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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84847275fa0sm1119528b3a.22.2026.07.08.10.06.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jul 2026 10:07:02 -0700 (PDT) From: Sang-Heon Jeon To: akpm@linux-foundation.org, Albert Ou , Catalin Marinas , David Hildenbrand , Palmer Dabbelt , Paul Walmsley , Will Deacon Cc: linux-mm@kvack.org, Sang-Heon Jeon , Alexandre Ghiti , "Liam R. Howlett" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka Subject: [PATCH 0/3] mm/early_ioremap: clarify and clean up early_ioremap_reset() Date: Thu, 9 Jul 2026 02:06:44 +0900 Message-ID: <20260708170647.362562-1-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: ED151180004 X-Stat-Signature: rzdqydzcgn1kg79fubtfpsr47grwoypa X-HE-Tag: 1783530423-31547 X-HE-Meta: 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 pIRWpK+a YFWi8snU4M6ZLotOrzBdV+Ioqi8F8cS3/zRK5japWuswpDKgr7mkIzgJWk9waI+nuMViRd3OyhA6kXdVTfLV2jGvrMhCDa3gXERdudlZbAmyFXaWTcYX+qQdmT+OunV46DiEPWgVbmj3PShcdPzraIn672NMloB4ur+tc8Sf4m0v6jUAnEwSXRLGf0MUaI06dBcu4pkpEK4otZ8OadJIl1Mz4cfHtfh7VD3HYsqNr418Tg83wlM4NoNO8+RQh6oK8fHD9kozlwWzj92RUpKspHI3aWbRznrvlZjmRb0R45D16WmBy8OKb1Vm82hGRoMg8t5Zgr3tWO5+dYM3WTcskjzC7n+rTmWOwsxsPSnnwcIrtvKACkCxWWaRg4seN4b/5Rg+8WqVazRoZz1QAK/iEJnDrF1KjMWW372IjI42xtrcurQxgI75ATGMOJQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: __late_set_fixmap() and __late_clear_fixmap() are only used after early_ioremap_reset() has been called, but the comment above them does not say anything about that. So arm64, riscv and powerpc, whose __set_fixmap() works before and after paging_init(), describe the same situation in three different ways: calls reset defines the macros arm64 yes yes riscv no yes powerpc no no Patch 1 documents when early_ioremap_reset() needs to be called and that only architectures calling it need to define the macros. Patches 2 and 3 remove the unneeded riscv macros, which are unreachable, and the arm64 reset call and macros, which change nothing. No functional change. Sang-Heon Jeon (3): mm/early_ioremap: clarify early_ioremap_reset() semantics riscv: remove unused __late_set_fixmap() and __late_clear_fixmap() arm64: remove early_ioremap_reset() call and __late_* macros arch/arm64/include/asm/fixmap.h | 3 --- arch/arm64/kernel/setup.c | 2 -- arch/riscv/include/asm/fixmap.h | 3 --- mm/early_ioremap.c | 10 +++++++--- 4 files changed, 7 insertions(+), 11 deletions(-) -- 2.43.0