2Th/a9eW4uNGfbiiTPjwUzMt/Ovogc/XbOh3tBiQIzJkLOnQ0/FTElR4IuQ4t7Wsk46UggSPQHhB/obpbz4Hqh9tQegx5USWq/8ZKIdQGzbIU6zyR6OoV3UAsndXNigcuI3zsKFHVe9qhWPjIfoG/WCxofdKvOmWbfoKK8kPWoPpw8A== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Oct 08, 2026 at 09:05:15AM -0500, Rob Herring wrote: > On Thu, Oct 08, 2026 at 11:41:23AM +0200, Marek Szyprowski wrote: > > Get rid of the static, limited-size reserved_mem array and replace it > > with array allocated by memblock_alloc_raw() and accessed through a > > temporary early_memremap() mapping. Such mapping is needed for some > > architectures (like ARM64), where linear map is not yet available during > > early boot scan. Having a single, writeable array with all reserved > > regions removes the need to perform two step initialization introduced > > by commit 8a6e02d0c00e ("of: reserved_mem: Restructure how the reserved > > memory regions are processed"), so all regions can be processed > > directly during the early scan again. > > > > Suggested-by: Mike Rapoport > > Link: https://lore.kernel.org/all/asc6brs_g0ky0wOM@kernel.org/ > > Assisted-By: Claude Opus 5.5 > > Assisted-by: LLM > > is the new way... Probably not any more :) https://lore.kernel.org/all/20261009083137.3-1-sashal@kernel.org/ > > Signed-off-by: Marek Szyprowski > > --- > > drivers/of/fdt.c | 3 - > > drivers/of/of_private.h | 2 - > > drivers/of/of_reserved_mem.c | 251 ++++++++++++++--------------------- > > 3 files changed, 96 insertions(+), 160 deletions(-) -- Sincerely yours, Mike.